From 6629326b89b6e69cc44276e1649a31158bb2c819 Mon Sep 17 00:00:00 2001 From: Hillf Danton Date: Fri, 23 Mar 2012 15:01:48 -0700 Subject: mm: hugetlb: cleanup duplicated code in unmapping vm range Fix code duplication in __unmap_hugepage_range(), such as pte_page() and huge_pte_none(). Signed-off-by: Hillf Danton Cc: Michal Hocko Cc: KAMEZAWA Hiroyuki Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/mm/hugetlb.c b/mm/hugetlb.c index afa057a..b8ce6f4 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -2331,16 +2331,23 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start, if (huge_pmd_unshare(mm, &address, ptep)) continue; + pte = huge_ptep_get(ptep); + if (huge_pte_none(pte)) + continue; + + /* + * HWPoisoned hugepage is already unmapped and dropped reference + */ + if (unlikely(is_hugetlb_entry_hwpoisoned(pte))) + continue; + + page = pte_page(pte); /* * If a reference page is supplied, it is because a specific * page is being unmapped, not a range. Ensure the page we * are about to unmap is the actual page of interest. */ if (ref_page) { - pte = huge_ptep_get(ptep); - if (huge_pte_none(pte)) - continue; - page = pte_page(pte); if (page != ref_page) continue; @@ -2353,16 +2360,6 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start, } pte = huge_ptep_get_and_clear(mm, address, ptep); - if (huge_pte_none(pte)) - continue; - - /* - * HWPoisoned hugepage is already unmapped and dropped reference - */ - if (unlikely(is_hugetlb_entry_hwpoisoned(pte))) - continue; - - page = pte_page(pte); if (pte_dirty(pte)) set_page_dirty(page); list_add(&page->lru, &page_list); -- cgit v0.10.2 From f6adb9a6aec0ec9540e15f354e5cdec88b2aea33 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Fri, 23 Mar 2012 15:01:49 -0700 Subject: um: don't restore current->blocked on error If we fail to setup the signal stack frame then we don't need to restore current->blocked because it is not modified by setup_signal_stack_*. Acked-by: Oleg Nesterov Acked-by: Richard Weinberger Tested-by: Richard Weinberger Signed-off-by: Matt Fleming Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c index e8b889d..8382e0b 100644 --- a/arch/um/kernel/signal.c +++ b/arch/um/kernel/signal.c @@ -65,13 +65,9 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr, #endif err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset); - if (err) { - spin_lock_irq(¤t->sighand->siglock); - current->blocked = *oldset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + if (err) force_sigsegv(signr, current); - } else { + else { spin_lock_irq(¤t->sighand->siglock); sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask); -- cgit v0.10.2 From d982d5955e9033015a2cc119aa7c0a878e275964 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Fri, 23 Mar 2012 15:01:50 -0700 Subject: um: use set_current_blocked() and block_sigmask() As described in commit e6fa16ab9c1e ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov Cc: Richard Weinberger Signed-off-by: Matt Fleming Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c index 8382e0b..fb12f4c 100644 --- a/arch/um/kernel/signal.c +++ b/arch/um/kernel/signal.c @@ -67,15 +67,8 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr, if (err) force_sigsegv(signr, current); - else { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, - &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, signr); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } + else + block_sigmask(ka, signr); return err; } @@ -158,12 +151,11 @@ int do_signal(void) */ long sys_sigsuspend(int history0, int history1, old_sigset_t mask) { + sigset_t blocked; + mask &= _BLOCKABLE; - spin_lock_irq(¤t->sighand->siglock); - current->saved_sigmask = current->blocked; - siginitset(¤t->blocked, mask); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + siginitset(&blocked, mask); + set_current_blocked(&blocked); current->state = TASK_INTERRUPTIBLE; schedule(); -- cgit v0.10.2 From b502bd1152472dc1b98c60434f23c23b280c7b94 Mon Sep 17 00:00:00 2001 From: Muthu Kumar Date: Fri, 23 Mar 2012 15:01:50 -0700 Subject: magic.h: move some FS magic numbers into magic.h - Move open-coded filesystem magic numbers into magic.h - Rearrange magic.h so that the filesystem-related constants are grouped together. Signed-off-by: Muthukumar R Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 50c6a1e..c57ae92 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -31,13 +31,13 @@ #include #include #include +#include #include #include #include #include -#define MTD_INODE_FS_MAGIC 0x11307854 static DEFINE_MUTEX(mtd_mutex); static struct vfsmount *mtd_inode_mnt __read_mostly; diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 1ffb603..613aa06 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -699,7 +700,7 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent) [3] = {"register", &bm_register_operations, S_IWUSR}, /* last one */ {""} }; - int err = simple_fill_super(sb, 0x42494e4d, bm_files); + int err = simple_fill_super(sb, BINFMTFS_MAGIC, bm_files); if (!err) sb->s_op = &s_ops; return err; diff --git a/fs/block_dev.c b/fs/block_dev.c index a9ff300..e08f6a20 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -506,7 +507,7 @@ static const struct super_operations bdev_sops = { static struct dentry *bd_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, 0x62646576); + return mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC); } static struct file_system_type bd_type = { diff --git a/fs/pipe.c b/fs/pipe.c index fe0502f..25feaa3 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include diff --git a/include/linux/magic.h b/include/linux/magic.h index b7ed475..e15192c 100644 --- a/include/linux/magic.h +++ b/include/linux/magic.h @@ -9,7 +9,6 @@ #define CRAMFS_MAGIC 0x28cd3d45 /* some random number */ #define CRAMFS_MAGIC_WEND 0x453dcd28 /* magic number with the wrong endianess */ #define DEBUGFS_MAGIC 0x64626720 -#define SYSFS_MAGIC 0x62656572 #define SECURITYFS_MAGIC 0x73636673 #define SELINUX_MAGIC 0xf97cff8c #define RAMFS_MAGIC 0x858458f6 /* some random number */ @@ -27,7 +26,6 @@ #define HPFS_SUPER_MAGIC 0xf995e849 #define ISOFS_SUPER_MAGIC 0x9660 #define JFFS2_SUPER_MAGIC 0x72b6 -#define ANON_INODE_FS_MAGIC 0x09041934 #define PSTOREFS_MAGIC 0x6165676C #define MINIX_SUPER_MAGIC 0x137F /* minix v1 fs, 14 char names */ @@ -40,7 +38,6 @@ #define NCP_SUPER_MAGIC 0x564c /* Guess, what 0x564c is :-) */ #define NFS_SUPER_MAGIC 0x6969 #define OPENPROM_SUPER_MAGIC 0x9fa1 -#define PROC_SUPER_MAGIC 0x9fa0 #define QNX4_SUPER_MAGIC 0x002f /* qnx4 fs detection */ #define QNX6_SUPER_MAGIC 0x68191122 /* qnx6 fs detection */ @@ -52,15 +49,24 @@ #define REISER2FS_JR_SUPER_MAGIC_STRING "ReIsEr3Fs" #define SMB_SUPER_MAGIC 0x517B -#define USBDEVICE_SUPER_MAGIC 0x9fa2 #define CGROUP_SUPER_MAGIC 0x27e0eb -#define FUTEXFS_SUPER_MAGIC 0xBAD1DEA #define STACK_END_MAGIC 0x57AC6E9D +#define V9FS_MAGIC 0x01021997 + +#define BDEVFS_MAGIC 0x62646576 +#define BINFMTFS_MAGIC 0x42494e4d #define DEVPTS_SUPER_MAGIC 0x1cd1 +#define FUTEXFS_SUPER_MAGIC 0xBAD1DEA +#define PIPEFS_MAGIC 0x50495045 +#define PROC_SUPER_MAGIC 0x9fa0 #define SOCKFS_MAGIC 0x534F434B -#define V9FS_MAGIC 0x01021997 +#define SYSFS_MAGIC 0x62656572 +#define USBDEVICE_SUPER_MAGIC 0x9fa2 +#define MTD_INODE_FS_MAGIC 0x11307854 +#define ANON_INODE_FS_MAGIC 0x09041934 + #endif /* __LINUX_MAGIC_H__ */ diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 77257c9..6d626ff 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -1,8 +1,6 @@ #ifndef _LINUX_PIPE_FS_I_H #define _LINUX_PIPE_FS_I_H -#define PIPEFS_MAGIC 0x50495045 - #define PIPE_DEF_BUFFERS 16 #define PIPE_BUF_FLAG_LRU 0x01 /* page is on the LRU */ -- cgit v0.10.2 From d314d74c695f967e10598467a326f41c78ed1e20 Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Fri, 23 Mar 2012 15:01:51 -0700 Subject: nmi watchdog: do not use cpp symbol in Kconfig ARCH_HAS_NMI_WATCHDOG is a macro defined by arch, but config HARDLOCKUP_DETECTOR depends on it. This is wrong, ARCH_HAS_NMI_WATCHDOG has to be a Kconfig config, and arch's need it should select it explicitly. Signed-off-by: WANG Cong Acked-by: Don Zickus Acked-by: Mike Frysinger Cc: David Howells Cc: David Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/Kconfig b/arch/Kconfig index 5b448a7..a6f14f6 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -120,6 +120,9 @@ config HAVE_KRETPROBES config HAVE_OPTPROBES bool + +config HAVE_NMI_WATCHDOG + bool # # An arch should select this if it provides all these things: # diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index abe5a9e..c1269a1 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -36,6 +36,7 @@ config BLACKFIN select GENERIC_ATOMIC64 select GENERIC_IRQ_PROBE select IRQ_PER_CPU if SMP + select HAVE_NMI_WATCHDOG if NMI_WATCHDOG config GENERIC_CSUM def_bool y diff --git a/arch/blackfin/include/asm/irq.h b/arch/blackfin/include/asm/irq.h index 12f4060..89de539 100644 --- a/arch/blackfin/include/asm/irq.h +++ b/arch/blackfin/include/asm/irq.h @@ -38,8 +38,4 @@ #include -#ifdef CONFIG_NMI_WATCHDOG -# define ARCH_HAS_NMI_WATCHDOG -#endif - #endif /* _BFIN_IRQ_H_ */ diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig index 8f1c40d..3aa3de0 100644 --- a/arch/mn10300/Kconfig +++ b/arch/mn10300/Kconfig @@ -5,6 +5,7 @@ config MN10300 select GENERIC_IRQ_SHOW select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_KGDB + select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER config AM33_2 def_bool n diff --git a/arch/mn10300/include/asm/reset-regs.h b/arch/mn10300/include/asm/reset-regs.h index 10c7502..8ca2a42 100644 --- a/arch/mn10300/include/asm/reset-regs.h +++ b/arch/mn10300/include/asm/reset-regs.h @@ -17,10 +17,6 @@ #ifdef __KERNEL__ -#ifdef CONFIG_MN10300_WD_TIMER -#define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */ -#endif - /* * watchdog timer registers */ diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index ca5580e..1666de8 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -29,6 +29,7 @@ config SPARC select GENERIC_IRQ_SHOW select USE_GENERIC_SMP_HELPERS if SMP select GENERIC_PCI_IOMAP + select HAVE_NMI_WATCHDOG if SPARC64 config SPARC32 def_bool !64BIT diff --git a/arch/sparc/include/asm/irq_64.h b/arch/sparc/include/asm/irq_64.h index 16dcae6d..abf6afe 100644 --- a/arch/sparc/include/asm/irq_64.h +++ b/arch/sparc/include/asm/irq_64.h @@ -95,7 +95,6 @@ void arch_trigger_all_cpu_backtrace(void); extern void *hardirq_stack[NR_CPUS]; extern void *softirq_stack[NR_CPUS]; #define __ARCH_HAS_DO_SOFTIRQ -#define ARCH_HAS_NMI_WATCHDOG #define NO_IRQ 0xffffffff diff --git a/include/linux/nmi.h b/include/linux/nmi.h index 2d304ef..db50840 100644 --- a/include/linux/nmi.h +++ b/include/linux/nmi.h @@ -14,7 +14,7 @@ * may be used to reset the timeout - for code which intentionally * disables interrupts for a long time. This call is stateless. */ -#if defined(ARCH_HAS_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) +#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) #include extern void touch_nmi_watchdog(void); #else diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 05037dc..391003f 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -184,7 +184,7 @@ config LOCKUP_DETECTOR config HARDLOCKUP_DETECTOR def_bool LOCKUP_DETECTOR && PERF_EVENTS && HAVE_PERF_EVENTS_NMI && \ - !ARCH_HAS_NMI_WATCHDOG + !HAVE_NMI_WATCHDOG config BOOTPARAM_HARDLOCKUP_PANIC bool "Panic (Reboot) On Hard Lockups" -- cgit v0.10.2 From 10db4e1e4e9a910a26b94045660e5ba7e7c71419 Mon Sep 17 00:00:00 2001 From: Bobby Powers Date: Fri, 23 Mar 2012 15:01:51 -0700 Subject: headers: include linux/types.h where appropriate This addresses some header check warnings. DRM headers which include "drm.h" have been excluded, as they indirectly include types.h. Signed-off-by: Bobby Powers Cc: Chris Ball Cc: Dave Airlie Cc: James Bottomley Cc: Takashi Iwai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h index 2a2acda..4a0aae3 100644 --- a/include/drm/drm_mode.h +++ b/include/drm/drm_mode.h @@ -27,6 +27,8 @@ #ifndef _DRM_MODE_H #define _DRM_MODE_H +#include + #define DRM_DISPLAY_INFO_LEN 32 #define DRM_CONNECTOR_NAME_LEN 32 #define DRM_DISPLAY_MODE_LEN 32 diff --git a/include/linux/mmc/ioctl.h b/include/linux/mmc/ioctl.h index 8fa5bc5..1f5e689 100644 --- a/include/linux/mmc/ioctl.h +++ b/include/linux/mmc/ioctl.h @@ -1,5 +1,8 @@ #ifndef LINUX_MMC_IOCTL_H #define LINUX_MMC_IOCTL_H + +#include + struct mmc_ioc_cmd { /* Implies direction of data. true = write, false = read */ int write_flag; diff --git a/include/scsi/scsi_netlink.h b/include/scsi/scsi_netlink.h index 58ce8fe..5cb20cc 100644 --- a/include/scsi/scsi_netlink.h +++ b/include/scsi/scsi_netlink.h @@ -23,7 +23,7 @@ #define SCSI_NETLINK_H #include - +#include /* * This file intended to be included by both kernel and user space diff --git a/include/sound/compress_params.h b/include/sound/compress_params.h index d97d69f..da4a456 100644 --- a/include/sound/compress_params.h +++ b/include/sound/compress_params.h @@ -51,6 +51,8 @@ #ifndef __SND_COMPRESS_PARAMS_H #define __SND_COMPRESS_PARAMS_H +#include + /* AUDIO CODECS SUPPORTED */ #define MAX_NUM_CODECS 32 #define MAX_NUM_CODEC_DESCRIPTORS 32 -- cgit v0.10.2 From 7ccaba5314caf3a2b1052edb3146ccc969b4d466 Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Fri, 23 Mar 2012 15:01:52 -0700 Subject: consolidate WARN_...ONCE() static variables Due to the alignment of following variables, these typically consume more than just the single byte that 'bool' requires, and as there are a few hundred instances, the cache pollution (not so much the waste of memory) sums up. Put these variables into their own section, outside of any half way frequently used memory range. Do the same also to the __warned variable of rcu_lockdep_assert(). (Don't, however, include the ones used by printk_once() and alike, as they can potentially be hot.) Signed-off-by: Jan Beulich Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 84458b0..2520a6e 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -134,7 +134,7 @@ extern void warn_slowpath_null(const char *file, const int line); #endif #define WARN_ON_ONCE(condition) ({ \ - static bool __warned; \ + static bool __section(.data.unlikely) __warned; \ int __ret_warn_once = !!(condition); \ \ if (unlikely(__ret_warn_once)) \ @@ -144,7 +144,7 @@ extern void warn_slowpath_null(const char *file, const int line); }) #define WARN_ONCE(condition, format...) ({ \ - static bool __warned; \ + static bool __section(.data.unlikely) __warned; \ int __ret_warn_once = !!(condition); \ \ if (unlikely(__ret_warn_once)) \ @@ -154,7 +154,7 @@ extern void warn_slowpath_null(const char *file, const int line); }) #define WARN_TAINT_ONCE(condition, taint, format...) ({ \ - static bool __warned; \ + static bool __section(.data.unlikely) __warned; \ int __ret_warn_once = !!(condition); \ \ if (unlikely(__ret_warn_once)) \ diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index b5e2e4c..798603e 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -167,6 +167,7 @@ CPU_KEEP(exit.data) \ MEM_KEEP(init.data) \ MEM_KEEP(exit.data) \ + *(.data.unlikely) \ STRUCT_ALIGN(); \ *(__tracepoints) \ /* implement dynamic printk debug */ \ diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 9372174..2c62594 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -418,7 +418,7 @@ extern int rcu_my_thread_group_empty(void); */ #define rcu_lockdep_assert(c, s) \ do { \ - static bool __warned; \ + static bool __section(.data.unlikely) __warned; \ if (debug_lockdep_rcu_enabled() && !__warned && !(c)) { \ __warned = true; \ lockdep_rcu_suspicious(__FILE__, __LINE__, s); \ -- cgit v0.10.2 From 03ff3efb64c8a64cb8cdf35e36bead5c78eb3024 Mon Sep 17 00:00:00 2001 From: Javi Merino Date: Fri, 23 Mar 2012 15:01:52 -0700 Subject: Remove remaining bits of io_remap_page_range() Commit 33bf56106d9b ("feature removal of io_remap_page_range()") removed io_remap_page_range(), but it is still included in some arch header files. It has no in-tree users. Signed-off-by: Javi Merino Cc: Russell King Cc: Aurelien Jacquiot Cc: Michal Simek Cc: Jonas Bonn Cc: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/arm/include/asm/pgtable-nommu.h b/arch/arm/include/asm/pgtable-nommu.h index ffc0e857..7ec60d6 100644 --- a/arch/arm/include/asm/pgtable-nommu.h +++ b/arch/arm/include/asm/pgtable-nommu.h @@ -79,7 +79,6 @@ extern unsigned int kobjsize(const void *objp); * No page table caches to initialise. */ #define pgtable_cache_init() do { } while (0) -#define io_remap_page_range remap_page_range #define io_remap_pfn_range remap_pfn_range diff --git a/arch/c6x/include/asm/pgtable.h b/arch/c6x/include/asm/pgtable.h index 68c8af4..38a4312 100644 --- a/arch/c6x/include/asm/pgtable.h +++ b/arch/c6x/include/asm/pgtable.h @@ -73,9 +73,6 @@ extern unsigned long empty_zero_page; #define pgtable_cache_init() do { } while (0) #define io_remap_pfn_range remap_pfn_range -#define io_remap_page_range(vma, vaddr, paddr, size, prot) \ - remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot) - #include #endif /* _ASM_C6X_PGTABLE_H */ diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h index b2af423..44dc67a 100644 --- a/arch/microblaze/include/asm/pgtable.h +++ b/arch/microblaze/include/asm/pgtable.h @@ -543,8 +543,6 @@ extern unsigned long iopa(unsigned long addr); /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ #define kern_addr_valid(addr) (1) -#define io_remap_page_range remap_page_range - /* * No page table caches to initialise */ diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h index 043505d..14c900c 100644 --- a/arch/openrisc/include/asm/pgtable.h +++ b/arch/openrisc/include/asm/pgtable.h @@ -455,7 +455,6 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, * No page table caches to initialise */ #define pgtable_cache_init() do { } while (0) -#define io_remap_page_range remap_page_range typedef pte_t *pte_addr_t; -- cgit v0.10.2 From 9710a78e55fe29fa2d2f1a9cbd1d399797585fd9 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Fri, 23 Mar 2012 15:01:53 -0700 Subject: fs/notify/notification.c: make subsys_initcall function static Signed-off-by: H Hartley Sweeten Cc: Eric Dumazet Cc: Mike Frysinger Cc: Arun Sharma Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/notify/notification.c b/fs/notify/notification.c index ee18815..c887b13 100644 --- a/fs/notify/notification.c +++ b/fs/notify/notification.c @@ -447,7 +447,7 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask, return event; } -__init int fsnotify_notification_init(void) +static __init int fsnotify_notification_init(void) { fsnotify_event_cachep = KMEM_CACHE(fsnotify_event, SLAB_PANIC); fsnotify_event_holder_cachep = KMEM_CACHE(fsnotify_event_holder, SLAB_PANIC); @@ -461,4 +461,3 @@ __init int fsnotify_notification_init(void) return 0; } subsys_initcall(fsnotify_notification_init); - -- cgit v0.10.2 From 953326cb60c1dff1bd3458d6468d16d75f2bcd61 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Fri, 23 Mar 2012 15:01:53 -0700 Subject: drivers/staging/telephony/ixj.c: fix warning about sequence points MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In the statement j->caplist[j->caps].handle = j->caps++; there is no sequence point between the usage of j->caps on the LHS of the assignment and the incrementation on its RHS. So it's not defined in Standard C if j->caps is already incremented when used on the LHS even though the postfix ++ operator is used. To properly fix that the incrementation has to be done in a separate expression. This fixes: drivers/telephony/ixj.c: In function `add_caps': drivers/telephony/ixj.c:5930:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:5950:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:5954:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:5965:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:5976:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:5988:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:5998:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6003:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6008:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6013:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6019:38: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6026:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6031:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6036:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6041:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6049:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6057:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6065:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] drivers/telephony/ixj.c:6071:39: warning: operation on `j->caps' may be undefined [-Wsequence-point] Signed-off-by: Uwe Kleine-König Cc: Lucas De Marchi Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/staging/telephony/ixj.c b/drivers/staging/telephony/ixj.c index d5f923b..f960279 100644 --- a/drivers/staging/telephony/ixj.c +++ b/drivers/staging/telephony/ixj.c @@ -5927,7 +5927,8 @@ static void add_caps(IXJ *j) j->caplist[j->caps].cap = PHONE_VENDOR_QUICKNET; strcpy(j->caplist[j->caps].desc, "Quicknet Technologies, Inc. (www.quicknet.net)"); j->caplist[j->caps].captype = vendor; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; j->caplist[j->caps].captype = device; switch (j->cardtype) { case QTI_PHONEJACK: @@ -5947,11 +5948,13 @@ static void add_caps(IXJ *j) break; } j->caplist[j->caps].cap = j->cardtype; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; strcpy(j->caplist[j->caps].desc, "POTS"); j->caplist[j->caps].captype = port; j->caplist[j->caps].cap = pots; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; /* add devices that can do speaker/mic */ switch (j->cardtype) { @@ -5962,7 +5965,8 @@ static void add_caps(IXJ *j) strcpy(j->caplist[j->caps].desc, "SPEAKER"); j->caplist[j->caps].captype = port; j->caplist[j->caps].cap = speaker; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; default: break; } @@ -5973,7 +5977,8 @@ static void add_caps(IXJ *j) strcpy(j->caplist[j->caps].desc, "HANDSET"); j->caplist[j->caps].captype = port; j->caplist[j->caps].cap = handset; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; break; default: break; @@ -5985,7 +5990,8 @@ static void add_caps(IXJ *j) strcpy(j->caplist[j->caps].desc, "PSTN"); j->caplist[j->caps].captype = port; j->caplist[j->caps].cap = pstn; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; break; default: break; @@ -5995,50 +6001,59 @@ static void add_caps(IXJ *j) strcpy(j->caplist[j->caps].desc, "ULAW"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = ULAW; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; strcpy(j->caplist[j->caps].desc, "LINEAR 16 bit"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = LINEAR16; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; strcpy(j->caplist[j->caps].desc, "LINEAR 8 bit"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = LINEAR8; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; strcpy(j->caplist[j->caps].desc, "Windows Sound System"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = WSS; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; /* software ALAW codec, made from ULAW */ strcpy(j->caplist[j->caps].desc, "ALAW"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = ALAW; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; /* version 12 of the 8020 does the following codecs in a broken way */ if (j->dsp.low != 0x20 || j->ver.low != 0x12) { strcpy(j->caplist[j->caps].desc, "G.723.1 6.3kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = G723_63; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; strcpy(j->caplist[j->caps].desc, "G.723.1 5.3kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = G723_53; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; strcpy(j->caplist[j->caps].desc, "TrueSpeech 4.8kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = TS48; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; strcpy(j->caplist[j->caps].desc, "TrueSpeech 4.1kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = TS41; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; } /* 8020 chips can do TS8.5 native, and 8021/8022 can load it */ @@ -6046,7 +6061,8 @@ static void add_caps(IXJ *j) strcpy(j->caplist[j->caps].desc, "TrueSpeech 8.5kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = TS85; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; } /* 8021 chips can do G728 */ @@ -6054,7 +6070,8 @@ static void add_caps(IXJ *j) strcpy(j->caplist[j->caps].desc, "G.728 16kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = G728; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; } /* 8021/8022 chips can do G729 if loaded */ @@ -6062,13 +6079,15 @@ static void add_caps(IXJ *j) strcpy(j->caplist[j->caps].desc, "G.729A 8kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = G729; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; } if (j->dsp.low != 0x20 && j->flags.g729_loaded) { strcpy(j->caplist[j->caps].desc, "G.729B 8kbps"); j->caplist[j->caps].captype = codec; j->caplist[j->caps].cap = G729B; - j->caplist[j->caps].handle = j->caps++; + j->caplist[j->caps].handle = j->caps; + j->caps++; } } -- cgit v0.10.2 From ebec18a6d3aa1e7d84aab16225e87fd25170ec2b Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Fri, 23 Mar 2012 15:01:54 -0700 Subject: prctl: add PR_{SET,GET}_CHILD_SUBREAPER to allow simple process supervision Userspace service managers/supervisors need to track their started services. Many services daemonize by double-forking and get implicitly re-parented to PID 1. The service manager will no longer be able to receive the SIGCHLD signals for them, and is no longer in charge of reaping the children with wait(). All information about the children is lost at the moment PID 1 cleans up the re-parented processes. With this prctl, a service manager process can mark itself as a sort of 'sub-init', able to stay as the parent for all orphaned processes created by the started services. All SIGCHLD signals will be delivered to the service manager. Receiving SIGCHLD and doing wait() is in cases of a service-manager much preferred over any possible asynchronous notification about specific PIDs, because the service manager has full access to the child process data in /proc and the PID can not be re-used until the wait(), the service-manager itself is in charge of, has happened. As a side effect, the relevant parent PID information does not get lost by a double-fork, which results in a more elaborate process tree and 'ps' output: before: # ps afx 253 ? Ss 0:00 /bin/dbus-daemon --system --nofork 294 ? Sl 0:00 /usr/libexec/polkit-1/polkitd 328 ? S 0:00 /usr/sbin/modem-manager 608 ? Sl 0:00 /usr/libexec/colord 658 ? Sl 0:00 /usr/libexec/upowerd 819 ? Sl 0:00 /usr/libexec/imsettings-daemon 916 ? Sl 0:00 /usr/libexec/udisks-daemon 917 ? S 0:00 \_ udisks-daemon: not polling any devices after: # ps afx 294 ? Ss 0:00 /bin/dbus-daemon --system --nofork 426 ? Sl 0:00 \_ /usr/libexec/polkit-1/polkitd 449 ? S 0:00 \_ /usr/sbin/modem-manager 635 ? Sl 0:00 \_ /usr/libexec/colord 705 ? Sl 0:00 \_ /usr/libexec/upowerd 959 ? Sl 0:00 \_ /usr/libexec/udisks-daemon 960 ? S 0:00 | \_ udisks-daemon: not polling any devices 977 ? Sl 0:00 \_ /usr/libexec/packagekitd This prctl is orthogonal to PID namespaces. PID namespaces are isolated from each other, while a service management process usually requires the services to live in the same namespace, to be able to talk to each other. Users of this will be the systemd per-user instance, which provides init-like functionality for the user's login session and D-Bus, which activates bus services on-demand. Both need init-like capabilities to be able to properly keep track of the services they start. Many thanks to Oleg for several rounds of review and insights. [akpm@linux-foundation.org: fix comment layout and spelling] [akpm@linux-foundation.org: add lengthy code comment from Oleg] Reviewed-by: Oleg Nesterov Signed-off-by: Lennart Poettering Signed-off-by: Kay Sievers Acked-by: Valdis Kletnieks Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/prctl.h b/include/linux/prctl.h index a0413ac..e0cfec2 100644 --- a/include/linux/prctl.h +++ b/include/linux/prctl.h @@ -121,4 +121,7 @@ #define PR_SET_PTRACER 0x59616d61 # define PR_SET_PTRACER_ANY ((unsigned long)-1) +#define PR_SET_CHILD_SUBREAPER 36 +#define PR_GET_CHILD_SUBREAPER 37 + #endif /* _LINUX_PRCTL_H */ diff --git a/include/linux/sched.h b/include/linux/sched.h index 0c147a4..0c3854b 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -553,6 +553,18 @@ struct signal_struct { int group_stop_count; unsigned int flags; /* see SIGNAL_* flags below */ + /* + * PR_SET_CHILD_SUBREAPER marks a process, like a service + * manager, to re-parent orphan (double-forking) child processes + * to this process instead of 'init'. The service manager is + * able to receive SIGCHLD signals and is able to investigate + * the process until it calls wait(). All children of this + * process will inherit a flag if they should look for a + * child_subreaper process at exit. + */ + unsigned int is_child_subreaper:1; + unsigned int has_child_subreaper:1; + /* POSIX.1b Interval Timers */ struct list_head posix_timers; diff --git a/kernel/exit.c b/kernel/exit.c index 16b07bf..456329f 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -687,11 +687,11 @@ static void exit_mm(struct task_struct * tsk) } /* - * When we die, we re-parent all our children. - * Try to give them to another thread in our thread - * group, and if no such member exists, give it to - * the child reaper process (ie "init") in our pid - * space. + * When we die, we re-parent all our children, and try to: + * 1. give them to another thread in our thread group, if such a member exists + * 2. give it to the first ancestor process which prctl'd itself as a + * child_subreaper for its children (like a service manager) + * 3. give it to the init process (PID 1) in our pid namespace */ static struct task_struct *find_new_reaper(struct task_struct *father) __releases(&tasklist_lock) @@ -722,6 +722,29 @@ static struct task_struct *find_new_reaper(struct task_struct *father) * forget_original_parent() must move them somewhere. */ pid_ns->child_reaper = init_pid_ns.child_reaper; + } else if (father->signal->has_child_subreaper) { + struct task_struct *reaper; + + /* + * Find the first ancestor marked as child_subreaper. + * Note that the code below checks same_thread_group(reaper, + * pid_ns->child_reaper). This is what we need to DTRT in a + * PID namespace. However we still need the check above, see + * http://marc.info/?l=linux-kernel&m=131385460420380 + */ + for (reaper = father->real_parent; + reaper != &init_task; + reaper = reaper->real_parent) { + if (same_thread_group(reaper, pid_ns->child_reaper)) + break; + if (!reaper->signal->is_child_subreaper) + continue; + thread = reaper; + do { + if (!(thread->flags & PF_EXITING)) + return reaper; + } while_each_thread(reaper, thread); + } } return pid_ns->child_reaper; diff --git a/kernel/fork.c b/kernel/fork.c index 37674ec..b9372a0 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1051,6 +1051,9 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) sig->oom_score_adj = current->signal->oom_score_adj; sig->oom_score_adj_min = current->signal->oom_score_adj_min; + sig->has_child_subreaper = current->signal->has_child_subreaper || + current->signal->is_child_subreaper; + mutex_init(&sig->cred_guard_mutex); return 0; diff --git a/kernel/sys.c b/kernel/sys.c index 888d227..9eb7fca 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1962,6 +1962,14 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, case PR_SET_MM: error = prctl_set_mm(arg2, arg3, arg4, arg5); break; + case PR_SET_CHILD_SUBREAPER: + me->signal->is_child_subreaper = !!arg2; + error = 0; + break; + case PR_GET_CHILD_SUBREAPER: + error = put_user(me->signal->is_child_subreaper, + (int __user *) arg2); + break; default: error = -EINVAL; break; -- cgit v0.10.2 From 397a21f24d455982a8a6f9bc11b5f3326ce3c6ef Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 23 Mar 2012 15:01:54 -0700 Subject: kernel/exit.c: if init dies, log a signal which killed it, if any I just received another user's pleas for help when their init mysteriously died. I again explained that they need to check whether it died because of bad instruction, a segv, or something else. Which was an annoying detour into writing a trivial C program to spawn his init and print its exit code: http://lists.busybox.net/pipermail/busybox/2012-January/077172.html I hear you saying "just test it under /bin/sh". Well, the crashing init _was_ /bin/sh. Which prompted me to make kernel do this first step automatically. We can print exit code, which makes it possible to see that death was from e.g. SIGILL without writing test programs. [akpm@linux-foundation.org: add 0x to hex number output] Signed-off-by: Denys Vlasenko Acked-by: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/exit.c b/kernel/exit.c index 456329f..3db1909 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -711,8 +711,11 @@ static struct task_struct *find_new_reaper(struct task_struct *father) if (unlikely(pid_ns->child_reaper == father)) { write_unlock_irq(&tasklist_lock); - if (unlikely(pid_ns == &init_pid_ns)) - panic("Attempted to kill init!"); + if (unlikely(pid_ns == &init_pid_ns)) { + panic("Attempted to kill init! exitcode=0x%08x\n", + father->signal->group_exit_code ?: + father->exit_code); + } zap_pid_ns_processes(pid_ns); write_lock_irq(&tasklist_lock); -- cgit v0.10.2 From 7a05c0f7bbae91d08b7d0acf016fdb42dbc912ae Mon Sep 17 00:00:00 2001 From: Michal Hocko Date: Fri, 23 Mar 2012 15:01:55 -0700 Subject: watchdog: make sure the watchdog thread gets CPU on loaded system If the system is loaded while hotplugging a CPU we might end up with a bogus hardlockup detection. This has been seen during LTP pounder test executed in parallel with hotplug test. The main problem is that enable_watchdog (called when CPU is brought up) registers perf event which periodically checks per-cpu counter (hrtimer_interrupts), updated from a hrtimer callback, but the hrtimer is fired from the kernel thread. This means that while we already do check for the hard lockup the kernel thread might be sitting on the runqueue with zillions of tasks so there is nobody to update the value we rely on and so we KABOOM. Let's fix this by boosting the watchdog thread priority before we wake it up rather than when it's already running. This still doesn't handle a case where we have the same amount of high prio FIFO tasks but that doesn't seem to be common. The current implementation doesn't handle that case anyway so this is not worse at least. Unfortunately, we cannot start perf counter from the watchdog thread because we could miss a real lock up and also we cannot start the hrtimer watchdog_enable because we there is no way (at least I don't know any) to start a hrtimer from a different CPU. [dzickus@redhat.com: fix compile issue with param] Cc: Ingo Molnar Cc: Peter Zijlstra Reviewed-by: Mandeep Singh Baines Signed-off-by: Michal Hocko Signed-off-by: Don Zickus Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 14bc092..203fc6e 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -319,11 +319,9 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer) */ static int watchdog(void *unused) { - struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; + struct sched_param param = { .sched_priority = 0 }; struct hrtimer *hrtimer = &__raw_get_cpu_var(watchdog_hrtimer); - sched_setscheduler(current, SCHED_FIFO, ¶m); - /* initialize timestamp */ __touch_watchdog(); @@ -350,7 +348,6 @@ static int watchdog(void *unused) set_current_state(TASK_INTERRUPTIBLE); } __set_current_state(TASK_RUNNING); - param.sched_priority = 0; sched_setscheduler(current, SCHED_NORMAL, ¶m); return 0; } @@ -439,6 +436,7 @@ static int watchdog_enable(int cpu) /* create the watchdog thread */ if (!p) { + struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; p = kthread_create_on_node(watchdog, NULL, cpu_to_node(cpu), "watchdog/%d", cpu); if (IS_ERR(p)) { printk(KERN_ERR "softlockup watchdog for %i failed\n", cpu); @@ -450,6 +448,7 @@ static int watchdog_enable(int cpu) } goto out; } + sched_setscheduler(p, SCHED_FIFO, ¶m); kthread_bind(p, cpu); per_cpu(watchdog_touch_ts, cpu) = 0; per_cpu(softlockup_watchdog, cpu) = p; -- cgit v0.10.2 From 4501980aae221ed8120dee3491f799ecd75187ad Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 23 Mar 2012 15:01:55 -0700 Subject: kernel/watchdog.c: convert to pr_foo() It fixes some 80-col wordwrappings and adds some consistency. Cc: Ingo Molnar Cc: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 203fc6e..a01cb03 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -9,6 +9,8 @@ * to those contributors as well. */ +#define pr_fmt(fmt) "NMI watchdog: " fmt + #include #include #include @@ -373,18 +375,20 @@ static int watchdog_nmi_enable(int cpu) /* Try to register using hardware perf events */ event = perf_event_create_kernel_counter(wd_attr, cpu, NULL, watchdog_overflow_callback, NULL); if (!IS_ERR(event)) { - printk(KERN_INFO "NMI watchdog enabled, takes one hw-pmu counter.\n"); + pr_info("enabled, takes one hw-pmu counter.\n"); goto out_save; } /* vary the KERN level based on the returned errno */ if (PTR_ERR(event) == -EOPNOTSUPP) - printk(KERN_INFO "NMI watchdog disabled (cpu%i): not supported (no LAPIC?)\n", cpu); + pr_info("disabled (cpu%i): not supported (no LAPIC?)\n", cpu); else if (PTR_ERR(event) == -ENOENT) - printk(KERN_WARNING "NMI watchdog disabled (cpu%i): hardware events not enabled\n", cpu); + pr_warning("disabled (cpu%i): hardware events not enabled\n", + cpu); else - printk(KERN_ERR "NMI watchdog disabled (cpu%i): unable to create perf event: %ld\n", cpu, PTR_ERR(event)); + pr_err("disabled (cpu%i): unable to create perf event: %ld\n", + cpu, PTR_ERR(event)); return PTR_ERR(event); /* success path */ @@ -439,7 +443,7 @@ static int watchdog_enable(int cpu) struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; p = kthread_create_on_node(watchdog, NULL, cpu_to_node(cpu), "watchdog/%d", cpu); if (IS_ERR(p)) { - printk(KERN_ERR "softlockup watchdog for %i failed\n", cpu); + pr_err("softlockup watchdog for %i failed\n", cpu); if (!err) { /* if hardlockup hasn't already set this */ err = PTR_ERR(p); @@ -495,7 +499,7 @@ static void watchdog_enable_all_cpus(void) watchdog_enabled = 1; if (!watchdog_enabled) - printk(KERN_ERR "watchdog: failed to be enabled on some cpus\n"); + pr_err("failed to be enabled on some cpus\n"); } -- cgit v0.10.2 From b60f796c4ca72545327a069f12938360d833cce7 Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 23 Mar 2012 15:01:56 -0700 Subject: kernel/watchdog.c: add comment to watchdog() exit path Revelation from Peter. Cc: Peter Zijlstra Cc: Don Zickus Cc: Ingo Molnar Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/watchdog.c b/kernel/watchdog.c index a01cb03..df30ee0 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -349,6 +349,10 @@ static int watchdog(void *unused) set_current_state(TASK_INTERRUPTIBLE); } + /* + * Drop the policy/priority elevation during thread exit to avoid a + * scheduling latency spike. + */ __set_current_state(TASK_RUNNING); sched_setscheduler(current, SCHED_NORMAL, ¶m); return 0; -- cgit v0.10.2 From 0ede27450716dda82474023d6726ab50f2751adb Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:01:56 -0700 Subject: get_maintainer: use a default "unknown" S: status/role When an "S:" status line is unavailable, use a default "unknown" role. Signed-off-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl index f32a04c..f5b1f3a 100755 --- a/scripts/get_maintainer.pl +++ b/scripts/get_maintainer.pl @@ -931,7 +931,7 @@ sub get_maintainer_role { my $start = find_starting_index($index); my $end = find_ending_index($index); - my $role; + my $role = "unknown"; my $subsystem = $typevalue[$start]; if (length($subsystem) > 20) { $subsystem = substr($subsystem, 0, 17); -- cgit v0.10.2 From 728f5a94a1e1895e87dd802cb5cafaeec7e699e8 Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Fri, 23 Mar 2012 15:01:56 -0700 Subject: get_maintainer.pl: add support for moderated lists Currently get_maintainer.pl reports moderated lists as open, which is just wrong. Signed-off-by: Richard Weinberger Acked-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl index f5b1f3a..0948c6b 100755 --- a/scripts/get_maintainer.pl +++ b/scripts/get_maintainer.pl @@ -1027,8 +1027,13 @@ sub add_categories { if ($email_list) { if (!$hash_list_to{lc($list_address)}) { $hash_list_to{lc($list_address)} = 1; - push(@list_to, [$list_address, - "open list${list_role}"]); + if ($list_additional =~ m/moderated/) { + push(@list_to, [$list_address, + "moderated list${list_role}"]); + } else { + push(@list_to, [$list_address, + "open list${list_role}"]); + } } } } -- cgit v0.10.2 From 8631d86fc4f15e8b456dfccde32d6ba97b075f83 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:01:57 -0700 Subject: MAINTAINERS: update MCA section The MCA section included a file referring to Machine Check rather than Microchannel. Rename the section to spell out Microchannel and drop the bad file reference. Reported-by: Greg Pearson Signed-off-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/MAINTAINERS b/MAINTAINERS index 95eba31..6cb07e4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4416,6 +4416,13 @@ T: git git://git.monstr.eu/linux-2.6-microblaze.git S: Supported F: arch/microblaze/ +MICROCHANNEL ARCHITECTURE (MCA) +M: James Bottomley +S: Maintained +F: Documentation/mca.txt +F: drivers/mca/ +F: include/linux/mca* + MICROTEK X6 SCANNER M: Oliver Neukum S: Maintained @@ -4431,14 +4438,6 @@ S: Supported F: Documentation/mips/ F: arch/mips/ -MISCELLANEOUS MCA-SUPPORT -M: James Bottomley -S: Maintained -F: Documentation/ia64/mca.txt -F: Documentation/mca.txt -F: drivers/mca/ -F: include/linux/mca* - MODULE SUPPORT M: Rusty Russell S: Maintained -- cgit v0.10.2 From 08deed1ef62d7ff8b296e11dcdb6b09bf8a443f6 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:01:57 -0700 Subject: MAINTAINERS: update git urls for 2.6 deletions Update the various git urls for name changes from 2.6. Signed-off-by: Joe Perches Reviewed-by: Jesper Juhl Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/MAINTAINERS b/MAINTAINERS index 6cb07e4..9e0d050 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -163,7 +163,7 @@ M: Greg Kroah-Hartman L: linux-serial@vger.kernel.org W: http://serial.sourceforge.net S: Maintained -T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git F: drivers/tty/serial/8250* F: include/linux/serial_8250.h @@ -1502,7 +1502,7 @@ F: drivers/i2c/busses/i2c-bfin-twi.c BLOCK LAYER M: Jens Axboe -T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-2.6-block.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git S: Maintained F: block/ @@ -1640,7 +1640,7 @@ BTTV VIDEO4LINUX DRIVER M: Mauro Carvalho Chehab L: linux-media@vger.kernel.org W: http://linuxtv.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: Documentation/video4linux/bttv/ F: drivers/media/video/bt8xx/bttv* @@ -1670,7 +1670,7 @@ F: fs/cachefiles/ CAFE CMOS INTEGRATED CAMERA CONTROLLER DRIVER M: Jonathan Corbet L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: Documentation/video4linux/cafe_ccic F: drivers/media/video/marvell-ccic/ @@ -2036,7 +2036,7 @@ CX18 VIDEO4LINUX DRIVER M: Andy Walls L: ivtv-devel@ivtvdriver.org (moderated for non-subscribers) L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://linuxtv.org W: http://www.ivtvdriver.org/index.php/Cx18 S: Maintained @@ -2350,7 +2350,7 @@ F: Documentation/blockdev/drbd/ DRIVER CORE, KOBJECTS, DEBUGFS AND SYSFS M: Greg Kroah-Hartman -T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git S: Supported F: Documentation/kobject.txt F: drivers/base/ @@ -2372,7 +2372,7 @@ INTEL DRM DRIVERS (excluding Poulsbo, Moorestown and derivative chipsets) M: Keith Packard L: intel-gfx@lists.freedesktop.org (subscribers-only) L: dri-devel@lists.freedesktop.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux.git S: Supported F: drivers/gpu/drm/i915 F: include/drm/i915* @@ -2966,8 +2966,8 @@ GFS2 FILE SYSTEM M: Steven Whitehouse L: cluster-devel@redhat.com W: http://sources.redhat.com/cluster/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes.git -T: git git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw.git S: Supported F: Documentation/filesystems/gfs2*.txt F: fs/gfs2/ @@ -3008,42 +3008,42 @@ F: drivers/net/ethernet/aeroflex/ GSPCA FINEPIX SUBDRIVER M: Frank Zago L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/gspca/finepix.c GSPCA GL860 SUBDRIVER M: Olivier Lorin L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/gspca/gl860/ GSPCA M5602 SUBDRIVER M: Erik Andren L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/gspca/m5602/ GSPCA PAC207 SONIXB SUBDRIVER M: Hans de Goede L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/gspca/pac207.c GSPCA SN9C20X SUBDRIVER M: Brian Johnson L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/gspca/sn9c20x.c GSPCA T613 SUBDRIVER M: Leandro Costantino L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/gspca/t613.c @@ -3051,7 +3051,7 @@ GSPCA USB WEBCAM DRIVER M: Jean-Francois Moine W: http://moinejf.free.fr L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/gspca/ @@ -3337,7 +3337,7 @@ IDE SUBSYSTEM M: "David S. Miller" L: linux-ide@vger.kernel.org Q: http://patchwork.ozlabs.org/project/linux-ide/list/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide.git S: Maintained F: Documentation/ide/ F: drivers/ide/ @@ -3449,7 +3449,7 @@ F: firmware/isci/ INTEL IDLE DRIVER M: Len Brown L: linux-pm@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git S: Supported F: drivers/idle/intel_idle.c @@ -3756,7 +3756,7 @@ IVTV VIDEO4LINUX DRIVER M: Andy Walls L: ivtv-devel@ivtvdriver.org (moderated for non-subscribers) L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://www.ivtvdriver.org S: Maintained F: Documentation/video4linux/*.ivtv @@ -3852,8 +3852,8 @@ F: fs/autofs4/ KERNEL BUILD + files below scripts/ (unless maintained elsewhere) M: Michal Marek -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6.git for-next -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6.git rc-fixes +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild.git for-next +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild.git rc-fixes L: linux-kbuild@vger.kernel.org S: Maintained F: Documentation/kbuild/ @@ -4276,7 +4276,7 @@ MAC80211 M: Johannes Berg L: linux-wireless@vger.kernel.org W: http://linuxwireless.org/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless.git S: Maintained F: Documentation/networking/mac80211-injection.txt F: include/net/mac80211.h @@ -4287,7 +4287,7 @@ M: Stefano Brivio M: Mattias Nissler L: linux-wireless@vger.kernel.org W: http://linuxwireless.org/en/developers/Documentation/mac80211/RateControl/PID -T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless.git S: Maintained F: net/mac80211/rc80211_pid* @@ -4359,7 +4359,7 @@ P: LinuxTV.org Project L: linux-media@vger.kernel.org W: http://linuxtv.org Q: http://patchwork.kernel.org/project/linux-media/list/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: Documentation/dvb/ F: Documentation/video4linux/ @@ -4645,7 +4645,7 @@ M: James Morris M: Hideaki YOSHIFUJI M: Patrick McHardy L: netdev@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git S: Maintained F: net/ipv4/ F: net/ipv6/ @@ -4661,7 +4661,7 @@ NETWORKING [WIRELESS] M: "John W. Linville" L: linux-wireless@vger.kernel.org Q: http://patchwork.kernel.org/project/linux-wireless/list/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless.git S: Maintained F: net/mac80211/ F: net/rfkill/ @@ -4674,8 +4674,8 @@ F: drivers/net/wireless/ NETWORKING DRIVERS L: netdev@vger.kernel.org W: http://www.linuxfoundation.org/en/Net -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.git -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git S: Odd Fixes F: drivers/net/ F: include/linux/if_* @@ -4891,7 +4891,7 @@ F: drivers/char/pcmcia/cm4040_cs.* OMNIVISION OV7670 SENSOR DRIVER M: Jonathan Corbet L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: drivers/media/video/ov7670.c @@ -5066,7 +5066,7 @@ M: Helge Deller L: linux-parisc@vger.kernel.org W: http://www.parisc-linux.org/ Q: http://patchwork.kernel.org/project/linux-parisc/list/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6.git S: Maintained F: arch/parisc/ F: drivers/parisc/ @@ -5122,7 +5122,7 @@ PCI SUBSYSTEM M: Jesse Barnes L: linux-pci@vger.kernel.org Q: http://patchwork.kernel.org/project/linux-pci/list/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci.git S: Supported F: Documentation/PCI/ F: drivers/pci/ @@ -5407,7 +5407,7 @@ M: Mike Isely L: pvrusb2@isely.net (subscribers-only) L: linux-media@vger.kernel.org W: http://www.isely.net/pvrusb2/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: Documentation/video4linux/README.pvrusb2 F: drivers/media/video/pvrusb2/ @@ -5573,7 +5573,7 @@ RCUTORTURE MODULE M: Josh Triplett M: "Paul E. McKenney" S: Supported -T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git F: Documentation/RCU/torture.txt F: kernel/rcutorture.c @@ -5598,7 +5598,7 @@ M: Dipankar Sarma M: "Paul E. McKenney" W: http://www.rdrop.com/users/paulmck/rclock/ S: Supported -T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git F: Documentation/RCU/ F: include/linux/rcu* F: include/linux/srcu* @@ -5752,7 +5752,7 @@ F: drivers/mmc/host/s3cmci.* SAA7146 VIDEO4LINUX-2 DRIVER M: Michael Hunold L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://www.mihu.de/linux/saa7146 S: Maintained F: drivers/media/common/saa7146* @@ -6175,7 +6175,7 @@ F: arch/ia64/sn/ SOC-CAMERA V4L2 SUBSYSTEM M: Guennadi Liakhovetski L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git S: Maintained F: include/media/v4l2* F: drivers/media/video/v4l2* @@ -6247,8 +6247,8 @@ SPARC + UltraSPARC (sparc/sparc64) M: "David S. Miller" L: sparclinux@vger.kernel.org Q: http://patchwork.ozlabs.org/project/sparclinux/list/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6.git -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next.git S: Maintained F: arch/sparc/ F: drivers/sbus/ @@ -6256,8 +6256,8 @@ F: drivers/sbus/ SPARC SERIAL DRIVERS M: "David S. Miller" L: sparclinux@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6.git -T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next.git S: Maintained F: include/linux/sunserialcore.h F: drivers/tty/serial/suncore.c @@ -6562,7 +6562,7 @@ L: linux-scsi@vger.kernel.org L: target-devel@vger.kernel.org L: http://groups.google.com/group/linux-iscsi-target-dev W: http://www.linux-iscsi.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/nab/lio-core-2.6.git master +T: git git://git.kernel.org/pub/scm/linux/kernel/git/nab/lio-core.git master S: Supported F: drivers/target/ F: include/target/ @@ -6753,7 +6753,7 @@ K: ^Subject:.*(?i)trivial TTY LAYER M: Greg Kroah-Hartman S: Supported -T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git F: drivers/tty/ F: drivers/tty/serial/serial_core.c F: include/linux/serial_core.h @@ -6921,7 +6921,7 @@ USB ET61X[12]51 DRIVER M: Luca Risolia L: linux-usb@vger.kernel.org L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://www.linux-projects.org S: Maintained F: drivers/media/video/et61x251/ @@ -7077,7 +7077,7 @@ USB SN9C1xx DRIVER M: Luca Risolia L: linux-usb@vger.kernel.org L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://www.linux-projects.org S: Maintained F: Documentation/video4linux/sn9c102.txt @@ -7087,7 +7087,7 @@ USB SUBSYSTEM M: Greg Kroah-Hartman L: linux-usb@vger.kernel.org W: http://www.linux-usb.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git S: Supported F: Documentation/usb/ F: drivers/net/usb/ @@ -7113,7 +7113,7 @@ USB VIDEO CLASS M: Laurent Pinchart L: linux-uvc-devel@lists.berlios.de (subscribers-only) L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://www.ideasonboard.org/uvc/ S: Maintained F: drivers/media/video/uvc/ @@ -7122,7 +7122,7 @@ USB W996[87]CF DRIVER M: Luca Risolia L: linux-usb@vger.kernel.org L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://www.linux-projects.org S: Maintained F: Documentation/video4linux/w9968cf.txt @@ -7151,7 +7151,7 @@ USB ZR364XX DRIVER M: Antoine Jacquet L: linux-usb@vger.kernel.org L: linux-media@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git W: http://royale.zerezo.com/zr364xx/ S: Maintained F: Documentation/video4linux/zr364xx.txt @@ -7301,7 +7301,7 @@ M: Liam Girdwood M: Mark Brown W: http://opensource.wolfsonmicro.com/node/15 W: http://www.slimlogic.co.uk/?p=48 -T: git git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/lrg/regulator.git S: Supported F: drivers/regulator/ F: include/linux/regulator/ -- cgit v0.10.2 From c89f4f9a611a5421bfa990bdefc67e06c5290fce Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:01:57 -0700 Subject: MAINTAINERS: add status to ALPHA architecture Add missing S: status line to ALPHA. Signed-off-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/MAINTAINERS b/MAINTAINERS index 9e0d050..a59884a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -464,6 +464,7 @@ ALPHA PORT M: Richard Henderson M: Ivan Kokshaysky M: Matt Turner +S: Odd Fixes L: linux-alpha@vger.kernel.org F: arch/alpha/ -- cgit v0.10.2 From 37417046b9030a2f20c4228a58aca2da475c21e1 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:01:58 -0700 Subject: MAINTAINERS: add "S: Maintained" to clkdev and clk sections Russell King seems to be maintaining these. Might as well mark them with the appropriate S: entry Signed-off-by: Joe Perches Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/MAINTAINERS b/MAINTAINERS index a59884a..9ca74cb 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -716,6 +716,7 @@ S: Maintained ARM/CLKDEV SUPPORT M: Russell King L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) +S: Maintained F: arch/arm/include/asm/clkdev.h F: drivers/clk/clkdev.c @@ -1842,6 +1843,7 @@ F: include/linux/cleancache.h CLK API M: Russell King +S: Maintained F: include/linux/clk.h CISCO FCOE HBA DRIVER -- cgit v0.10.2 From 7d1ae8a8542dfc5f7eff51f9247bbd69244e9f88 Mon Sep 17 00:00:00 2001 From: Wanlong Gao Date: Fri, 23 Mar 2012 15:01:58 -0700 Subject: MAINTAINERS: update maintainership of LTP The maintainership of LTP is out of date, so update it. Signed-off-by: Wanlong Gao Signed-off-by: Cyril Hrubis Signed-off-by: Caspar Zhang Reviewed-by: Rishikesh K Rajak Acked-by: Subrata Modak Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/MAINTAINERS b/MAINTAINERS index 9ca74cb..6995469 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4236,12 +4236,14 @@ F: Documentation/hwmon/ltc4261 F: drivers/hwmon/ltc4261.c LTP (Linux Test Project) -M: Rishikesh K Rajak -M: Garrett Cooper +M: Shubham Goyal M: Mike Frysinger -M: Subrata Modak +M: Cyril Hrubis +M: Caspar Zhang +M: Wanlong Gao L: ltp-list@lists.sourceforge.net (subscribers-only) W: http://ltp.sourceforge.net/ +T: git git://github.com/linux-test-project/ltp.git T: git git://ltp.git.sourceforge.net/gitroot/ltp/ltp-dev S: Maintained -- cgit v0.10.2 From 81ce6864444facc95ba7fe25575153425106c985 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 23 Mar 2012 15:01:59 -0700 Subject: backlight: convert backlight i2c drivers to module_i2c_driver Factor out some boilerplate code for i2c driver registration into module_i2c_driver. Signed-off-by: Axel Lin Cc: Michael Hennerich Cc: Dmitry Baryshkov Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c index 378276c..550dbf0 100644 --- a/drivers/video/backlight/adp8860_bl.c +++ b/drivers/video/backlight/adp8860_bl.c @@ -819,17 +819,7 @@ static struct i2c_driver adp8860_driver = { .id_table = adp8860_id, }; -static int __init adp8860_init(void) -{ - return i2c_add_driver(&adp8860_driver); -} -module_init(adp8860_init); - -static void __exit adp8860_exit(void) -{ - i2c_del_driver(&adp8860_driver); -} -module_exit(adp8860_exit); +module_i2c_driver(adp8860_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Michael Hennerich "); diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c index 6735059..9be58c6 100644 --- a/drivers/video/backlight/adp8870_bl.c +++ b/drivers/video/backlight/adp8870_bl.c @@ -991,17 +991,7 @@ static struct i2c_driver adp8870_driver = { .id_table = adp8870_id, }; -static int __init adp8870_init(void) -{ - return i2c_add_driver(&adp8870_driver); -} -module_init(adp8870_init); - -static void __exit adp8870_exit(void) -{ - i2c_del_driver(&adp8870_driver); -} -module_exit(adp8870_exit); +module_i2c_driver(adp8870_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Michael Hennerich "); diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c index 425a736..2b241ab 100644 --- a/drivers/video/backlight/tosa_bl.c +++ b/drivers/video/backlight/tosa_bl.c @@ -181,18 +181,7 @@ static struct i2c_driver tosa_bl_driver = { .id_table = tosa_bl_id, }; -static int __init tosa_bl_init(void) -{ - return i2c_add_driver(&tosa_bl_driver); -} - -static void __exit tosa_bl_exit(void) -{ - i2c_del_driver(&tosa_bl_driver); -} - -module_init(tosa_bl_init); -module_exit(tosa_bl_exit); +module_i2c_driver(tosa_bl_driver); MODULE_AUTHOR("Dmitry Baryshkov"); MODULE_LICENSE("GPL v2"); -- cgit v0.10.2 From 462dd83833065a6b3add3f102f4fe69efa1422e9 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 23 Mar 2012 15:01:59 -0700 Subject: backlight: convert backlight spi drivers to module_spi_driver Factor out some boilerplate code for spi driver registration into module_spi_driver. Signed-off-by: Axel Lin Acked-by: Jingoo Han Cc: Eric Miao Acked-by: Alberto Panizzo Cc: Donghwa Lee Acked-by: Marek Vasut Cc: Haavard Skinnemoen Cc: InKi Dae Cc: Dmitry Baryshkov Cc: Ben Dooks Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/ams369fg06.c b/drivers/video/backlight/ams369fg06.c index 7838a23..7bdadc7 100644 --- a/drivers/video/backlight/ams369fg06.c +++ b/drivers/video/backlight/ams369fg06.c @@ -629,18 +629,7 @@ static struct spi_driver ams369fg06_driver = { .resume = ams369fg06_resume, }; -static int __init ams369fg06_init(void) -{ - return spi_register_driver(&ams369fg06_driver); -} - -static void __exit ams369fg06_exit(void) -{ - spi_unregister_driver(&ams369fg06_driver); -} - -module_init(ams369fg06_init); -module_exit(ams369fg06_exit); +module_spi_driver(ams369fg06_driver); MODULE_AUTHOR("Jingoo Han "); MODULE_DESCRIPTION("ams369fg06 LCD Driver"); diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c index c6533ba..6dab13f 100644 --- a/drivers/video/backlight/corgi_lcd.c +++ b/drivers/video/backlight/corgi_lcd.c @@ -629,17 +629,7 @@ static struct spi_driver corgi_lcd_driver = { .resume = corgi_lcd_resume, }; -static int __init corgi_lcd_init(void) -{ - return spi_register_driver(&corgi_lcd_driver); -} -module_init(corgi_lcd_init); - -static void __exit corgi_lcd_exit(void) -{ - spi_unregister_driver(&corgi_lcd_driver); -} -module_exit(corgi_lcd_exit); +module_spi_driver(corgi_lcd_driver); MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00"); MODULE_AUTHOR("Eric Miao "); diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c index 27d1d7a..6022b67 100644 --- a/drivers/video/backlight/l4f00242t03.c +++ b/drivers/video/backlight/l4f00242t03.c @@ -274,18 +274,7 @@ static struct spi_driver l4f00242t03_driver = { .shutdown = l4f00242t03_shutdown, }; -static __init int l4f00242t03_init(void) -{ - return spi_register_driver(&l4f00242t03_driver); -} - -static __exit void l4f00242t03_exit(void) -{ - spi_unregister_driver(&l4f00242t03_driver); -} - -module_init(l4f00242t03_init); -module_exit(l4f00242t03_exit); +module_spi_driver(l4f00242t03_driver); MODULE_AUTHOR("Alberto Panizzo "); MODULE_DESCRIPTION("EPSON L4F00242T03 LCD"); diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c index 78dafc0..efd352b 100644 --- a/drivers/video/backlight/ld9040.c +++ b/drivers/video/backlight/ld9040.c @@ -856,18 +856,7 @@ static struct spi_driver ld9040_driver = { .resume = ld9040_resume, }; -static int __init ld9040_init(void) -{ - return spi_register_driver(&ld9040_driver); -} - -static void __exit ld9040_exit(void) -{ - spi_unregister_driver(&ld9040_driver); -} - -module_init(ld9040_init); -module_exit(ld9040_exit); +module_spi_driver(ld9040_driver); MODULE_AUTHOR("Donghwa Lee "); MODULE_DESCRIPTION("ld9040 LCD Driver"); diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c index 4ec78cf..4161f9e 100644 --- a/drivers/video/backlight/lms283gf05.c +++ b/drivers/video/backlight/lms283gf05.c @@ -226,18 +226,7 @@ static struct spi_driver lms283gf05_driver = { .remove = __devexit_p(lms283gf05_remove), }; -static __init int lms283gf05_init(void) -{ - return spi_register_driver(&lms283gf05_driver); -} - -static __exit void lms283gf05_exit(void) -{ - spi_unregister_driver(&lms283gf05_driver); -} - -module_init(lms283gf05_init); -module_exit(lms283gf05_exit); +module_spi_driver(lms283gf05_driver); MODULE_AUTHOR("Marek Vasut "); MODULE_DESCRIPTION("LCD283GF05 LCD"); diff --git a/drivers/video/backlight/ltv350qv.c b/drivers/video/backlight/ltv350qv.c index cca43c0..333949f 100644 --- a/drivers/video/backlight/ltv350qv.c +++ b/drivers/video/backlight/ltv350qv.c @@ -321,17 +321,7 @@ static struct spi_driver ltv350qv_driver = { .resume = ltv350qv_resume, }; -static int __init ltv350qv_init(void) -{ - return spi_register_driver(<v350qv_driver); -} - -static void __exit ltv350qv_exit(void) -{ - spi_unregister_driver(<v350qv_driver); -} -module_init(ltv350qv_init); -module_exit(ltv350qv_exit); +module_spi_driver(ltv350qv_driver); MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver"); diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c index 516db70..e264f55 100644 --- a/drivers/video/backlight/s6e63m0.c +++ b/drivers/video/backlight/s6e63m0.c @@ -909,18 +909,7 @@ static struct spi_driver s6e63m0_driver = { .resume = s6e63m0_resume, }; -static int __init s6e63m0_init(void) -{ - return spi_register_driver(&s6e63m0_driver); -} - -static void __exit s6e63m0_exit(void) -{ - spi_unregister_driver(&s6e63m0_driver); -} - -module_init(s6e63m0_init); -module_exit(s6e63m0_exit); +module_spi_driver(s6e63m0_driver); MODULE_AUTHOR("InKi Dae "); MODULE_DESCRIPTION("S6E63M0 LCD Driver"); diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c index 1997e12..2368b8e 100644 --- a/drivers/video/backlight/tdo24m.c +++ b/drivers/video/backlight/tdo24m.c @@ -459,17 +459,7 @@ static struct spi_driver tdo24m_driver = { .resume = tdo24m_resume, }; -static int __init tdo24m_init(void) -{ - return spi_register_driver(&tdo24m_driver); -} -module_init(tdo24m_init); - -static void __exit tdo24m_exit(void) -{ - spi_unregister_driver(&tdo24m_driver); -} -module_exit(tdo24m_exit); +module_spi_driver(tdo24m_driver); MODULE_AUTHOR("Eric Miao "); MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel"); diff --git a/drivers/video/backlight/tosa_lcd.c b/drivers/video/backlight/tosa_lcd.c index 772f601..a2161f6 100644 --- a/drivers/video/backlight/tosa_lcd.c +++ b/drivers/video/backlight/tosa_lcd.c @@ -285,18 +285,7 @@ static struct spi_driver tosa_lcd_driver = { .resume = tosa_lcd_resume, }; -static int __init tosa_lcd_init(void) -{ - return spi_register_driver(&tosa_lcd_driver); -} - -static void __exit tosa_lcd_exit(void) -{ - spi_unregister_driver(&tosa_lcd_driver); -} - -module_init(tosa_lcd_init); -module_exit(tosa_lcd_exit); +module_spi_driver(tosa_lcd_driver); MODULE_AUTHOR("Dmitry Baryshkov"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/vgg2432a4.c b/drivers/video/backlight/vgg2432a4.c index b49063c..b617fae 100644 --- a/drivers/video/backlight/vgg2432a4.c +++ b/drivers/video/backlight/vgg2432a4.c @@ -262,20 +262,7 @@ static struct spi_driver vgg2432a4_driver = { .resume = vgg2432a4_resume, }; -/* Device driver initialisation */ - -static int __init vgg2432a4_init(void) -{ - return spi_register_driver(&vgg2432a4_driver); -} - -static void __exit vgg2432a4_exit(void) -{ - spi_unregister_driver(&vgg2432a4_driver); -} - -module_init(vgg2432a4_init); -module_exit(vgg2432a4_exit); +module_spi_driver(vgg2432a4_driver); MODULE_AUTHOR("Ben Dooks "); MODULE_DESCRIPTION("VGG2432A4 LCD Driver"); -- cgit v0.10.2 From 1107d40a50956146d1272f5cffcdf1d83f7e703e Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Fri, 23 Mar 2012 15:02:00 -0700 Subject: drivers/video/backlight/wm831x_bl.c: use devm_ functions The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. Signed-off-by: Julia Lawall Cc: Dimitris Papastamos Cc: Richard Purdie Cc: Florian Tobias Schandinat Acked-by: Mark Brown Cc: Michael Hennerich Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c index 4e915f5..5d365de 100644 --- a/drivers/video/backlight/wm831x_bl.c +++ b/drivers/video/backlight/wm831x_bl.c @@ -186,7 +186,7 @@ static int wm831x_backlight_probe(struct platform_device *pdev) if (ret < 0) return ret; - data = kzalloc(sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; @@ -200,7 +200,6 @@ static int wm831x_backlight_probe(struct platform_device *pdev) &wm831x_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } @@ -211,7 +210,6 @@ static int wm831x_backlight_probe(struct platform_device *pdev) /* Disable the DCDC if it was started so we can bootstrap */ wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0); - backlight_update_status(bl); return 0; @@ -220,10 +218,8 @@ static int wm831x_backlight_probe(struct platform_device *pdev) static int wm831x_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct wm831x_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } -- cgit v0.10.2 From ce969228fdb54a7e3d7cc1ed27367fd4b9525d74 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Fri, 23 Mar 2012 15:02:00 -0700 Subject: drivers/video/backlight: use devm_ functions The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. Signed-off-by: Julia Lawall Cc: Dimitris Papastamos Cc: Richard Purdie Cc: Florian Tobias Schandinat Cc: Mark Brown Cc: Michael Hennerich Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c index a1376dc..915943a 100644 --- a/drivers/video/backlight/88pm860x_bl.c +++ b/drivers/video/backlight/88pm860x_bl.c @@ -187,7 +187,8 @@ static int pm860x_backlight_probe(struct platform_device *pdev) return -EINVAL; } - data = kzalloc(sizeof(struct pm860x_backlight_data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_backlight_data), + GFP_KERNEL); if (data == NULL) return -ENOMEM; strncpy(name, res->name, MFD_NAME_SIZE); @@ -200,7 +201,6 @@ static int pm860x_backlight_probe(struct platform_device *pdev) data->port = pdata->flags; if (data->port < 0) { dev_err(&pdev->dev, "wrong platform data is assigned"); - kfree(data); return -EINVAL; } @@ -211,7 +211,6 @@ static int pm860x_backlight_probe(struct platform_device *pdev) &pm860x_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } bl->props.brightness = MAX_BRIGHTNESS; @@ -247,17 +246,14 @@ static int pm860x_backlight_probe(struct platform_device *pdev) return 0; out: backlight_device_unregister(bl); - kfree(data); return ret; } static int pm860x_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct pm860x_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c index 331f1ef..7ff7522 100644 --- a/drivers/video/backlight/aat2870_bl.c +++ b/drivers/video/backlight/aat2870_bl.c @@ -145,7 +145,9 @@ static int aat2870_bl_probe(struct platform_device *pdev) goto out; } - aat2870_bl = kzalloc(sizeof(struct aat2870_bl_driver_data), GFP_KERNEL); + aat2870_bl = devm_kzalloc(&pdev->dev, + sizeof(struct aat2870_bl_driver_data), + GFP_KERNEL); if (!aat2870_bl) { dev_err(&pdev->dev, "Failed to allocate memory for aat2870 backlight\n"); @@ -162,7 +164,7 @@ static int aat2870_bl_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Failed allocate memory for backlight device\n"); ret = PTR_ERR(bd); - goto out_kfree; + goto out; } aat2870_bl->pdev = pdev; @@ -199,8 +201,6 @@ static int aat2870_bl_probe(struct platform_device *pdev) out_bl_dev_unregister: backlight_device_unregister(bd); -out_kfree: - kfree(aat2870_bl); out: return ret; } @@ -215,7 +215,6 @@ static int aat2870_bl_remove(struct platform_device *pdev) backlight_update_status(bd); backlight_device_unregister(bd); - kfree(aat2870_bl); return 0; } diff --git a/drivers/video/backlight/cr_bllcd.c b/drivers/video/backlight/cr_bllcd.c index 6c8c540..22489eb 100644 --- a/drivers/video/backlight/cr_bllcd.c +++ b/drivers/video/backlight/cr_bllcd.c @@ -212,7 +212,7 @@ static int cr_backlight_probe(struct platform_device *pdev) &gpio_bar); gpio_bar &= ~0x3F; - crp = kzalloc(sizeof(*crp), GFP_KERNEL); + crp = devm_kzalloc(&pdev->dev, sizeof(*crp), GFP_KERNEL); if (!crp) { lcd_device_unregister(ldp); backlight_device_unregister(bdp); @@ -243,7 +243,6 @@ static int cr_backlight_remove(struct platform_device *pdev) backlight_device_unregister(crp->cr_backlight_device); lcd_device_unregister(crp->cr_lcd_device); pci_dev_put(lpc_dev); - kfree(crp); return 0; } diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c index abb4a06..30e1968 100644 --- a/drivers/video/backlight/da903x_bl.c +++ b/drivers/video/backlight/da903x_bl.c @@ -110,7 +110,7 @@ static int da903x_backlight_probe(struct platform_device *pdev) struct backlight_properties props; int max_brightness; - data = kzalloc(sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; @@ -124,7 +124,6 @@ static int da903x_backlight_probe(struct platform_device *pdev) default: dev_err(&pdev->dev, "invalid backlight device ID(%d)\n", pdev->id); - kfree(data); return -EINVAL; } @@ -143,7 +142,6 @@ static int da903x_backlight_probe(struct platform_device *pdev) &da903x_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } @@ -157,10 +155,8 @@ static int da903x_backlight_probe(struct platform_device *pdev) static int da903x_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct da903x_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c index c915e3b..e833ac7 100644 --- a/drivers/video/backlight/max8925_bl.c +++ b/drivers/video/backlight/max8925_bl.c @@ -129,7 +129,8 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev) return -EINVAL; } - data = kzalloc(sizeof(struct max8925_backlight_data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(struct max8925_backlight_data), + GFP_KERNEL); if (data == NULL) return -ENOMEM; strncpy(name, res->name, MAX8925_NAME_SIZE); @@ -143,7 +144,6 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev) &max8925_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } bl->props.brightness = MAX_BRIGHTNESS; @@ -165,17 +165,14 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev) return 0; out: backlight_device_unregister(bl); - kfree(data); return ret; } static int __devexit max8925_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct max8925_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c index d8cde27..0175bfb 100644 --- a/drivers/video/backlight/omap1_bl.c +++ b/drivers/video/backlight/omap1_bl.c @@ -141,7 +141,8 @@ static int omapbl_probe(struct platform_device *pdev) if (!pdata) return -ENXIO; - bl = kzalloc(sizeof(struct omap_backlight), GFP_KERNEL); + bl = devm_kzalloc(&pdev->dev, sizeof(struct omap_backlight), + GFP_KERNEL); if (unlikely(!bl)) return -ENOMEM; @@ -150,10 +151,8 @@ static int omapbl_probe(struct platform_device *pdev) props.max_brightness = OMAPBL_MAX_INTENSITY; dev = backlight_device_register("omap-bl", &pdev->dev, bl, &omapbl_ops, &props); - if (IS_ERR(dev)) { - kfree(bl); + if (IS_ERR(dev)) return PTR_ERR(dev); - } bl->powermode = FB_BLANK_POWERDOWN; bl->current_intensity = 0; @@ -177,10 +176,8 @@ static int omapbl_probe(struct platform_device *pdev) static int omapbl_remove(struct platform_device *pdev) { struct backlight_device *dev = platform_get_drvdata(pdev); - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); backlight_device_unregister(dev); - kfree(bl); return 0; } diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c index 13e88b7..c65853c 100644 --- a/drivers/video/backlight/pcf50633-backlight.c +++ b/drivers/video/backlight/pcf50633-backlight.c @@ -101,14 +101,13 @@ static const struct backlight_ops pcf50633_bl_ops = { static int __devinit pcf50633_bl_probe(struct platform_device *pdev) { - int ret; struct pcf50633_bl *pcf_bl; struct device *parent = pdev->dev.parent; struct pcf50633_platform_data *pcf50633_data = parent->platform_data; struct pcf50633_bl_platform_data *pdata = pcf50633_data->backlight_data; struct backlight_properties bl_props; - pcf_bl = kzalloc(sizeof(*pcf_bl), GFP_KERNEL); + pcf_bl = devm_kzalloc(&pdev->dev, sizeof(*pcf_bl), GFP_KERNEL); if (!pcf_bl) return -ENOMEM; @@ -129,10 +128,8 @@ static int __devinit pcf50633_bl_probe(struct platform_device *pdev) pcf_bl->bl = backlight_device_register(pdev->name, &pdev->dev, pcf_bl, &pcf50633_bl_ops, &bl_props); - if (IS_ERR(pcf_bl->bl)) { - ret = PTR_ERR(pcf_bl->bl); - goto err_free; - } + if (IS_ERR(pcf_bl->bl)) + return PTR_ERR(pcf_bl->bl); platform_set_drvdata(pdev, pcf_bl); @@ -145,11 +142,6 @@ static int __devinit pcf50633_bl_probe(struct platform_device *pdev) backlight_update_status(pcf_bl->bl); return 0; - -err_free: - kfree(pcf_bl); - - return ret; } static int __devexit pcf50633_bl_remove(struct platform_device *pdev) @@ -160,8 +152,6 @@ static int __devexit pcf50633_bl_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); - kfree(pcf_bl); - return 0; } diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 7496d04..342b7d7 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -102,7 +102,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) return ret; } - pb = kzalloc(sizeof(*pb), GFP_KERNEL); + pb = devm_kzalloc(&pdev->dev, sizeof(*pb), GFP_KERNEL); if (!pb) { dev_err(&pdev->dev, "no memory for state\n"); ret = -ENOMEM; @@ -121,7 +121,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) if (IS_ERR(pb->pwm)) { dev_err(&pdev->dev, "unable to request PWM for backlight\n"); ret = PTR_ERR(pb->pwm); - goto err_pwm; + goto err_alloc; } else dev_dbg(&pdev->dev, "got pwm for backlight\n"); @@ -144,8 +144,6 @@ static int pwm_backlight_probe(struct platform_device *pdev) err_bl: pwm_free(pb->pwm); -err_pwm: - kfree(pb); err_alloc: if (data->exit) data->exit(&pdev->dev); @@ -162,7 +160,6 @@ static int pwm_backlight_remove(struct platform_device *pdev) pwm_config(pb->pwm, 0, pb->period); pwm_disable(pb->pwm); pwm_free(pb->pwm); - kfree(pb); if (data->exit) data->exit(&pdev->dev); return 0; -- cgit v0.10.2 From 050ea48bbfc80b6aa81f8df0d9f25e6e47d96e98 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Fri, 23 Mar 2012 15:02:01 -0700 Subject: drivers/video/backlight/adp5520_bl.c: use devm_ functions The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. Signed-off-by: Julia Lawall Cc: Dimitris Papastamos Cc: Richard Purdie Cc: Florian Tobias Schandinat Cc: Mark Brown Acked-by: Michael Hennerich Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c index 2e630bf..4911ea7 100644 --- a/drivers/video/backlight/adp5520_bl.c +++ b/drivers/video/backlight/adp5520_bl.c @@ -289,7 +289,7 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) struct adp5520_bl *data; int ret = 0; - data = kzalloc(sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; @@ -298,7 +298,6 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) if (data->pdata == NULL) { dev_err(&pdev->dev, "missing platform data\n"); - kfree(data); return -ENODEV; } @@ -314,7 +313,6 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) &adp5520_bl_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } @@ -326,7 +324,6 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "failed to register sysfs\n"); backlight_device_unregister(bl); - kfree(data); } platform_set_drvdata(pdev, bl); @@ -348,7 +345,6 @@ static int __devexit adp5520_bl_remove(struct platform_device *pdev) &adp5520_bl_attr_group); backlight_device_unregister(bl); - kfree(data); return 0; } -- cgit v0.10.2 From 7be865ab8634d4ec2a6bdb9459b268cd60e832af Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:01 -0700 Subject: backlight: new backlight driver for LP855x devices THis driver supports TI LP8550/LP8551/LP8552/LP8553/LP8556 backlight devices. The brightness can be controlled by the I2C or PWM input. The lp855x driver provides both modes. For the PWM control, pwm-specific functions can be defined in the platform data. And some information can be read via the sysfs(lp855x device attributes). For details, please refer to Documentation/backlight/lp855x-driver.txt. [axel.lin@gmail.com: add missing mutex_unlock in lp855x_read_byte() error path] [axel.lin@gmail.com: check platform data in lp855x_probe()] [axel.lin@gmail.com: small cleanups] [dan.carpenter@oracle.com: silence a compiler warning] [axel.lin@gmail.com: use id->driver_data to differentiate lp855x chips] [akpm@linux-foundation.org: simplify boolean return expression] Signed-off-by: Milo(Woogyom) Kim Signed-off-by: Axel Lin Signed-off-by: Dan Carpenter Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/Documentation/backlight/lp855x-driver.txt b/Documentation/backlight/lp855x-driver.txt new file mode 100644 index 0000000..f5e4caa --- /dev/null +++ b/Documentation/backlight/lp855x-driver.txt @@ -0,0 +1,78 @@ +Kernel driver lp855x +==================== + +Backlight driver for LP855x ICs + +Supported chips: + Texas Instruments LP8550, LP8551, LP8552, LP8553 and LP8556 + +Author: Milo(Woogyom) Kim + +Description +----------- + +* Brightness control + +Brightness can be controlled by the pwm input or the i2c command. +The lp855x driver supports both cases. + +* Device attributes + +1) bl_ctl_mode +Backlight control mode. +Value : pwm based or register based + +2) chip_id +The lp855x chip id. +Value : lp8550/lp8551/lp8552/lp8553/lp8556 + +Platform data for lp855x +------------------------ + +For supporting platform specific data, the lp855x platform data can be used. + +* name : Backlight driver name. If it is not defined, default name is set. +* mode : Brightness control mode. PWM or register based. +* device_control : Value of DEVICE CONTROL register. +* initial_brightness : Initial value of backlight brightness. +* pwm_data : Platform specific pwm generation functions. + Only valid when brightness is pwm input mode. + Functions should be implemented by PWM driver. + - pwm_set_intensity() : set duty of PWM + - pwm_get_intensity() : get current duty of PWM +* load_new_rom_data : + 0 : use default configuration data + 1 : update values of eeprom or eprom registers on loading driver +* size_program : Total size of lp855x_rom_data. +* rom_data : List of new eeprom/eprom registers. + +example 1) lp8552 platform data : i2c register mode with new eeprom data + +#define EEPROM_A5_ADDR 0xA5 +#define EEPROM_A5_VAL 0x4f /* EN_VSYNC=0 */ + +static struct lp855x_rom_data lp8552_eeprom_arr[] = { + {EEPROM_A5_ADDR, EEPROM_A5_VAL}, +}; + +static struct lp855x_platform_data lp8552_pdata = { + .name = "lcd-bl", + .mode = REGISTER_BASED, + .device_control = I2C_CONFIG(LP8552), + .initial_brightness = INITIAL_BRT, + .load_new_rom_data = 1, + .size_program = ARRAY_SIZE(lp8552_eeprom_arr), + .rom_data = lp8552_eeprom_arr, +}; + +example 2) lp8556 platform data : pwm input mode with default rom data + +static struct lp855x_platform_data lp8556_pdata = { + .mode = PWM_BASED, + .device_control = PWM_CONFIG(LP8556), + .initial_brightness = INITIAL_BRT, + .pwm_data = { + .pwm_set_intensity = platform_pwm_set_intensity, + .pwm_get_intensity = platform_pwm_get_intensity, + }, +}; diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 681b369..49e7d83 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -334,6 +334,13 @@ config BACKLIGHT_AAT2870 If you have a AnalogicTech AAT2870 say Y to enable the backlight driver. +config BACKLIGHT_LP855X + tristate "Backlight driver for TI LP855X" + depends on BACKLIGHT_CLASS_DEVICE && I2C + help + This supports TI LP8550, LP8551, LP8552, LP8553 and LP8556 + backlight driver. + endif # BACKLIGHT_CLASS_DEVICE endif # BACKLIGHT_LCD_SUPPORT diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index af5cf65..0ee06e0 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o +obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c new file mode 100644 index 0000000..72a0e0c --- /dev/null +++ b/drivers/video/backlight/lp855x_bl.c @@ -0,0 +1,331 @@ +/* + * TI LP855x Backlight Driver + * + * Copyright (C) 2011 Texas Instruments + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include +#include +#include +#include +#include +#include + +/* Registers */ +#define BRIGHTNESS_CTRL (0x00) +#define DEVICE_CTRL (0x01) + +#define BUF_SIZE 20 +#define DEFAULT_BL_NAME "lcd-backlight" +#define MAX_BRIGHTNESS 255 + +struct lp855x { + const char *chipname; + enum lp855x_chip_id chip_id; + struct i2c_client *client; + struct backlight_device *bl; + struct device *dev; + struct mutex xfer_lock; + struct lp855x_platform_data *pdata; +}; + +static int lp855x_read_byte(struct lp855x *lp, u8 reg, u8 *data) +{ + int ret; + + mutex_lock(&lp->xfer_lock); + ret = i2c_smbus_read_byte_data(lp->client, reg); + if (ret < 0) { + mutex_unlock(&lp->xfer_lock); + dev_err(lp->dev, "failed to read 0x%.2x\n", reg); + return ret; + } + mutex_unlock(&lp->xfer_lock); + + *data = (u8)ret; + return 0; +} + +static int lp855x_write_byte(struct lp855x *lp, u8 reg, u8 data) +{ + int ret; + + mutex_lock(&lp->xfer_lock); + ret = i2c_smbus_write_byte_data(lp->client, reg, data); + mutex_unlock(&lp->xfer_lock); + + return ret; +} + +static bool lp855x_is_valid_rom_area(struct lp855x *lp, u8 addr) +{ + u8 start, end; + + switch (lp->chip_id) { + case LP8550: + case LP8551: + case LP8552: + case LP8553: + start = EEPROM_START; + end = EEPROM_END; + break; + case LP8556: + start = EPROM_START; + end = EPROM_END; + break; + default: + return false; + } + + return (addr >= start && addr <= end); +} + +static int lp855x_init_registers(struct lp855x *lp) +{ + u8 val, addr; + int i, ret; + struct lp855x_platform_data *pd = lp->pdata; + + val = pd->initial_brightness; + ret = lp855x_write_byte(lp, BRIGHTNESS_CTRL, val); + if (ret) + return ret; + + val = pd->device_control; + ret = lp855x_write_byte(lp, DEVICE_CTRL, val); + if (ret) + return ret; + + if (pd->load_new_rom_data && pd->size_program) { + for (i = 0; i < pd->size_program; i++) { + addr = pd->rom_data[i].addr; + val = pd->rom_data[i].val; + if (!lp855x_is_valid_rom_area(lp, addr)) + continue; + + ret = lp855x_write_byte(lp, addr, val); + if (ret) + return ret; + } + } + + return ret; +} + +static int lp855x_bl_update_status(struct backlight_device *bl) +{ + struct lp855x *lp = bl_get_data(bl); + enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode; + + if (bl->props.state & BL_CORE_SUSPENDED) + bl->props.brightness = 0; + + if (mode == PWM_BASED) { + struct lp855x_pwm_data *pd = &lp->pdata->pwm_data; + int br = bl->props.brightness; + int max_br = bl->props.max_brightness; + + if (pd->pwm_set_intensity) + pd->pwm_set_intensity(br, max_br); + + } else if (mode == REGISTER_BASED) { + u8 val = bl->props.brightness; + lp855x_write_byte(lp, BRIGHTNESS_CTRL, val); + } + + return 0; +} + +static int lp855x_bl_get_brightness(struct backlight_device *bl) +{ + struct lp855x *lp = bl_get_data(bl); + enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode; + + if (mode == PWM_BASED) { + struct lp855x_pwm_data *pd = &lp->pdata->pwm_data; + int max_br = bl->props.max_brightness; + + if (pd->pwm_get_intensity) + bl->props.brightness = pd->pwm_get_intensity(max_br); + + } else if (mode == REGISTER_BASED) { + u8 val = 0; + + lp855x_read_byte(lp, BRIGHTNESS_CTRL, &val); + bl->props.brightness = val; + } + + return bl->props.brightness; +} + +static const struct backlight_ops lp855x_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lp855x_bl_update_status, + .get_brightness = lp855x_bl_get_brightness, +}; + +static int lp855x_backlight_register(struct lp855x *lp) +{ + struct backlight_device *bl; + struct backlight_properties props; + struct lp855x_platform_data *pdata = lp->pdata; + char *name = pdata->name ? : DEFAULT_BL_NAME; + + props.type = BACKLIGHT_PLATFORM; + props.max_brightness = MAX_BRIGHTNESS; + + if (pdata->initial_brightness > props.max_brightness) + pdata->initial_brightness = props.max_brightness; + + props.brightness = pdata->initial_brightness; + + bl = backlight_device_register(name, lp->dev, lp, + &lp855x_bl_ops, &props); + if (IS_ERR(bl)) + return PTR_ERR(bl); + + lp->bl = bl; + + return 0; +} + +static void lp855x_backlight_unregister(struct lp855x *lp) +{ + if (lp->bl) + backlight_device_unregister(lp->bl); +} + +static ssize_t lp855x_get_chip_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp855x *lp = dev_get_drvdata(dev); + return scnprintf(buf, BUF_SIZE, "%s\n", lp->chipname); +} + +static ssize_t lp855x_get_bl_ctl_mode(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp855x *lp = dev_get_drvdata(dev); + enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode; + char *strmode = NULL; + + if (mode == PWM_BASED) + strmode = "pwm based"; + else if (mode == REGISTER_BASED) + strmode = "register based"; + + return scnprintf(buf, BUF_SIZE, "%s\n", strmode); +} + +static DEVICE_ATTR(chip_id, S_IRUGO, lp855x_get_chip_id, NULL); +static DEVICE_ATTR(bl_ctl_mode, S_IRUGO, lp855x_get_bl_ctl_mode, NULL); + +static struct attribute *lp855x_attributes[] = { + &dev_attr_chip_id.attr, + &dev_attr_bl_ctl_mode.attr, + NULL, +}; + +static const struct attribute_group lp855x_attr_group = { + .attrs = lp855x_attributes, +}; + +static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id) +{ + struct lp855x *lp; + struct lp855x_platform_data *pdata = cl->dev.platform_data; + enum lp855x_brightness_ctrl_mode mode; + int ret; + + if (!pdata) { + dev_err(&cl->dev, "no platform data supplied\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) + return -EIO; + + lp = devm_kzalloc(&cl->dev, sizeof(struct lp855x), GFP_KERNEL); + if (!lp) + return -ENOMEM; + + mode = pdata->mode; + lp->client = cl; + lp->dev = &cl->dev; + lp->pdata = pdata; + lp->chipname = id->name; + lp->chip_id = id->driver_data; + i2c_set_clientdata(cl, lp); + + mutex_init(&lp->xfer_lock); + + ret = lp855x_init_registers(lp); + if (ret) { + dev_err(lp->dev, "i2c communication err: %d", ret); + if (mode == REGISTER_BASED) + goto err_dev; + } + + ret = lp855x_backlight_register(lp); + if (ret) { + dev_err(lp->dev, + "failed to register backlight. err: %d\n", ret); + goto err_dev; + } + + ret = sysfs_create_group(&lp->dev->kobj, &lp855x_attr_group); + if (ret) { + dev_err(lp->dev, "failed to register sysfs. err: %d\n", ret); + goto err_sysfs; + } + + backlight_update_status(lp->bl); + return 0; + +err_sysfs: + lp855x_backlight_unregister(lp); +err_dev: + return ret; +} + +static int __devexit lp855x_remove(struct i2c_client *cl) +{ + struct lp855x *lp = i2c_get_clientdata(cl); + + lp->bl->props.brightness = 0; + backlight_update_status(lp->bl); + sysfs_remove_group(&lp->dev->kobj, &lp855x_attr_group); + lp855x_backlight_unregister(lp); + + return 0; +} + +static const struct i2c_device_id lp855x_ids[] = { + {"lp8550", LP8550}, + {"lp8551", LP8551}, + {"lp8552", LP8552}, + {"lp8553", LP8553}, + {"lp8556", LP8556}, + { } +}; +MODULE_DEVICE_TABLE(i2c, lp855x_ids); + +static struct i2c_driver lp855x_driver = { + .driver = { + .name = "lp855x", + }, + .probe = lp855x_probe, + .remove = __devexit_p(lp855x_remove), + .id_table = lp855x_ids, +}; + +module_i2c_driver(lp855x_driver); + +MODULE_DESCRIPTION("Texas Instruments LP855x Backlight driver"); +MODULE_AUTHOR("Milo Kim "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/lp855x.h b/include/linux/lp855x.h new file mode 100644 index 0000000..781a490 --- /dev/null +++ b/include/linux/lp855x.h @@ -0,0 +1,131 @@ +/* + * LP855x Backlight Driver + * + * Copyright (C) 2011 Texas Instruments + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#ifndef _LP855X_H +#define _LP855X_H + +#define BL_CTL_SHFT (0) +#define BRT_MODE_SHFT (1) +#define BRT_MODE_MASK (0x06) + +/* Enable backlight. Only valid when BRT_MODE=10(I2C only) */ +#define ENABLE_BL (1) +#define DISABLE_BL (0) + +#define I2C_CONFIG(id) id ## _I2C_CONFIG +#define PWM_CONFIG(id) id ## _PWM_CONFIG + +/* DEVICE CONTROL register - LP8550 */ +#define LP8550_PWM_CONFIG (LP8550_PWM_ONLY << BRT_MODE_SHFT) +#define LP8550_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \ + (LP8550_I2C_ONLY << BRT_MODE_SHFT)) + +/* DEVICE CONTROL register - LP8551 */ +#define LP8551_PWM_CONFIG LP8550_PWM_CONFIG +#define LP8551_I2C_CONFIG LP8550_I2C_CONFIG + +/* DEVICE CONTROL register - LP8552 */ +#define LP8552_PWM_CONFIG LP8550_PWM_CONFIG +#define LP8552_I2C_CONFIG LP8550_I2C_CONFIG + +/* DEVICE CONTROL register - LP8553 */ +#define LP8553_PWM_CONFIG LP8550_PWM_CONFIG +#define LP8553_I2C_CONFIG LP8550_I2C_CONFIG + +/* DEVICE CONTROL register - LP8556 */ +#define LP8556_PWM_CONFIG (LP8556_PWM_ONLY << BRT_MODE_SHFT) +#define LP8556_COMB1_CONFIG (LP8556_COMBINED1 << BRT_MODE_SHFT) +#define LP8556_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \ + (LP8556_I2C_ONLY << BRT_MODE_SHFT)) +#define LP8556_COMB2_CONFIG (LP8556_COMBINED2 << BRT_MODE_SHFT) + +/* ROM area boundary */ +#define EEPROM_START (0xA0) +#define EEPROM_END (0xA7) +#define EPROM_START (0xA0) +#define EPROM_END (0xAF) + +enum lp855x_chip_id { + LP8550, + LP8551, + LP8552, + LP8553, + LP8556, +}; + +enum lp855x_brightness_ctrl_mode { + PWM_BASED = 1, + REGISTER_BASED, +}; + +enum lp8550_brighntess_source { + LP8550_PWM_ONLY, + LP8550_I2C_ONLY = 2, +}; + +enum lp8551_brighntess_source { + LP8551_PWM_ONLY = LP8550_PWM_ONLY, + LP8551_I2C_ONLY = LP8550_I2C_ONLY, +}; + +enum lp8552_brighntess_source { + LP8552_PWM_ONLY = LP8550_PWM_ONLY, + LP8552_I2C_ONLY = LP8550_I2C_ONLY, +}; + +enum lp8553_brighntess_source { + LP8553_PWM_ONLY = LP8550_PWM_ONLY, + LP8553_I2C_ONLY = LP8550_I2C_ONLY, +}; + +enum lp8556_brightness_source { + LP8556_PWM_ONLY, + LP8556_COMBINED1, /* pwm + i2c before the shaper block */ + LP8556_I2C_ONLY, + LP8556_COMBINED2, /* pwm + i2c after the shaper block */ +}; + +struct lp855x_pwm_data { + void (*pwm_set_intensity) (int brightness, int max_brightness); + int (*pwm_get_intensity) (int max_brightness); +}; + +struct lp855x_rom_data { + u8 addr; + u8 val; +}; + +/** + * struct lp855x_platform_data + * @name : Backlight driver name. If it is not defined, default name is set. + * @mode : brightness control by pwm or lp855x register + * @device_control : value of DEVICE CONTROL register + * @initial_brightness : initial value of backlight brightness + * @pwm_data : platform specific pwm generation functions. + Only valid when mode is PWM_BASED. + * @load_new_rom_data : + 0 : use default configuration data + 1 : update values of eeprom or eprom registers on loading driver + * @size_program : total size of lp855x_rom_data + * @rom_data : list of new eeprom/eprom registers + */ +struct lp855x_platform_data { + char *name; + enum lp855x_brightness_ctrl_mode mode; + u8 device_control; + int initial_brightness; + struct lp855x_pwm_data pwm_data; + u8 load_new_rom_data; + int size_program; + struct lp855x_rom_data *rom_data; +}; + +#endif -- cgit v0.10.2 From c8df7428635c02ca3051e39179c83297d8b76fba Mon Sep 17 00:00:00 2001 From: Christian Gmeiner Date: Fri, 23 Mar 2012 15:02:02 -0700 Subject: backlight: add driver for Bachmann's ot200 Add backlight driver for Bachmann's ot200 visualisation device. The driver uses MFGPT 7 of CS5535 silicon to regulate the backlight. [akpm@linux-foundation.org: remove redundant test of `brightness'] Signed-off-by: Christian Gmeiner Cc: Lars-Peter Clausen Cc: Andres Salomon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 49e7d83..248d6c0 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -341,6 +341,13 @@ config BACKLIGHT_LP855X This supports TI LP8550, LP8551, LP8552, LP8553 and LP8556 backlight driver. +config BACKLIGHT_OT200 + tristate "Backlight driver for ot200 visualisation device" + depends on BACKLIGHT_CLASS_DEVICE && CS5535_MFGPT + help + To compile this driver as a module, choose M here: the module will be + called ot200_bl. + endif # BACKLIGHT_CLASS_DEVICE endif # BACKLIGHT_LCD_SUPPORT diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 0ee06e0..c71dd79 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -39,4 +39,4 @@ obj-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o obj-$(CONFIG_BACKLIGHT_AAT2870) += aat2870_bl.o - +obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o diff --git a/drivers/video/backlight/ot200_bl.c b/drivers/video/backlight/ot200_bl.c new file mode 100644 index 0000000..f519d55 --- /dev/null +++ b/drivers/video/backlight/ot200_bl.c @@ -0,0 +1,175 @@ +/* + * Copyright (C) 2012 Bachmann electronic GmbH + * Christian Gmeiner + * + * Backlight driver for ot200 visualisation device from + * Bachmann electronic GmbH. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include +#include +#include +#include +#include + +static struct cs5535_mfgpt_timer *pwm_timer; + +/* this array defines the mapping of brightness in % to pwm frequency */ +static const u8 dim_table[101] = {0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, + 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, + 10, 10, 11, 11, 12, 12, 13, 14, 15, 15, 16, + 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, + 30, 31, 33, 35, 37, 39, 41, 43, 45, 47, 50, + 53, 55, 58, 61, 65, 68, 72, 75, 79, 84, 88, + 93, 97, 103, 108, 114, 120, 126, 133, 140, + 147, 155, 163}; + +struct ot200_backlight_data { + int current_brightness; +}; + +#define GPIO_DIMM 27 +#define SCALE 1 +#define CMP1MODE 0x2 /* compare on GE; output high on compare + * greater than or equal */ +#define PWM_SETUP (SCALE | CMP1MODE << 6 | MFGPT_SETUP_CNTEN) +#define MAX_COMP2 163 + +static int ot200_backlight_update_status(struct backlight_device *bl) +{ + struct ot200_backlight_data *data = bl_get_data(bl); + int brightness = bl->props.brightness; + + if (bl->props.state & BL_CORE_FBBLANK) + brightness = 0; + + /* enable or disable PWM timer */ + if (brightness == 0) + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, 0); + else if (data->current_brightness == 0) { + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, + MFGPT_SETUP_CNTEN); + } + + /* apply new brightness value */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, + MAX_COMP2 - dim_table[brightness]); + data->current_brightness = brightness; + + return 0; +} + +static int ot200_backlight_get_brightness(struct backlight_device *bl) +{ + struct ot200_backlight_data *data = bl_get_data(bl); + return data->current_brightness; +} + +static const struct backlight_ops ot200_backlight_ops = { + .update_status = ot200_backlight_update_status, + .get_brightness = ot200_backlight_get_brightness, +}; + +static int ot200_backlight_probe(struct platform_device *pdev) +{ + struct backlight_device *bl; + struct ot200_backlight_data *data; + struct backlight_properties props; + int retval = 0; + + /* request gpio */ + if (gpio_request(GPIO_DIMM, "ot200 backlight dimmer") < 0) { + dev_err(&pdev->dev, "failed to request GPIO %d\n", GPIO_DIMM); + return -ENODEV; + } + + /* request timer */ + pwm_timer = cs5535_mfgpt_alloc_timer(7, MFGPT_DOMAIN_ANY); + if (!pwm_timer) { + dev_err(&pdev->dev, "MFGPT 7 not available\n"); + retval = -ENODEV; + goto error_mfgpt_alloc; + } + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + retval = -ENOMEM; + goto error_kzalloc; + } + + /* setup gpio */ + cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_ENABLE); + cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_AUX1); + + /* setup timer */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP2, MAX_COMP2); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, PWM_SETUP); + + data->current_brightness = 100; + props.max_brightness = 100; + props.brightness = 100; + props.type = BACKLIGHT_RAW; + + bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, data, + &ot200_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + retval = PTR_ERR(bl); + goto error_backlight_device_register; + } + + platform_set_drvdata(pdev, bl); + + return 0; + +error_backlight_device_register: + kfree(data); +error_kzalloc: + cs5535_mfgpt_free_timer(pwm_timer); +error_mfgpt_alloc: + gpio_free(GPIO_DIMM); + return retval; +} + +static int ot200_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct ot200_backlight_data *data = bl_get_data(bl); + + backlight_device_unregister(bl); + + /* on module unload set brightness to 100% */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, + MAX_COMP2 - dim_table[100]); + + cs5535_mfgpt_free_timer(pwm_timer); + gpio_free(GPIO_DIMM); + + kfree(data); + return 0; +} + +static struct platform_driver ot200_backlight_driver = { + .driver = { + .name = "ot200-backlight", + .owner = THIS_MODULE, + }, + .probe = ot200_backlight_probe, + .remove = ot200_backlight_remove, +}; + +module_platform_driver(ot200_backlight_driver); + +MODULE_DESCRIPTION("backlight driver for ot200 visualisation device"); +MODULE_AUTHOR("Christian Gmeiner "); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ot200-backlight"); -- cgit v0.10.2 From 35c1682cc069fc1f677012d3170757135e246b39 Mon Sep 17 00:00:00 2001 From: Grazvydas Ignotas Date: Fri, 23 Mar 2012 15:02:02 -0700 Subject: backlight: add support for Pandora backlight Add support for pandora (openpandora.org) backlight. It might look like all this could be done using pwm_bl.c instead, but there is a need of special programming sequence when turning on the LED driver chip or else it will misbehave. Doing this using pwm_bl.c would require to use some register programming and pwm functions from platform code, and ARM maintainers are allergic to driver-like code in /arch/arm nowadays. The PMIC PWM driver is currently missing too, so pwm_bl.c can't be used anyway. Signed-off-by: Grazvydas Ignotas Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 248d6c0..ed68fde5 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -348,6 +348,13 @@ config BACKLIGHT_OT200 To compile this driver as a module, choose M here: the module will be called ot200_bl. +config BACKLIGHT_PANDORA + tristate "Backlight driver for Pandora console" + depends on TWL4030_CORE + help + If you have a Pandora console, say Y to enable the + backlight driver. + endif # BACKLIGHT_CLASS_DEVICE endif # BACKLIGHT_LCD_SUPPORT diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index c71dd79..8071eb6 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o +obj-$(CONFIG_BACKLIGHT_PANDORA) += pandora_bl.o obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o diff --git a/drivers/video/backlight/pandora_bl.c b/drivers/video/backlight/pandora_bl.c new file mode 100644 index 0000000..4ec3074 --- /dev/null +++ b/drivers/video/backlight/pandora_bl.c @@ -0,0 +1,171 @@ +/* + * Backlight driver for Pandora handheld. + * Pandora uses TWL4030 PWM0 -> TPS61161 combo for control backlight. + * Based on pwm_bl.c + * + * Copyright 2009,2012 Gražvydas Ignotas + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define TWL_PWM0_ON 0x00 +#define TWL_PWM0_OFF 0x01 + +#define TWL_INTBR_GPBR1 0x0c +#define TWL_INTBR_PMBR1 0x0d + +#define TWL_PMBR1_PWM0_MUXMASK 0x0c +#define TWL_PMBR1_PWM0 0x04 +#define PWM0_CLK_ENABLE BIT(0) +#define PWM0_ENABLE BIT(2) + +/* range accepted by hardware */ +#define MIN_VALUE 9 +#define MAX_VALUE 63 +#define MAX_USER_VALUE (MAX_VALUE - MIN_VALUE) + +#define PANDORABL_WAS_OFF BL_CORE_DRIVER1 + +static int pandora_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + u8 r; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + if (bl->props.state & BL_CORE_FBBLANK) + brightness = 0; + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + if ((unsigned int)brightness > MAX_USER_VALUE) + brightness = MAX_USER_VALUE; + + if (brightness == 0) { + if (bl->props.state & PANDORABL_WAS_OFF) + goto done; + + /* first disable PWM0 output, then clock */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_GPBR1); + r &= ~PWM0_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + r &= ~PWM0_CLK_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + + goto done; + } + + if (bl->props.state & PANDORABL_WAS_OFF) { + /* + * set PWM duty cycle to max. TPS61161 seems to use this + * to calibrate it's PWM sensitivity when it starts. + */ + twl_i2c_write_u8(TWL4030_MODULE_PWM0, MAX_VALUE, + TWL_PWM0_OFF); + + /* first enable clock, then PWM0 out */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_GPBR1); + r &= ~PWM0_ENABLE; + r |= PWM0_CLK_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + r |= PWM0_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + + /* + * TI made it very easy to enable digital control, so easy that + * it often triggers unintentionally and disabes PWM control, + * so wait until 1 wire mode detection window ends. + */ + usleep_range(2000, 10000); + } + + twl_i2c_write_u8(TWL4030_MODULE_PWM0, MIN_VALUE + brightness, + TWL_PWM0_OFF); + +done: + if (brightness != 0) + bl->props.state &= ~PANDORABL_WAS_OFF; + else + bl->props.state |= PANDORABL_WAS_OFF; + + return 0; +} + +static int pandora_backlight_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static const struct backlight_ops pandora_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = pandora_backlight_update_status, + .get_brightness = pandora_backlight_get_brightness, +}; + +static int pandora_backlight_probe(struct platform_device *pdev) +{ + struct backlight_properties props; + struct backlight_device *bl; + u8 r; + + memset(&props, 0, sizeof(props)); + props.max_brightness = MAX_USER_VALUE; + props.type = BACKLIGHT_RAW; + bl = backlight_device_register(pdev->name, &pdev->dev, + NULL, &pandora_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + platform_set_drvdata(pdev, bl); + + /* 64 cycle period, ON position 0 */ + twl_i2c_write_u8(TWL4030_MODULE_PWM0, 0x80, TWL_PWM0_ON); + + bl->props.state |= PANDORABL_WAS_OFF; + bl->props.brightness = MAX_USER_VALUE; + backlight_update_status(bl); + + /* enable PWM function in pin mux */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_PMBR1); + r &= ~TWL_PMBR1_PWM0_MUXMASK; + r |= TWL_PMBR1_PWM0; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_PMBR1); + + return 0; +} + +static int pandora_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + backlight_device_unregister(bl); + return 0; +} + +static struct platform_driver pandora_backlight_driver = { + .driver = { + .name = "pandora-backlight", + .owner = THIS_MODULE, + }, + .probe = pandora_backlight_probe, + .remove = pandora_backlight_remove, +}; + +module_platform_driver(pandora_backlight_driver); + +MODULE_AUTHOR("Gražvydas Ignotas "); +MODULE_DESCRIPTION("Pandora Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pandora-backlight"); -- cgit v0.10.2 From 67a67272e890c79372bc0e2e555071f903d864a7 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Fri, 23 Mar 2012 15:02:02 -0700 Subject: backlight: convert platform_lcd to dev_pm_ops Instead of using legacy suspend/resume methods, using newer dev_pm_ops structure allows better control over power management. Signed-off-by: Jingoo Han Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/platform_lcd.c b/drivers/video/backlight/platform_lcd.c index f0bf491..b667234 100644 --- a/drivers/video/backlight/platform_lcd.c +++ b/drivers/video/backlight/platform_lcd.c @@ -121,9 +121,9 @@ static int __devexit platform_lcd_remove(struct platform_device *pdev) } #ifdef CONFIG_PM -static int platform_lcd_suspend(struct platform_device *pdev, pm_message_t st) +static int platform_lcd_suspend(struct device *dev) { - struct platform_lcd *plcd = platform_get_drvdata(pdev); + struct platform_lcd *plcd = dev_get_drvdata(dev); plcd->suspended = 1; platform_lcd_set_power(plcd->lcd, plcd->power); @@ -131,29 +131,30 @@ static int platform_lcd_suspend(struct platform_device *pdev, pm_message_t st) return 0; } -static int platform_lcd_resume(struct platform_device *pdev) +static int platform_lcd_resume(struct device *dev) { - struct platform_lcd *plcd = platform_get_drvdata(pdev); + struct platform_lcd *plcd = dev_get_drvdata(dev); plcd->suspended = 0; platform_lcd_set_power(plcd->lcd, plcd->power); return 0; } -#else -#define platform_lcd_suspend NULL -#define platform_lcd_resume NULL + +static SIMPLE_DEV_PM_OPS(platform_lcd_pm_ops, platform_lcd_suspend, + platform_lcd_resume); #endif static struct platform_driver platform_lcd_driver = { .driver = { .name = "platform-lcd", .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &platform_lcd_pm_ops, +#endif }, .probe = platform_lcd_probe, .remove = __devexit_p(platform_lcd_remove), - .suspend = platform_lcd_suspend, - .resume = platform_lcd_resume, }; module_platform_driver(platform_lcd_driver); -- cgit v0.10.2 From 2df5e12900d847af9113980d015939dde0d1b1d4 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Fri, 23 Mar 2012 15:02:03 -0700 Subject: backlight: fix ot200_bl build Fix build error when GPIO_CS5535 is not enabled: drivers/built-in.o: In function `ot200_backlight_probe': ot200_bl.c:(.text+0x205bf): undefined reference to `cs5535_gpio_set' ot200_bl.c:(.text+0x205d1): undefined reference to `cs5535_gpio_set' Signed-off-by: Randy Dunlap Cc: Christian Gmeiner Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index ed68fde5..7ed9991 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -343,7 +343,7 @@ config BACKLIGHT_LP855X config BACKLIGHT_OT200 tristate "Backlight driver for ot200 visualisation device" - depends on BACKLIGHT_CLASS_DEVICE && CS5535_MFGPT + depends on BACKLIGHT_CLASS_DEVICE && CS5535_MFGPT && GPIO_CS5535 help To compile this driver as a module, choose M here: the module will be called ot200_bl. -- cgit v0.10.2 From 307b1cd7ecd7f3dc5ce3d3860957f034f0abe4df Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:03 -0700 Subject: bitops: rename for_each_set_bit_cont() in favor of analogous list.h function This renames for_each_set_bit_cont() to for_each_set_bit_from() because it is analogous to list_for_each_entry_from() in list.h rather than list_for_each_entry_continue(). This doesn't remove for_each_set_bit_cont() for now. Signed-off-by: Akinobu Mita Cc: Robert Richter Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 0a18d16..fa2900c 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -643,14 +643,14 @@ static bool __perf_sched_find_counter(struct perf_sched *sched) /* Prefer fixed purpose counters */ if (x86_pmu.num_counters_fixed) { idx = X86_PMC_IDX_FIXED; - for_each_set_bit_cont(idx, c->idxmsk, X86_PMC_IDX_MAX) { + for_each_set_bit_from(idx, c->idxmsk, X86_PMC_IDX_MAX) { if (!__test_and_set_bit(idx, sched->state.used)) goto done; } } /* Grab the first unused counter starting with idx */ idx = sched->state.counter; - for_each_set_bit_cont(idx, c->idxmsk, X86_PMC_IDX_FIXED) { + for_each_set_bit_from(idx, c->idxmsk, X86_PMC_IDX_FIXED) { if (!__test_and_set_bit(idx, sched->state.used)) goto done; } diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 94300fe..a78e358 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -27,11 +27,14 @@ extern unsigned long __sw_hweight64(__u64 w); (bit) = find_next_bit((addr), (size), (bit) + 1)) /* same as for_each_set_bit() but use bit as value to start with */ -#define for_each_set_bit_cont(bit, addr, size) \ +#define for_each_set_bit_from(bit, addr, size) \ for ((bit) = find_next_bit((addr), (size), (bit)); \ (bit) < (size); \ (bit) = find_next_bit((addr), (size), (bit) + 1)) +#define for_each_set_bit_cont(bit, addr, size) \ + for_each_set_bit_from(bit, addr, size) + static __inline__ int get_bitmask_order(unsigned int count) { int order; diff --git a/tools/perf/util/include/linux/bitops.h b/tools/perf/util/include/linux/bitops.h index 62cdee7..f1584833 100644 --- a/tools/perf/util/include/linux/bitops.h +++ b/tools/perf/util/include/linux/bitops.h @@ -15,7 +15,7 @@ (bit) = find_next_bit((addr), (size), (bit) + 1)) /* same as for_each_set_bit() but use bit as value to start with */ -#define for_each_set_bit_cont(bit, addr, size) \ +#define for_each_set_bit_from(bit, addr, size) \ for ((bit) = find_next_bit((addr), (size), (bit)); \ (bit) < (size); \ (bit) = find_next_bit((addr), (size), (bit) + 1)) -- cgit v0.10.2 From 0a329d2d5a1dd75273597538cdc33512ee38855e Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:04 -0700 Subject: bitops: remove for_each_set_bit_cont() Remove for_each_set_bit_cont() after confirming that no one uses for_each_set_bit_cont() anymore. [sfr@canb.auug.org.au: regmap: cope with bitops API change] Signed-off-by: Akinobu Mita Signed-off-by: Stephen Rothwell Cc: Robert Richter Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Mark Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c index 8d00615..77dc532 100644 --- a/drivers/base/regmap/regcache-lzo.c +++ b/drivers/base/regmap/regcache-lzo.c @@ -341,7 +341,7 @@ static int regcache_lzo_sync(struct regmap *map, unsigned int min, lzo_blocks = map->cache; i = min; - for_each_set_bit_cont(i, lzo_blocks[0]->sync_bmp, + for_each_set_bit_from(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) { if (i > max) continue; diff --git a/include/linux/bitops.h b/include/linux/bitops.h index a78e358..348b1dc 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -32,9 +32,6 @@ extern unsigned long __sw_hweight64(__u64 w); (bit) < (size); \ (bit) = find_next_bit((addr), (size), (bit) + 1)) -#define for_each_set_bit_cont(bit, addr, size) \ - for_each_set_bit_from(bit, addr, size) - static __inline__ int get_bitmask_order(unsigned int count) { int order; -- cgit v0.10.2 From 03f4a8226c2f9c14361f75848d1e93139bab90c4 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:04 -0700 Subject: bitops: introduce for_each_clear_bit() Introduce for_each_clear_bit() and for_each_clear_bit_from(). They are similar to for_each_set_bit() and list_for_each_set_bit_from(), but they iterate over all the cleared bits in a memory region. Signed-off-by: Akinobu Mita Cc: Robert Richter Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: David Woodhouse Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Stefano Panella Cc: David Vrabel Cc: Sergei Shtylyov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 348b1dc..a3b6b82 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -32,6 +32,17 @@ extern unsigned long __sw_hweight64(__u64 w); (bit) < (size); \ (bit) = find_next_bit((addr), (size), (bit) + 1)) +#define for_each_clear_bit(bit, addr, size) \ + for ((bit) = find_first_zero_bit((addr), (size)); \ + (bit) < (size); \ + (bit) = find_next_zero_bit((addr), (size), (bit) + 1)) + +/* same as for_each_clear_bit() but use bit as value to start with */ +#define for_each_clear_bit_from(bit, addr, size) \ + for ((bit) = find_next_zero_bit((addr), (size), (bit)); \ + (bit) < (size); \ + (bit) = find_next_zero_bit((addr), (size), (bit) + 1)) + static __inline__ int get_bitmask_order(unsigned int count) { int order; -- cgit v0.10.2 From c527b414ca3daf0b0c616992d3b580486926a8e9 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:05 -0700 Subject: mtd: use for_each_clear_bit() Use for_each_clear_bit() to iterate over all the cleared bit in a memory region. Signed-off-by: Akinobu Mita Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index e1e122f..9bcd1f4 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -2526,12 +2526,10 @@ static void cfi_intelext_restore_locks(struct mtd_info *mtd) if (!region->lockmap) continue; - for (block = 0; block < region->numblocks; block++) { + for_each_clear_bit(block, region->lockmap, region->numblocks) { len = region->erasesize; adr = region->offset + block * len; - - if (!test_bit(block, region->lockmap)) - cfi_intelext_unlock(mtd, adr, len); + cfi_intelext_unlock(mtd, adr, len); } } } -- cgit v0.10.2 From fc89db4b789fc9edf88440f6896f04a879ed3b46 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:05 -0700 Subject: s390/char: use for_each_clear_bit() Use for_each_clear_bit() to iterate over all the cleared bit in a memory region. Signed-off-by: Akinobu Mita Cc: Martin Schwidefsky Cc: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c index 0b54a91..168525a 100644 --- a/drivers/s390/char/sclp_cmd.c +++ b/drivers/s390/char/sclp_cmd.c @@ -441,9 +441,8 @@ static int sclp_mem_notifier(struct notifier_block *nb, start = arg->start_pfn << PAGE_SHIFT; size = arg->nr_pages << PAGE_SHIFT; mutex_lock(&sclp_mem_mutex); - for (id = 0; id <= sclp_max_storage_id; id++) - if (!test_bit(id, sclp_storage_ids)) - sclp_attach_storage(id); + for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1) + sclp_attach_storage(id); switch (action) { case MEM_ONLINE: case MEM_GOING_OFFLINE: -- cgit v0.10.2 From 1a07cbba1425ec7215854cfaa9a8df66047cfb57 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:05 -0700 Subject: uwb: use for_each_clear_bit() Use for_each_clear_bit() to iterate over all the cleared bit in a memory region. Signed-off-by: Akinobu Mita Cc: Stefano Panella Cc: David Vrabel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/uwb/allocator.c b/drivers/uwb/allocator.c index e45e673..6e3e713 100644 --- a/drivers/uwb/allocator.c +++ b/drivers/uwb/allocator.c @@ -334,10 +334,8 @@ int uwb_rsv_find_best_allocation(struct uwb_rsv *rsv, struct uwb_mas_bm *availab /* fill the not available vector from the available bm */ - for (bit_index = 0; bit_index < UWB_NUM_MAS; bit_index++) { - if (!test_bit(bit_index, available->bm)) - ai->bm[bit_index] = UWB_RSV_MAS_NOT_AVAIL; - } + for_each_clear_bit(bit_index, available->bm, UWB_NUM_MAS) + ai->bm[bit_index] = UWB_RSV_MAS_NOT_AVAIL; if (ai->max_interval == 1) { get_row_descriptors(ai); -- cgit v0.10.2 From 0b2f4d4d76a09f02fa37bfa57909483448fac771 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:06 -0700 Subject: x86: use for_each_clear_bit_from() Use for_each_clear_bit() to iterate over all the cleared bit in a memory region. Signed-off-by: Akinobu Mita Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c index 313fb5c..43e2b1c 100644 --- a/arch/x86/kernel/irqinit.c +++ b/arch/x86/kernel/irqinit.c @@ -306,10 +306,10 @@ void __init native_init_IRQ(void) * us. (some of these will be overridden and become * 'special' SMP interrupts) */ - for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) { + i = FIRST_EXTERNAL_VECTOR; + for_each_clear_bit_from(i, used_vectors, NR_VECTORS) { /* IA32_SYSCALL_VECTOR could be used in trap_init already. */ - if (!test_bit(i, used_vectors)) - set_intr_gate(i, interrupt[i-FIRST_EXTERNAL_VECTOR]); + set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]); } if (!acpi_ioapic && !of_ioapic) -- cgit v0.10.2 From 3a2fd4a14112452eb5c1a079ac8b3f4842762afe Mon Sep 17 00:00:00 2001 From: Masanari Iida Date: Fri, 23 Mar 2012 15:02:06 -0700 Subject: drivers/leds/leds-lp5521.c: fix typo "reseting" -> "resetting" Signed-off-by: Masanari Iida Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index d62a798..c42c8f0 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -694,7 +694,7 @@ static int __devinit lp5521_probe(struct i2c_client *client, */ lp5521_read(client, LP5521_REG_R_CURRENT, &buf); if (buf != LP5521_REG_R_CURR_DEFAULT) { - dev_err(&client->dev, "error in reseting chip\n"); + dev_err(&client->dev, "error in resetting chip\n"); goto fail2; } usleep_range(10000, 20000); -- cgit v0.10.2 From 920c4f4c3651855f888ec708ecc656ba10dd8f1d Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 23 Mar 2012 15:02:07 -0700 Subject: drivers/leds/leds-tca6507.c: cleanup error handling in tca6507_probe() Just a small tidy-up. 1) There is a NULL dereference if the tca allocation fails. 2) The call to cancel_work_sync() isn't needed because we haven't scheduled any work. 3) The call to i2c_set_clientdata() isn't needed because the core handles that automatically if probe() fails. 4) I added some curly braces for style reasons. Signed-off-by: Dan Carpenter Cc: Richard Purdie Acked-by: NeilBrown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c index 133f89f..ec06a81 100644 --- a/drivers/leds/leds-tca6507.c +++ b/drivers/leds/leds-tca6507.c @@ -687,10 +687,9 @@ static int __devinit tca6507_probe(struct i2c_client *client, NUM_LEDS); return -ENODEV; } - err = -ENOMEM; tca = kzalloc(sizeof(*tca), GFP_KERNEL); if (!tca) - goto exit; + return -ENOMEM; tca->client = client; INIT_WORK(&tca->work, tca6507_work); @@ -724,11 +723,10 @@ static int __devinit tca6507_probe(struct i2c_client *client, return 0; exit: - while (i--) + while (i--) { if (tca->leds[i].led_cdev.name) led_classdev_unregister(&tca->leds[i].led_cdev); - cancel_work_sync(&tca->work); - i2c_set_clientdata(client, NULL); + } kfree(tca); return err; } -- cgit v0.10.2 From c5bd2a712a0c7299b61b0e02404b1376f794d251 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Fri, 23 Mar 2012 15:02:07 -0700 Subject: drivers/leds/leds-tca6507.c: remove obsolete cleanup for clientdata A few new i2c-drivers came into the kernel which clear the clientdata-pointer on exit or error. This is obsolete meanwhile, the core will do it. Signed-off-by: Wolfram Sang Cc: NeilBrown Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c index ec06a81..6c1c14f 100644 --- a/drivers/leds/leds-tca6507.c +++ b/drivers/leds/leds-tca6507.c @@ -743,7 +743,6 @@ static int __devexit tca6507_remove(struct i2c_client *client) } tca6507_remove_gpio(tca); cancel_work_sync(&tca->work); - i2c_set_clientdata(client, NULL); kfree(tca); return 0; -- cgit v0.10.2 From 5ae4e8a77dc82afcfe8460168ec0b94f4b79a54a Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:08 -0700 Subject: drivers/leds/leds-lp5521.c: add 'name' in the lp5521_led_config The name of each led channel can be configurable. For the compatibility, the name is set to default value(xx:channelN) when 'name' is not defined. Signed-off-by: Milo(Woogyom) Kim Acked-by: Linus Walleij Cc: Arun MURTHY Cc: Srinidhi Kasagar Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt index c4d8d15..f48ab75 100644 --- a/Documentation/leds/leds-lp5521.txt +++ b/Documentation/leds/leds-lp5521.txt @@ -43,17 +43,23 @@ Format: 10x mA i.e 10 means 1.0 mA example platform data: Note: chan_nr can have values between 0 and 2. +The name of each channel can be configurable. +If the name field is not defined, the default name will be set to 'xxxx:channelN' +(XXXX : pdata->label or i2c client name, N : channel number) static struct lp5521_led_config lp5521_led_config[] = { { + .name = "red", .chan_nr = 0, .led_current = 50, .max_current = 130, }, { + .name = "green", .chan_nr = 1, .led_current = 0, .max_current = 130, }, { + .name = "blue", .chan_nr = 2, .led_current = 0, .max_current = 130, diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index c42c8f0..59feecd 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -620,10 +620,15 @@ static int __devinit lp5521_init_led(struct lp5521_led *led, return -EINVAL; } - snprintf(name, sizeof(name), "%s:channel%d", - pdata->label ?: client->name, chan); led->cdev.brightness_set = lp5521_set_brightness; - led->cdev.name = name; + if (pdata->led_config[chan].name) { + led->cdev.name = pdata->led_config[chan].name; + } else { + snprintf(name, sizeof(name), "%s:channel%d", + pdata->label ?: client->name, chan); + led->cdev.name = name; + } + res = led_classdev_register(dev, &led->cdev); if (res < 0) { dev_err(dev, "couldn't register led on channel %d\n", chan); diff --git a/include/linux/leds-lp5521.h b/include/linux/leds-lp5521.h index fd548d2..e675b8d 100644 --- a/include/linux/leds-lp5521.h +++ b/include/linux/leds-lp5521.h @@ -26,6 +26,7 @@ /* See Documentation/leds/leds-lp5521.txt */ struct lp5521_led_config { + char *name; u8 chan_nr; u8 led_current; /* mA x10, 0 if led is not connected */ u8 max_current; -- cgit v0.10.2 From 3b49aacd0e56d5bf1b511f6554f17cd65eb8da64 Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:08 -0700 Subject: drivers/leds/leds-lp5521.c: add 'update_config' in the lp5521_platform_data The value of CONFIG register(Addr 08h) is configurable. For supporting this feature, update_config is added in the platform data. If 'update_config' is not defined, the default value is 'LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT'. To define CONFIG register in the platform data, the bit definitions were mo= ved to the header file. Documentation updated : description about 'update_config' and example. Signed-off-by: Milo(Woogyom) Kim Acked-by: Linus Walleij Cc: Arun MURTHY Cc: Srinidhi Kasagar Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt index f48ab75..e3c66c6 100644 --- a/Documentation/leds/leds-lp5521.txt +++ b/Documentation/leds/leds-lp5521.txt @@ -92,3 +92,22 @@ static struct lp5521_platform_data lp5521_platform_data = { If the current is set to 0 in the platform data, that channel is disabled and it is not visible in the sysfs. + +The 'update_config' : CONFIG register (ADDR 08h) +This value is platform-specific data. +If update_config is not defined, the CONFIG register is set with +'LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT'. +(Enable auto-powersave, set charge pump to auto, red to battery) + +example of update_config : + +#define LP5521_CONFIGS (LP5521_PWM_HF | LP5521_PWRSAVE_EN | \ + LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT | \ + LP5521_CLK_INT) + +static struct lp5521_platform_data lp5521_pdata = { + .led_config = lp5521_led_config, + .num_channels = ARRAY_SIZE(lp5521_led_config), + .clock_mode = LP5521_CLOCK_INT, + .update_config = LP5521_CONFIGS, +}; diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 59feecd..9682ece 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -82,18 +82,6 @@ #define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ #define LP5521_EXEC_RUN 0x2A -/* Bits in CONFIG register */ -#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */ -#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */ -#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */ -#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */ -#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */ -#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */ -#define LP5521_R_TO_BATT 4 /* R out: 0 = CP, 1 = Vbat */ -#define LP5521_CLK_SRC_EXT 0 /* Ext-clk source (CLK_32K) */ -#define LP5521_CLK_INT 1 /* Internal clock */ -#define LP5521_CLK_AUTO 2 /* Automatic clock selection */ - /* Status */ #define LP5521_EXT_CLK_USED 0x08 @@ -241,15 +229,16 @@ static int lp5521_configure(struct i2c_client *client) { struct lp5521_chip *chip = i2c_get_clientdata(client); int ret; + u8 cfg; lp5521_init_engine(chip); /* Set all PWMs to direct control mode */ ret = lp5521_write(client, LP5521_REG_OP_MODE, 0x3F); - /* Enable auto-powersave, set charge pump to auto, red to battery */ - ret |= lp5521_write(client, LP5521_REG_CONFIG, - LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT); + cfg = chip->pdata->update_config ? + : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT); + ret |= lp5521_write(client, LP5521_REG_CONFIG, cfg); /* Initialize all channels PWM to zero -> leds off */ ret |= lp5521_write(client, LP5521_REG_R_PWM, 0); diff --git a/include/linux/leds-lp5521.h b/include/linux/leds-lp5521.h index e675b8d..e9ab583 100644 --- a/include/linux/leds-lp5521.h +++ b/include/linux/leds-lp5521.h @@ -36,6 +36,18 @@ struct lp5521_led_config { #define LP5521_CLOCK_INT 1 #define LP5521_CLOCK_EXT 2 +/* Bits in CONFIG register */ +#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */ +#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */ +#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */ +#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */ +#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */ +#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */ +#define LP5521_R_TO_BATT 4 /* R out: 0 = CP, 1 = Vbat */ +#define LP5521_CLK_SRC_EXT 0 /* Ext-clk source (CLK_32K) */ +#define LP5521_CLK_INT 1 /* Internal clock */ +#define LP5521_CLK_AUTO 2 /* Automatic clock selection */ + struct lp5521_platform_data { struct lp5521_led_config *led_config; u8 num_channels; @@ -44,6 +56,7 @@ struct lp5521_platform_data { void (*release_resources)(void); void (*enable)(bool state); const char *label; + u8 update_config; }; #endif /* __LINUX_LP5521_H */ -- cgit v0.10.2 From 011af7bc7cd188a0310e2d26cdc2cc5d90148b0c Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:09 -0700 Subject: drivers/leds/leds-lp5521.c: support led pattern data The lp5521 has autonomous operation mode without external control. Using lp5521_platform_data, various led patterns can be configurable. For supporting this feature, new functions and device attribute are added. Structure of lp5521_led_pattern: 3 channels are supported - red, green and blue. Pattern(s) of each channel and numbers of pattern(s) are defined in the pla= tform data. Pattern data are hexa codes which include pattern commands such like set pwm, wait, ramp up/down, branch and so on. Pattern mode functions: * lp5521_clear_program_memory Before running new led pattern, program memory should be cleared. * lp5521_write_program_memory Pattern data updated in the program memory via the i2c. * lp5521_get_pattern Get pattern from predefined in the platform data. * lp5521_run_led_pattern Stop current pattern or run new pattern. Transition time is required between different operation mode. Device attribute - 'led_pattern': To load specific led pattern, new device attribute is added. When the lp5521 driver is unloaded, stop current led pattern mode. Documentation updated : description about how to define the led patterns and example. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Milo(Woogyom) Kim Acked-by: Linus Walleij Cc: Arun MURTHY Cc: Srinidhi Kasagar Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt index e3c66c6..0e542ab 100644 --- a/Documentation/leds/leds-lp5521.txt +++ b/Documentation/leds/leds-lp5521.txt @@ -111,3 +111,41 @@ static struct lp5521_platform_data lp5521_pdata = { .clock_mode = LP5521_CLOCK_INT, .update_config = LP5521_CONFIGS, }; + +LED patterns : LP5521 has autonomous operation without external control. +Pattern data can be defined in the platform data. + +example of led pattern data : + +/* RGB(50,5,0) 500ms on, 500ms off, infinite loop */ +static u8 pattern_red[] = { + 0x40, 0x32, 0x60, 0x00, 0x40, 0x00, 0x60, 0x00, + }; + +static u8 pattern_green[] = { + 0x40, 0x05, 0x60, 0x00, 0x40, 0x00, 0x60, 0x00, + }; + +static struct lp5521_led_pattern board_led_patterns[] = { + { + .r = pattern_red, + .g = pattern_green, + .size_r = ARRAY_SIZE(pattern_red), + .size_g = ARRAY_SIZE(pattern_green), + }, +}; + +static struct lp5521_platform_data lp5521_platform_data = { + .led_config = lp5521_led_config, + .num_channels = ARRAY_SIZE(lp5521_led_config), + .clock_mode = LP5521_CLOCK_EXT, + .patterns = board_led_patterns, + .num_patterns = ARRAY_SIZE(board_led_patterns), +}; + +Then predefined led pattern(s) can be executed via the sysfs. +To start the pattern #1, +# echo 1 > /sys/bus/i2c/devices/xxxx/led_pattern +(xxxx : i2c bus & slave address) +To end the pattern, +# echo 0 > /sys/bus/i2c/devices/xxxx/led_pattern diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 9682ece..007c7c9 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -88,6 +88,9 @@ /* default R channel current register value */ #define LP5521_REG_R_CURR_DEFAULT 0xAF +/* Pattern Mode */ +#define PATTERN_OFF 0 + struct lp5521_engine { int id; u8 mode; @@ -493,7 +496,7 @@ static ssize_t store_current(struct device *dev, ssize_t ret; unsigned long curr; - if (strict_strtoul(buf, 0, &curr)) + if (kstrtoul(buf, 0, &curr)) return -EINVAL; if (curr > led->max_current) @@ -525,6 +528,100 @@ static ssize_t lp5521_selftest(struct device *dev, return sprintf(buf, "%s\n", ret ? "FAIL" : "OK"); } +static void lp5521_clear_program_memory(struct i2c_client *cl) +{ + int i; + u8 rgb_mem[] = { + LP5521_REG_R_PROG_MEM, + LP5521_REG_G_PROG_MEM, + LP5521_REG_B_PROG_MEM, + }; + + for (i = 0; i < ARRAY_SIZE(rgb_mem); i++) { + lp5521_write(cl, rgb_mem[i], 0); + lp5521_write(cl, rgb_mem[i] + 1, 0); + } +} + +static void lp5521_write_program_memory(struct i2c_client *cl, + u8 base, u8 *rgb, int size) +{ + int i; + + if (!rgb || size <= 0) + return; + + for (i = 0; i < size; i++) + lp5521_write(cl, base + i, *(rgb + i)); + + lp5521_write(cl, base + i, 0); + lp5521_write(cl, base + i + 1, 0); +} + +static inline struct lp5521_led_pattern *lp5521_get_pattern + (struct lp5521_chip *chip, u8 offset) +{ + struct lp5521_led_pattern *ptn; + ptn = chip->pdata->patterns + (offset - 1); + return ptn; +} + +static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip) +{ + struct lp5521_led_pattern *ptn; + struct i2c_client *cl = chip->client; + int num_patterns = chip->pdata->num_patterns; + + if (mode > num_patterns || !(chip->pdata->patterns)) + return; + + if (mode == PATTERN_OFF) { + lp5521_write(cl, LP5521_REG_ENABLE, + LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM); + usleep_range(1000, 2000); + lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); + } else { + ptn = lp5521_get_pattern(chip, mode); + if (!ptn) + return; + + lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_LOAD); + usleep_range(1000, 2000); + + lp5521_clear_program_memory(cl); + + lp5521_write_program_memory(cl, LP5521_REG_R_PROG_MEM, + ptn->r, ptn->size_r); + lp5521_write_program_memory(cl, LP5521_REG_G_PROG_MEM, + ptn->g, ptn->size_g); + lp5521_write_program_memory(cl, LP5521_REG_B_PROG_MEM, + ptn->b, ptn->size_b); + + lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_RUN); + usleep_range(1000, 2000); + lp5521_write(cl, LP5521_REG_ENABLE, + LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM | + LP5521_EXEC_RUN); + } +} + +static ssize_t store_led_pattern(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lp5521_chip *chip = i2c_get_clientdata(to_i2c_client(dev)); + unsigned long val; + int ret; + + ret = strict_strtoul(buf, 16, &val); + if (ret) + return ret; + + lp5521_run_led_pattern(val, chip); + + return len; +} + /* led class device attributes */ static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, show_current, store_current); static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL); @@ -550,6 +647,7 @@ static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load); static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load); static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load); static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL); +static DEVICE_ATTR(led_pattern, S_IWUSR, NULL, store_led_pattern); static struct attribute *lp5521_attributes[] = { &dev_attr_engine1_mode.attr, @@ -559,6 +657,7 @@ static struct attribute *lp5521_attributes[] = { &dev_attr_engine1_load.attr, &dev_attr_engine2_load.attr, &dev_attr_engine3_load.attr, + &dev_attr_led_pattern.attr, NULL }; @@ -761,6 +860,7 @@ static int __devexit lp5521_remove(struct i2c_client *client) struct lp5521_chip *chip = i2c_get_clientdata(client); int i; + lp5521_run_led_pattern(PATTERN_OFF, chip); lp5521_unregister_sysfs(client); for (i = 0; i < chip->num_leds; i++) { diff --git a/include/linux/leds-lp5521.h b/include/linux/leds-lp5521.h index e9ab583..3f071ec 100644 --- a/include/linux/leds-lp5521.h +++ b/include/linux/leds-lp5521.h @@ -32,6 +32,15 @@ struct lp5521_led_config { u8 max_current; }; +struct lp5521_led_pattern { + u8 *r; + u8 *g; + u8 *b; + u8 size_r; + u8 size_g; + u8 size_b; +}; + #define LP5521_CLOCK_AUTO 0 #define LP5521_CLOCK_INT 1 #define LP5521_CLOCK_EXT 2 @@ -57,6 +66,8 @@ struct lp5521_platform_data { void (*enable)(bool state); const char *label; u8 update_config; + struct lp5521_led_pattern *patterns; + int num_patterns; }; #endif /* __LINUX_LP5521_H */ -- cgit v0.10.2 From 32a2f747ddf58b0f9ad786c4f3853b1ca7750cf9 Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:09 -0700 Subject: drivers/leds/leds-lp5521.c: redefinition of register bits For better readability, values of LP5521_REG_ENABLE register were redefined= . Additional definitions: LP5521_ENABLE_DEFAULT and LP5521_ENABLE_RUN_PROGRAM= . Use definition rather than hard code value. : 0x3F -> 'LP5521_CMD_DIRECT' Signed-off-by: Milo(Woogyom) Kim Acked-by: Linus Walleij Cc: Arun MURTHY Cc: Srinidhi Kasagar Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 007c7c9..de7b8fe 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -81,6 +81,10 @@ #define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */ #define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ #define LP5521_EXEC_RUN 0x2A +#define LP5521_ENABLE_DEFAULT \ + (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM) +#define LP5521_ENABLE_RUN_PROGRAM \ + (LP5521_ENABLE_DEFAULT | LP5521_EXEC_RUN) /* Status */ #define LP5521_EXT_CLK_USED 0x08 @@ -237,7 +241,7 @@ static int lp5521_configure(struct i2c_client *client) lp5521_init_engine(chip); /* Set all PWMs to direct control mode */ - ret = lp5521_write(client, LP5521_REG_OP_MODE, 0x3F); + ret = lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); cfg = chip->pdata->update_config ? : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT); @@ -250,8 +254,7 @@ static int lp5521_configure(struct i2c_client *client) /* Set engines are set to run state when OP_MODE enables engines */ ret |= lp5521_write(client, LP5521_REG_ENABLE, - LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM | - LP5521_EXEC_RUN); + LP5521_ENABLE_RUN_PROGRAM); /* enable takes 500us. 1 - 2 ms leaves some margin */ usleep_range(1000, 2000); @@ -302,8 +305,7 @@ static int lp5521_detect(struct i2c_client *client) int ret; u8 buf; - ret = lp5521_write(client, LP5521_REG_ENABLE, - LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM); + ret = lp5521_write(client, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT); if (ret) return ret; /* enable takes 500us. 1 - 2 ms leaves some margin */ @@ -311,7 +313,7 @@ static int lp5521_detect(struct i2c_client *client) ret = lp5521_read(client, LP5521_REG_ENABLE, &buf); if (ret) return ret; - if (buf != (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM)) + if (buf != LP5521_ENABLE_DEFAULT) return -ENODEV; return 0; @@ -576,8 +578,7 @@ static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip) return; if (mode == PATTERN_OFF) { - lp5521_write(cl, LP5521_REG_ENABLE, - LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM); + lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT); usleep_range(1000, 2000); lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); } else { @@ -599,9 +600,7 @@ static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip) lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_RUN); usleep_range(1000, 2000); - lp5521_write(cl, LP5521_REG_ENABLE, - LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM | - LP5521_EXEC_RUN); + lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM); } } -- cgit v0.10.2 From 42960b76d2c6a44d7e8000f4eb9a4ca1780059ff Mon Sep 17 00:00:00 2001 From: Srinidhi KASAGAR Date: Fri, 23 Mar 2012 15:02:09 -0700 Subject: drivers/leds/leds-lp5521.c: ret may be uninitialized Fix it by assigning the lp5521_read return value. Signed-off-by: srinidhi kasagar Cc: Milo(Woogyom) Kim Cc: Linus Walleij Cc: Arun MURTHY Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index de7b8fe..410a723 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -784,7 +784,7 @@ static int __devinit lp5521_probe(struct i2c_client *client, * otherwise further access to the R G B channels in the * LP5521_REG_ENABLE register will not have any effect - strange! */ - lp5521_read(client, LP5521_REG_R_CURRENT, &buf); + ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf); if (buf != LP5521_REG_R_CURR_DEFAULT) { dev_err(&client->dev, "error in resetting chip\n"); goto fail2; -- cgit v0.10.2 From d06cb46c3e59e4f212bc7b86720a073a1aee1f63 Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 23 Mar 2012 15:02:10 -0700 Subject: drivers/leds/leds-lp5523.c: constify some data Saves ~50 bytes text and speeds things up. Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c index 73e791a..857a3e1 100644 --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -152,7 +152,7 @@ static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led) static int lp5523_set_mode(struct lp5523_engine *engine, u8 mode); static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode); -static int lp5523_load_program(struct lp5523_engine *engine, u8 *pattern); +static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern); static void lp5523_led_brightness_work(struct work_struct *work); @@ -196,7 +196,7 @@ static int lp5523_configure(struct i2c_client *client) u8 status; /* one pattern per engine setting led mux start and stop addresses */ - u8 pattern[][LP5523_PROGRAM_LENGTH] = { + static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, @@ -301,7 +301,7 @@ static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux) return ret; } -static int lp5523_load_program(struct lp5523_engine *engine, u8 *pattern) +static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern) { struct lp5523_chip *chip = engine_to_lp5523(engine); struct i2c_client *client = chip->client; -- cgit v0.10.2 From 75cb2e1d1a53e732ebc81e7c4fa781aa8d7a9619 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Fri, 23 Mar 2012 15:02:10 -0700 Subject: drivers/leds: add driver for PCA9633 I2C chip Driver for the PCA9633 I2C chip supporting four LEDs and 255 brightness levels. [akpm@linux-foundation.org: fix kcalloc() call] [axel.lin@gmail.com: fix kcalloc parameters swapped] Signed-off-by: Peter Meerwald Signed-off-by: Axel Lin Cc: Lars-Peter Clausen Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 8c7a75d..e2ac190 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -234,6 +234,14 @@ config LEDS_PCA955X LED driver chips accessed via the I2C bus. Supported devices include PCA9550, PCA9551, PCA9552, and PCA9553. +config LEDS_PCA9633 + tristate "LED support for PCA9633 I2C chip" + depends on LEDS_CLASS + depends on I2C + help + This option enables support for LEDs connected to the PCA9633 + LED driver chip accessed via the I2C bus. + config LEDS_WM831X_STATUS tristate "LED support for status LEDs on WM831x PMICs" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 6bcf4f6..fa0f428 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -30,6 +30,7 @@ obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o obj-$(CONFIG_LEDS_OT200) += leds-ot200.o obj-$(CONFIG_LEDS_FSG) += leds-fsg.o obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o +obj-$(CONFIG_LEDS_PCA9633) += leds-pca9633.o obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c new file mode 100644 index 0000000..80cb61a --- /dev/null +++ b/drivers/leds/leds-pca9633.c @@ -0,0 +1,195 @@ +/* + * Copyright 2011 bct electronic GmbH + * + * Author: Peter Meerwald + * + * Based on leds-pca955x.c + * + * This file is subject to the terms and conditions of version 2 of + * the GNU General Public License. See the file COPYING in the main + * directory of this archive for more details. + * + * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62) + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* LED select registers determine the source that drives LED outputs */ +#define PCA9633_LED_OFF 0x0 /* LED driver off */ +#define PCA9633_LED_ON 0x1 /* LED driver on */ +#define PCA9633_LED_PWM 0x2 /* Controlled through PWM */ +#define PCA9633_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */ + +#define PCA9633_MODE1 0x00 +#define PCA9633_MODE2 0x01 +#define PCA9633_PWM_BASE 0x02 +#define PCA9633_LEDOUT 0x08 + +static const struct i2c_device_id pca9633_id[] = { + { "pca9633", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, pca9633_id); + +struct pca9633_led { + struct i2c_client *client; + struct work_struct work; + enum led_brightness brightness; + struct led_classdev led_cdev; + int led_num; /* 0 .. 3 potentially */ + char name[32]; +}; + +static void pca9633_led_work(struct work_struct *work) +{ + struct pca9633_led *pca9633 = container_of(work, + struct pca9633_led, work); + u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT); + int shift = 2 * pca9633->led_num; + u8 mask = 0x3 << shift; + + switch (pca9633->brightness) { + case LED_FULL: + i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, + (ledout & ~mask) | (PCA9633_LED_ON << shift)); + break; + case LED_OFF: + i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, + ledout & ~mask); + break; + default: + i2c_smbus_write_byte_data(pca9633->client, + PCA9633_PWM_BASE + pca9633->led_num, + pca9633->brightness); + i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, + (ledout & ~mask) | (PCA9633_LED_PWM << shift)); + break; + } +} + +static void pca9633_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct pca9633_led *pca9633; + + pca9633 = container_of(led_cdev, struct pca9633_led, led_cdev); + + pca9633->brightness = value; + + /* + * Must use workqueue for the actual I/O since I2C operations + * can sleep. + */ + schedule_work(&pca9633->work); +} + +static int __devinit pca9633_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pca9633_led *pca9633; + struct i2c_adapter *adapter; + struct led_platform_data *pdata; + int i, err; + + adapter = to_i2c_adapter(client->dev.parent); + pdata = client->dev.platform_data; + + if (pdata) { + if (pdata->num_leds <= 0 || pdata->num_leds > 4) { + dev_err(&client->dev, "board info must claim at most 4 LEDs"); + return -EINVAL; + } + } + + pca9633 = kcalloc(4, sizeof(*pca9633), GFP_KERNEL); + if (!pca9633) + return -ENOMEM; + + i2c_set_clientdata(client, pca9633); + + for (i = 0; i < 4; i++) { + pca9633[i].client = client; + pca9633[i].led_num = i; + + /* Platform data can specify LED names and default triggers */ + if (pdata && i < pdata->num_leds) { + if (pdata->leds[i].name) + snprintf(pca9633[i].name, + sizeof(pca9633[i].name), "pca9633:%s", + pdata->leds[i].name); + if (pdata->leds[i].default_trigger) + pca9633[i].led_cdev.default_trigger = + pdata->leds[i].default_trigger; + } else { + snprintf(pca9633[i].name, sizeof(pca9633[i].name), + "pca9633:%d", i); + } + + pca9633[i].led_cdev.name = pca9633[i].name; + pca9633[i].led_cdev.brightness_set = pca9633_led_set; + + INIT_WORK(&pca9633[i].work, pca9633_led_work); + + err = led_classdev_register(&client->dev, &pca9633[i].led_cdev); + if (err < 0) + goto exit; + } + + /* Disable LED all-call address and set normal mode */ + i2c_smbus_write_byte_data(client, PCA9633_MODE1, 0x00); + + /* Turn off LEDs */ + i2c_smbus_write_byte_data(client, PCA9633_LEDOUT, 0x00); + + return 0; + +exit: + while (i--) { + led_classdev_unregister(&pca9633[i].led_cdev); + cancel_work_sync(&pca9633[i].work); + } + + kfree(pca9633); + + return err; +} + +static int __devexit pca9633_remove(struct i2c_client *client) +{ + struct pca9633_led *pca9633 = i2c_get_clientdata(client); + int i; + + for (i = 0; i < 4; i++) { + led_classdev_unregister(&pca9633[i].led_cdev); + cancel_work_sync(&pca9633[i].work); + } + + kfree(pca9633); + + return 0; +} + +static struct i2c_driver pca9633_driver = { + .driver = { + .name = "leds-pca9633", + .owner = THIS_MODULE, + }, + .probe = pca9633_probe, + .remove = __devexit_p(pca9633_remove), + .id_table = pca9633_id, +}; + +module_i2c_driver(pca9633_driver); + +MODULE_AUTHOR("Peter Meerwald "); +MODULE_DESCRIPTION("PCA9633 LED driver"); +MODULE_LICENSE("GPL v2"); -- cgit v0.10.2 From 16db7f9095bf6bb394c9ddb64e738e64a0fea733 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 23 Mar 2012 15:02:11 -0700 Subject: drivers/leds/leds-gpio.c: use linux/gpio.h rather than asm/gpio.h Direct usage of the asm include has long been deprecated by the introduction of gpiolib. Signed-off-by: Mark Brown Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 7df74cb..f4c470a 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -20,8 +21,6 @@ #include #include -#include - struct gpio_led_data { struct led_classdev cdev; unsigned gpio; -- cgit v0.10.2 From bbe6453204c568723679212f6d0653b92b3d6244 Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:11 -0700 Subject: leds-lm3530: set the max_brightness to 127 Only 7 bits are used for updating the brightness. (register address : A0h) So the max_brightness property of lm3530 should be set to 127. On initializing registers, maximum initial brightness is limited to 'max_brightness'. Division-by-two is removed on updating the brightness. This arithmetic is not necessary because the range of brightness is 0 ~ 127= . Signed-off-by: Milo(Woogyom) Kim Cc: Linus Walleij Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index e59c166..2c32a8c 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -80,6 +80,9 @@ #define LM3530_DEF_ZT_3 (0x33) #define LM3530_DEF_ZT_4 (0x19) +/* 7 bits are used for the brightness : LM3530_BRT_CTRL_REG */ +#define MAX_BRIGHTNESS (127) + struct lm3530_mode_map { const char *mode; enum lm3530_mode mode_val; @@ -207,6 +210,9 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) else brightness = drvdata->brightness = pltfm->brt_val; + if (brightness > drvdata->led_dev.max_brightness) + brightness = drvdata->led_dev.max_brightness; + reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */ reg_val[1] = als_config; /* LM3530_ALS_CONFIG */ reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */ @@ -264,12 +270,12 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev, /* set the brightness in brightness control register*/ err = i2c_smbus_write_byte_data(drvdata->client, - LM3530_BRT_CTRL_REG, brt_val / 2); + LM3530_BRT_CTRL_REG, brt_val); if (err) dev_err(&drvdata->client->dev, "Unable to set brightness: %d\n", err); else - drvdata->brightness = brt_val / 2; + drvdata->brightness = brt_val; if (brt_val == 0) { err = regulator_disable(drvdata->regulator); @@ -380,6 +386,7 @@ static int __devinit lm3530_probe(struct i2c_client *client, drvdata->enable = false; drvdata->led_dev.name = LM3530_LED_DEV; drvdata->led_dev.brightness_set = lm3530_brightness_set; + drvdata->led_dev.max_brightness = MAX_BRIGHTNESS; i2c_set_clientdata(client, drvdata); -- cgit v0.10.2 From e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1 Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:11 -0700 Subject: leds-lm3530: replace i2c_client with led_classdev To get members of lm3530_data, use 'struct led_classdev' rather than 'struct i2c_client'. [akpm@linux-foundation.org: fix 80-column fixes more nicely] Signed-off-by: Milo(Woogyom) Kim Cc: Linus Walleij Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index 2c32a8c..ce79523 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -297,11 +297,11 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev, static ssize_t lm3530_mode_get(struct device *dev, struct device_attribute *attr, char *buf) { - struct i2c_client *client = container_of( - dev->parent, struct i2c_client, dev); - struct lm3530_data *drvdata = i2c_get_clientdata(client); + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lm3530_data *drvdata; int i, len = 0; + drvdata = container_of(led_cdev, struct lm3530_data, led_dev); for (i = 0; i < ARRAY_SIZE(mode_map); i++) if (drvdata->mode == mode_map[i].mode_val) len += sprintf(buf + len, "[%s] ", mode_map[i].mode); @@ -316,12 +316,11 @@ static ssize_t lm3530_mode_get(struct device *dev, static ssize_t lm3530_mode_set(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { - int err; - struct i2c_client *client = container_of( - dev->parent, struct i2c_client, dev); - struct lm3530_data *drvdata = i2c_get_clientdata(client); - int mode; + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lm3530_data *drvdata; + int mode, err; + drvdata = container_of(led_cdev, struct lm3530_data, led_dev); mode = lm3530_get_mode_from_str(buf); if (mode < 0) { dev_err(dev, "Invalid mode\n"); -- cgit v0.10.2 From bb982009d3850759d3f4a4c853f9c456c48b6c2d Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:12 -0700 Subject: leds-lm3530: support pwm input mode * add 'struct lm3530_pwm_data' in the platform data The pwm data is the platform specific functions which generate the pwm. The pwm data is only valid when brightness is pwm input mode. Functions should be implemented by the pwm driver. pwm_set_intensity() : set duty of pwm. pwm_get_intensity() : get current the brightness. * brightness control by pwm If the control mode is pwm, then brightness is changed by the duty of pwm=. So pwm platform function should be called in lm3530_brightness_set(). * do not update brightness register when pwm input mode In pwm input mode, brightness register is not used. If any value is updated in this register, then the led will be off. * when input mode is changed, set duty of pwm to 0 if unnecessary. Signed-off-by: Milo(Woogyom) Kim Cc: Linus Walleij Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index ce79523..a889311 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -157,6 +157,7 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) u32 als_vmin, als_vmax, als_vstep; struct lm3530_platform_data *pltfm = drvdata->pdata; struct i2c_client *client = drvdata->client; + struct lm3530_pwm_data *pwm = &pltfm->pwm_data; gen_config = (pltfm->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) | ((pltfm->max_current & 7) << LM3530_MAX_CURR_SHIFT); @@ -240,6 +241,15 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) } for (i = 0; i < LM3530_REG_MAX; i++) { + /* do not update brightness register when pwm mode */ + if (lm3530_reg[i] == LM3530_BRT_CTRL_REG && + drvdata->mode == LM3530_BL_MODE_PWM) { + if (pwm->pwm_set_intensity) + pwm->pwm_set_intensity(reg_val[i], + drvdata->led_dev.max_brightness); + continue; + } + ret = i2c_smbus_write_byte_data(client, lm3530_reg[i], reg_val[i]); if (ret) @@ -255,6 +265,9 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev, int err; struct lm3530_data *drvdata = container_of(led_cdev, struct lm3530_data, led_dev); + struct lm3530_platform_data *pdata = drvdata->pdata; + struct lm3530_pwm_data *pwm = &pdata->pwm_data; + u8 max_brightness = led_cdev->max_brightness; switch (drvdata->mode) { case LM3530_BL_MODE_MANUAL: @@ -288,6 +301,8 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev, case LM3530_BL_MODE_ALS: break; case LM3530_BL_MODE_PWM: + if (pwm->pwm_set_intensity) + pwm->pwm_set_intensity(brt_val, max_brightness); break; default: break; @@ -318,23 +333,24 @@ static ssize_t lm3530_mode_set(struct device *dev, struct device_attribute { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct lm3530_data *drvdata; + struct lm3530_pwm_data *pwm; + u8 max_brightness; int mode, err; drvdata = container_of(led_cdev, struct lm3530_data, led_dev); + pwm = &drvdata->pdata->pwm_data; + max_brightness = led_cdev->max_brightness; mode = lm3530_get_mode_from_str(buf); if (mode < 0) { dev_err(dev, "Invalid mode\n"); return -EINVAL; } - if (mode == LM3530_BL_MODE_MANUAL) - drvdata->mode = LM3530_BL_MODE_MANUAL; - else if (mode == LM3530_BL_MODE_ALS) - drvdata->mode = LM3530_BL_MODE_ALS; - else if (mode == LM3530_BL_MODE_PWM) { - dev_err(dev, "PWM mode not supported\n"); - return -EINVAL; - } + drvdata->mode = mode; + + /* set pwm to low if unnecessary */ + if (mode != LM3530_BL_MODE_PWM && pwm->pwm_set_intensity) + pwm->pwm_set_intensity(0, max_brightness); err = lm3530_init_registers(drvdata); if (err) { diff --git a/include/linux/led-lm3530.h b/include/linux/led-lm3530.h index 8eb1235..eeae6e7 100644 --- a/include/linux/led-lm3530.h +++ b/include/linux/led-lm3530.h @@ -72,6 +72,12 @@ enum lm3530_als_mode { LM3530_INPUT_CEIL, /* Max of ALS1 and ALS2 */ }; +/* PWM Platform Specific Data */ +struct lm3530_pwm_data { + void (*pwm_set_intensity) (int brightness, int max_brightness); + int (*pwm_get_intensity) (int max_brightness); +}; + /** * struct lm3530_platform_data * @mode: mode of operation i.e. Manual, ALS or PWM @@ -87,6 +93,7 @@ enum lm3530_als_mode { * @als_vmin: als input voltage calibrated for max brightness in mV * @als_vmax: als input voltage calibrated for min brightness in mV * @brt_val: brightness value (0-255) + * @pwm_data: PWM control functions (only valid when the mode is PWM) */ struct lm3530_platform_data { enum lm3530_mode mode; @@ -107,6 +114,8 @@ struct lm3530_platform_data { u32 als_vmax; u8 brt_val; + + struct lm3530_pwm_data pwm_data; }; #endif /* _LINUX_LED_LM3530_H__ */ -- cgit v0.10.2 From 8544d0e3f6cd2d12af6d68992b15a6b3f5d35c2e Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:12 -0700 Subject: leds-lm3530: remove LM3530_ALS_ZONE_REG code LM3530_ALS_ZONE_REG is read-only register. Writing this register is not necessary. Signed-off-by: Milo(Woogyom) Kim Cc: Linus Walleij Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index a889311..d70c879 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -26,7 +26,6 @@ #define LM3530_GEN_CONFIG 0x10 #define LM3530_ALS_CONFIG 0x20 #define LM3530_BRT_RAMP_RATE 0x30 -#define LM3530_ALS_ZONE_REG 0x40 #define LM3530_ALS_IMP_SELECT 0x41 #define LM3530_BRT_CTRL_REG 0xA0 #define LM3530_ALS_ZB0_REG 0x60 @@ -38,7 +37,7 @@ #define LM3530_ALS_Z2T_REG 0x72 #define LM3530_ALS_Z3T_REG 0x73 #define LM3530_ALS_Z4T_REG 0x74 -#define LM3530_REG_MAX 15 +#define LM3530_REG_MAX 14 /* General Control Register */ #define LM3530_EN_I2C_SHIFT (0) @@ -118,7 +117,6 @@ static const u8 lm3530_reg[LM3530_REG_MAX] = { LM3530_GEN_CONFIG, LM3530_ALS_CONFIG, LM3530_BRT_RAMP_RATE, - LM3530_ALS_ZONE_REG, LM3530_ALS_IMP_SELECT, LM3530_BRT_CTRL_REG, LM3530_ALS_ZB0_REG, @@ -217,18 +215,17 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */ reg_val[1] = als_config; /* LM3530_ALS_CONFIG */ reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */ - reg_val[3] = 0x00; /* LM3530_ALS_ZONE_REG */ - reg_val[4] = als_imp_sel; /* LM3530_ALS_IMP_SELECT */ - reg_val[5] = brightness; /* LM3530_BRT_CTRL_REG */ - reg_val[6] = zones[0]; /* LM3530_ALS_ZB0_REG */ - reg_val[7] = zones[1]; /* LM3530_ALS_ZB1_REG */ - reg_val[8] = zones[2]; /* LM3530_ALS_ZB2_REG */ - reg_val[9] = zones[3]; /* LM3530_ALS_ZB3_REG */ - reg_val[10] = LM3530_DEF_ZT_0; /* LM3530_ALS_Z0T_REG */ - reg_val[11] = LM3530_DEF_ZT_1; /* LM3530_ALS_Z1T_REG */ - reg_val[12] = LM3530_DEF_ZT_2; /* LM3530_ALS_Z2T_REG */ - reg_val[13] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */ - reg_val[14] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */ + reg_val[3] = als_imp_sel; /* LM3530_ALS_IMP_SELECT */ + reg_val[4] = brightness; /* LM3530_BRT_CTRL_REG */ + reg_val[5] = zones[0]; /* LM3530_ALS_ZB0_REG */ + reg_val[6] = zones[1]; /* LM3530_ALS_ZB1_REG */ + reg_val[7] = zones[2]; /* LM3530_ALS_ZB2_REG */ + reg_val[8] = zones[3]; /* LM3530_ALS_ZB3_REG */ + reg_val[9] = LM3530_DEF_ZT_0; /* LM3530_ALS_Z0T_REG */ + reg_val[10] = LM3530_DEF_ZT_1; /* LM3530_ALS_Z1T_REG */ + reg_val[11] = LM3530_DEF_ZT_2; /* LM3530_ALS_Z2T_REG */ + reg_val[12] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */ + reg_val[13] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */ if (!drvdata->enable) { ret = regulator_enable(drvdata->regulator); -- cgit v0.10.2 From 99ad98d25961487d83ac4afac0375fe1f3e5c883 Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Fri, 23 Mar 2012 15:02:13 -0700 Subject: leds-lm3530: replace pltfm with pdata Use 'pdata' rather than 'pltfm' in lm3530_init_registers(). Signed-off-by: Milo(Woogyom) Kim Cc: Linus Walleij Cc: Richard Purdie Cc: Axel Lin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index d70c879..9f49d955 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -153,28 +153,28 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) u8 reg_val[LM3530_REG_MAX]; u8 zones[LM3530_ALS_ZB_MAX]; u32 als_vmin, als_vmax, als_vstep; - struct lm3530_platform_data *pltfm = drvdata->pdata; + struct lm3530_platform_data *pdata = drvdata->pdata; struct i2c_client *client = drvdata->client; - struct lm3530_pwm_data *pwm = &pltfm->pwm_data; + struct lm3530_pwm_data *pwm = &pdata->pwm_data; - gen_config = (pltfm->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) | - ((pltfm->max_current & 7) << LM3530_MAX_CURR_SHIFT); + gen_config = (pdata->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) | + ((pdata->max_current & 7) << LM3530_MAX_CURR_SHIFT); if (drvdata->mode == LM3530_BL_MODE_MANUAL || drvdata->mode == LM3530_BL_MODE_ALS) gen_config |= (LM3530_ENABLE_I2C); if (drvdata->mode == LM3530_BL_MODE_ALS) { - if (pltfm->als_vmax == 0) { - pltfm->als_vmin = 0; - pltfm->als_vmax = LM3530_ALS_WINDOW_mV; + if (pdata->als_vmax == 0) { + pdata->als_vmin = 0; + pdata->als_vmax = LM3530_ALS_WINDOW_mV; } - als_vmin = pltfm->als_vmin; - als_vmax = pltfm->als_vmax; + als_vmin = pdata->als_vmin; + als_vmax = pdata->als_vmax; if ((als_vmax - als_vmin) > LM3530_ALS_WINDOW_mV) - pltfm->als_vmax = als_vmax = + pdata->als_vmax = als_vmax = als_vmin + LM3530_ALS_WINDOW_mV; /* n zone boundary makes n+1 zones */ @@ -186,28 +186,28 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) / 1000; als_config = - (pltfm->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) | + (pdata->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) | (LM3530_ENABLE_ALS) | - (pltfm->als_input_mode << LM3530_ALS_SEL_SHIFT); + (pdata->als_input_mode << LM3530_ALS_SEL_SHIFT); als_imp_sel = - (pltfm->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) | - (pltfm->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT); + (pdata->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) | + (pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT); } if (drvdata->mode == LM3530_BL_MODE_PWM) gen_config |= (LM3530_ENABLE_PWM) | - (pltfm->pwm_pol_hi << LM3530_PWM_POL_SHIFT) | + (pdata->pwm_pol_hi << LM3530_PWM_POL_SHIFT) | (LM3530_ENABLE_PWM_SIMPLE); - brt_ramp = (pltfm->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) | - (pltfm->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT); + brt_ramp = (pdata->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) | + (pdata->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT); if (drvdata->brightness) brightness = drvdata->brightness; else - brightness = drvdata->brightness = pltfm->brt_val; + brightness = drvdata->brightness = pdata->brt_val; if (brightness > drvdata->led_dev.max_brightness) brightness = drvdata->led_dev.max_brightness; -- cgit v0.10.2 From 1a1278da5ccef255075c03dccc567d46e162c674 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 23 Mar 2012 15:02:13 -0700 Subject: drivers/leds/leds-pca9633.c: remove unused 'adapter' variable Signed-off-by: Axel Lin Cc: Peter Meerwald Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c index 80cb61a..d8926fd 100644 --- a/drivers/leds/leds-pca9633.c +++ b/drivers/leds/leds-pca9633.c @@ -96,11 +96,9 @@ static int __devinit pca9633_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct pca9633_led *pca9633; - struct i2c_adapter *adapter; struct led_platform_data *pdata; int i, err; - adapter = to_i2c_adapter(client->dev.parent); pdata = client->dev.platform_data; if (pdata) { -- cgit v0.10.2 From cea694ca3d0894ee97482be1f22b822dc948c66f Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 23 Mar 2012 15:02:13 -0700 Subject: drivers/leds/leds-lm3530.c: move the code setting gen_config to one place Improve the readability by moving the code setting gen_config to one place. [akpm@linux-foundation.org: fix some patch skew] Signed-off-by: Axel Lin Cc: Shreshtha Kumar Sahu Cc: "Milo(Woogyom) Kim" Cc: Richard Purdie Acked-by: Linus Walleij Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index 9f49d955..968fd5f 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -160,9 +160,16 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) gen_config = (pdata->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) | ((pdata->max_current & 7) << LM3530_MAX_CURR_SHIFT); - if (drvdata->mode == LM3530_BL_MODE_MANUAL || - drvdata->mode == LM3530_BL_MODE_ALS) - gen_config |= (LM3530_ENABLE_I2C); + switch (drvdata->mode) { + case LM3530_BL_MODE_MANUAL: + case LM3530_BL_MODE_ALS: + gen_config |= LM3530_ENABLE_I2C; + break; + case LM3530_BL_MODE_PWM: + gen_config |= LM3530_ENABLE_PWM | LM3530_ENABLE_PWM_SIMPLE | + (pdata->pwm_pol_hi << LM3530_PWM_POL_SHIFT); + break; + } if (drvdata->mode == LM3530_BL_MODE_ALS) { if (pdata->als_vmax == 0) { @@ -196,11 +203,6 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) } - if (drvdata->mode == LM3530_BL_MODE_PWM) - gen_config |= (LM3530_ENABLE_PWM) | - (pdata->pwm_pol_hi << LM3530_PWM_POL_SHIFT) | - (LM3530_ENABLE_PWM_SIMPLE); - brt_ramp = (pdata->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) | (pdata->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT); -- cgit v0.10.2 From a403d930c58eb8448f81fa90c125ac36dc8ef89d Mon Sep 17 00:00:00 2001 From: Bryan Wu Date: Fri, 23 Mar 2012 15:02:14 -0700 Subject: led-class: change back LEDS_CLASS to tristate instead of bool After moving some core functions to led-core.c, led-class.c can be built as module again. Signed-off-by: Bryan Wu Acked-by: Richard Purdie Acked-by: Linus Walleij Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index e2ac190..589ba02 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -17,7 +17,7 @@ menuconfig NEW_LEDS if NEW_LEDS config LEDS_CLASS - bool "LED Class Support" + tristate "LED Class Support" help This option enables the led sysfs class in /sys/class/leds. You'll need this to do anything useful with LEDs. If unsure, say N. diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 0c8739c..5bff843 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -110,50 +110,6 @@ static void led_timer_function(unsigned long data) mod_timer(&led_cdev->blink_timer, jiffies + msecs_to_jiffies(delay)); } -static void led_stop_software_blink(struct led_classdev *led_cdev) -{ - /* deactivate previous settings */ - del_timer_sync(&led_cdev->blink_timer); - led_cdev->blink_delay_on = 0; - led_cdev->blink_delay_off = 0; -} - -static void led_set_software_blink(struct led_classdev *led_cdev, - unsigned long delay_on, - unsigned long delay_off) -{ - int current_brightness; - - current_brightness = led_get_brightness(led_cdev); - if (current_brightness) - led_cdev->blink_brightness = current_brightness; - if (!led_cdev->blink_brightness) - led_cdev->blink_brightness = led_cdev->max_brightness; - - if (led_get_trigger_data(led_cdev) && - delay_on == led_cdev->blink_delay_on && - delay_off == led_cdev->blink_delay_off) - return; - - led_stop_software_blink(led_cdev); - - led_cdev->blink_delay_on = delay_on; - led_cdev->blink_delay_off = delay_off; - - /* never on - don't blink */ - if (!delay_on) - return; - - /* never off - just set to brightness */ - if (!delay_off) { - led_set_brightness(led_cdev, led_cdev->blink_brightness); - return; - } - - mod_timer(&led_cdev->blink_timer, jiffies + 1); -} - - /** * led_classdev_suspend - suspend an led_classdev. * @led_cdev: the led_classdev to suspend. @@ -262,32 +218,6 @@ void led_classdev_unregister(struct led_classdev *led_cdev) } EXPORT_SYMBOL_GPL(led_classdev_unregister); -void led_blink_set(struct led_classdev *led_cdev, - unsigned long *delay_on, - unsigned long *delay_off) -{ - del_timer_sync(&led_cdev->blink_timer); - - if (led_cdev->blink_set && - !led_cdev->blink_set(led_cdev, delay_on, delay_off)) - return; - - /* blink with 1 Hz as default if nothing specified */ - if (!*delay_on && !*delay_off) - *delay_on = *delay_off = 500; - - led_set_software_blink(led_cdev, *delay_on, *delay_off); -} -EXPORT_SYMBOL(led_blink_set); - -void led_brightness_set(struct led_classdev *led_cdev, - enum led_brightness brightness) -{ - led_stop_software_blink(led_cdev); - led_cdev->brightness_set(led_cdev, brightness); -} -EXPORT_SYMBOL(led_brightness_set); - static int __init leds_init(void) { leds_class = class_create(THIS_MODULE, "leds"); diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c index 016d19f..d686004 100644 --- a/drivers/leds/led-core.c +++ b/drivers/leds/led-core.c @@ -23,3 +23,73 @@ EXPORT_SYMBOL_GPL(leds_list_lock); LIST_HEAD(leds_list); EXPORT_SYMBOL_GPL(leds_list); + +static void led_stop_software_blink(struct led_classdev *led_cdev) +{ + /* deactivate previous settings */ + del_timer_sync(&led_cdev->blink_timer); + led_cdev->blink_delay_on = 0; + led_cdev->blink_delay_off = 0; +} + +static void led_set_software_blink(struct led_classdev *led_cdev, + unsigned long delay_on, + unsigned long delay_off) +{ + int current_brightness; + + current_brightness = led_get_brightness(led_cdev); + if (current_brightness) + led_cdev->blink_brightness = current_brightness; + if (!led_cdev->blink_brightness) + led_cdev->blink_brightness = led_cdev->max_brightness; + + if (led_get_trigger_data(led_cdev) && + delay_on == led_cdev->blink_delay_on && + delay_off == led_cdev->blink_delay_off) + return; + + led_stop_software_blink(led_cdev); + + led_cdev->blink_delay_on = delay_on; + led_cdev->blink_delay_off = delay_off; + + /* never on - don't blink */ + if (!delay_on) + return; + + /* never off - just set to brightness */ + if (!delay_off) { + led_set_brightness(led_cdev, led_cdev->blink_brightness); + return; + } + + mod_timer(&led_cdev->blink_timer, jiffies + 1); +} + + +void led_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + del_timer_sync(&led_cdev->blink_timer); + + if (led_cdev->blink_set && + !led_cdev->blink_set(led_cdev, delay_on, delay_off)) + return; + + /* blink with 1 Hz as default if nothing specified */ + if (!*delay_on && !*delay_off) + *delay_on = *delay_off = 500; + + led_set_software_blink(led_cdev, *delay_on, *delay_off); +} +EXPORT_SYMBOL(led_blink_set); + +void led_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + led_stop_software_blink(led_cdev); + led_cdev->brightness_set(led_cdev, brightness); +} +EXPORT_SYMBOL(led_brightness_set); -- cgit v0.10.2 From f43804bf5f9ae1e60077c5f22aee5fdfe4f09837 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 23 Mar 2012 15:02:14 -0700 Subject: string: memchr_inv() speed improvements - Generate a 64-bit pattern more efficiently memchr_inv needs to generate a 64-bit pattern filled with a target character. The operation can be done by more efficient way. - Don't call the slow check_bytes() if the memory area is 64-bit aligned memchr_inv compares contiguous 64-bit words with the 64-bit pattern as much as possible. The outside of the region is checked by check_bytes() that scans for each byte. Unfortunately, the first 64-bit word is unexpectedly scanned by check_bytes() even if the memory area is aligned to a 64-bit boundary. Both changes were originally suggested by Eric Dumazet. Signed-off-by: Akinobu Mita Suggested-by: Eric Dumazet Cc: Brian Norris Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/string.c b/lib/string.c index dc4a863..3a03782 100644 --- a/lib/string.c +++ b/lib/string.c @@ -785,12 +785,24 @@ void *memchr_inv(const void *start, int c, size_t bytes) if (bytes <= 16) return check_bytes8(start, value, bytes); - value64 = value | value << 8 | value << 16 | value << 24; - value64 = (value64 & 0xffffffff) | value64 << 32; - prefix = 8 - ((unsigned long)start) % 8; + value64 = value; +#if defined(ARCH_HAS_FAST_MULTIPLIER) && BITS_PER_LONG == 64 + value64 *= 0x0101010101010101; +#elif defined(ARCH_HAS_FAST_MULTIPLIER) + value64 *= 0x01010101; + value64 |= value64 << 32; +#else + value64 |= value64 << 8; + value64 |= value64 << 16; + value64 |= value64 << 32; +#endif + prefix = (unsigned long)start % 8; if (prefix) { - u8 *r = check_bytes8(start, value, prefix); + u8 *r; + + prefix = 8 - prefix; + r = check_bytes8(start, value, prefix); if (r) return r; start += prefix; -- cgit v0.10.2 From f42240d729b97a01e863b8c24177ec4e54885357 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Fri, 23 Mar 2012 15:02:14 -0700 Subject: prio_tree: remove unnecessary code in prio_tree_replace Remove the code since 'node' has already been initialized in the begin of the function Signed-off-by: Xiao Guangrong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/prio_tree.c b/lib/prio_tree.c index ccfd850..423eba8 100644 --- a/lib/prio_tree.c +++ b/lib/prio_tree.c @@ -151,7 +151,6 @@ struct prio_tree_node *prio_tree_replace(struct prio_tree_root *root, * We can reduce root->index_bits here. However, it is complex * and does not help much to improve performance (IMO). */ - node->parent = node; root->prio_tree_node = node; } else { node->parent = old->parent; -- cgit v0.10.2 From f35368dd1cef11cdd310b07c74d74f45e3469c64 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Fri, 23 Mar 2012 15:02:15 -0700 Subject: prio_tree: cleanup prio_tree_left()/prio_tree_right() Introduce iter_walk_down()/iter_walk_up() to remove the common code between prio_tree_left() and prio_tree_right(). Signed-off-by: Xiao Guangrong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/prio_tree.c b/lib/prio_tree.c index 423eba8..888e8b3 100644 --- a/lib/prio_tree.c +++ b/lib/prio_tree.c @@ -304,6 +304,40 @@ void prio_tree_remove(struct prio_tree_root *root, struct prio_tree_node *node) cur = prio_tree_replace(root, cur->parent, cur); } +static void iter_walk_down(struct prio_tree_iter *iter) +{ + iter->mask >>= 1; + if (iter->mask) { + if (iter->size_level) + iter->size_level++; + return; + } + + if (iter->size_level) { + BUG_ON(!prio_tree_left_empty(iter->cur)); + BUG_ON(!prio_tree_right_empty(iter->cur)); + iter->size_level++; + iter->mask = ULONG_MAX; + } else { + iter->size_level = 1; + iter->mask = 1UL << (BITS_PER_LONG - 1); + } +} + +static void iter_walk_up(struct prio_tree_iter *iter) +{ + if (iter->mask == ULONG_MAX) + iter->mask = 1UL; + else if (iter->size_level == 1) + iter->mask = 1UL; + else + iter->mask <<= 1; + if (iter->size_level) + iter->size_level--; + if (!iter->size_level && (iter->value & iter->mask)) + iter->value ^= iter->mask; +} + /* * Following functions help to enumerate all prio_tree_nodes in the tree that * overlap with the input interval X [radix_index, heap_index]. The enumeration @@ -322,21 +356,7 @@ static struct prio_tree_node *prio_tree_left(struct prio_tree_iter *iter, if (iter->r_index <= *h_index) { iter->cur = iter->cur->left; - iter->mask >>= 1; - if (iter->mask) { - if (iter->size_level) - iter->size_level++; - } else { - if (iter->size_level) { - BUG_ON(!prio_tree_left_empty(iter->cur)); - BUG_ON(!prio_tree_right_empty(iter->cur)); - iter->size_level++; - iter->mask = ULONG_MAX; - } else { - iter->size_level = 1; - iter->mask = 1UL << (BITS_PER_LONG - 1); - } - } + iter_walk_down(iter); return iter->cur; } @@ -363,22 +383,7 @@ static struct prio_tree_node *prio_tree_right(struct prio_tree_iter *iter, if (iter->r_index <= *h_index) { iter->cur = iter->cur->right; - iter->mask >>= 1; - iter->value = value; - if (iter->mask) { - if (iter->size_level) - iter->size_level++; - } else { - if (iter->size_level) { - BUG_ON(!prio_tree_left_empty(iter->cur)); - BUG_ON(!prio_tree_right_empty(iter->cur)); - iter->size_level++; - iter->mask = ULONG_MAX; - } else { - iter->size_level = 1; - iter->mask = 1UL << (BITS_PER_LONG - 1); - } - } + iter_walk_down(iter); return iter->cur; } @@ -388,16 +393,7 @@ static struct prio_tree_node *prio_tree_right(struct prio_tree_iter *iter, static struct prio_tree_node *prio_tree_parent(struct prio_tree_iter *iter) { iter->cur = iter->cur->parent; - if (iter->mask == ULONG_MAX) - iter->mask = 1UL; - else if (iter->size_level == 1) - iter->mask = 1UL; - else - iter->mask <<= 1; - if (iter->size_level) - iter->size_level--; - if (!iter->size_level && (iter->value & iter->mask)) - iter->value ^= iter->mask; + iter_walk_up(iter); return iter->cur; } -- cgit v0.10.2 From 742245d5c2ebd75c2a002f8fc2afbdc5c26edd8c Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Fri, 23 Mar 2012 15:02:15 -0700 Subject: prio_tree: simplify prio_tree_expand() In current code, the deleted-node is recorded from first to last, actually, we can directly attach these node on 'node' we will insert as the left child, it can let the code more readable. Signed-off-by: Xiao Guangrong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/prio_tree.c b/lib/prio_tree.c index 888e8b3..928482b 100644 --- a/lib/prio_tree.c +++ b/lib/prio_tree.c @@ -94,43 +94,33 @@ static inline unsigned long prio_tree_maxindex(unsigned int bits) static struct prio_tree_node *prio_tree_expand(struct prio_tree_root *root, struct prio_tree_node *node, unsigned long max_heap_index) { - struct prio_tree_node *first = NULL, *prev, *last = NULL; + struct prio_tree_node *prev; if (max_heap_index > prio_tree_maxindex(root->index_bits)) root->index_bits++; + prev = node; + INIT_PRIO_TREE_NODE(node); + while (max_heap_index > prio_tree_maxindex(root->index_bits)) { + struct prio_tree_node *tmp = root->prio_tree_node; + root->index_bits++; if (prio_tree_empty(root)) continue; - if (first == NULL) { - first = root->prio_tree_node; - prio_tree_remove(root, root->prio_tree_node); - INIT_PRIO_TREE_NODE(first); - last = first; - } else { - prev = last; - last = root->prio_tree_node; - prio_tree_remove(root, root->prio_tree_node); - INIT_PRIO_TREE_NODE(last); - prev->left = last; - last->parent = prev; - } - } - - INIT_PRIO_TREE_NODE(node); + prio_tree_remove(root, root->prio_tree_node); + INIT_PRIO_TREE_NODE(tmp); - if (first) { - node->left = first; - first->parent = node; - } else - last = node; + prev->left = tmp; + tmp->parent = prev; + prev = tmp; + } if (!prio_tree_empty(root)) { - last->left = root->prio_tree_node; - last->left->parent = last; + prev->left = root->prio_tree_node; + prev->left->parent = prev; } root->prio_tree_node = node; -- cgit v0.10.2 From 97e834c5040b85e133d8d922111a62b2b853a406 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Fri, 23 Mar 2012 15:02:15 -0700 Subject: prio_tree: introduce prio_set_parent() Introduce prio_set_parent() to abstract the operation which is used to attach the node to its parent. Signed-off-by: Xiao Guangrong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/prio_tree.c b/lib/prio_tree.c index 928482b..8d443af 100644 --- a/lib/prio_tree.c +++ b/lib/prio_tree.c @@ -85,6 +85,17 @@ static inline unsigned long prio_tree_maxindex(unsigned int bits) return index_bits_to_maxindex[bits - 1]; } +static void prio_set_parent(struct prio_tree_node *parent, + struct prio_tree_node *child, bool left) +{ + if (left) + parent->left = child; + else + parent->right = child; + + child->parent = parent; +} + /* * Extend a priority search tree so that it can store a node with heap_index * max_heap_index. In the worst case, this algorithm takes O((log n)^2). @@ -113,15 +124,12 @@ static struct prio_tree_node *prio_tree_expand(struct prio_tree_root *root, prio_tree_remove(root, root->prio_tree_node); INIT_PRIO_TREE_NODE(tmp); - prev->left = tmp; - tmp->parent = prev; + prio_set_parent(prev, tmp, true); prev = tmp; } - if (!prio_tree_empty(root)) { - prev->left = root->prio_tree_node; - prev->left->parent = prev; - } + if (!prio_tree_empty(root)) + prio_set_parent(prev, root->prio_tree_node, true); root->prio_tree_node = node; return node; @@ -142,23 +150,14 @@ struct prio_tree_node *prio_tree_replace(struct prio_tree_root *root, * and does not help much to improve performance (IMO). */ root->prio_tree_node = node; - } else { - node->parent = old->parent; - if (old->parent->left == old) - old->parent->left = node; - else - old->parent->right = node; - } + } else + prio_set_parent(old->parent, node, old->parent->left == old); - if (!prio_tree_left_empty(old)) { - node->left = old->left; - old->left->parent = node; - } + if (!prio_tree_left_empty(old)) + prio_set_parent(node, old->left, true); - if (!prio_tree_right_empty(old)) { - node->right = old->right; - old->right->parent = node; - } + if (!prio_tree_right_empty(old)) + prio_set_parent(node, old->right, false); return old; } @@ -218,16 +217,14 @@ struct prio_tree_node *prio_tree_insert(struct prio_tree_root *root, if (index & mask) { if (prio_tree_right_empty(cur)) { INIT_PRIO_TREE_NODE(node); - cur->right = node; - node->parent = cur; + prio_set_parent(cur, node, false); return res; } else cur = cur->right; } else { if (prio_tree_left_empty(cur)) { INIT_PRIO_TREE_NODE(node); - cur->left = node; - node->parent = cur; + prio_set_parent(cur, node, true); return res; } else cur = cur->left; -- cgit v0.10.2 From 6061d949dd984c762ee272a88e77699fa675d1c8 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:02:16 -0700 Subject: include/ and checkpatch: prefer __scanf to __attribute__((format(scanf,...) It's equivalent to __printf, so prefer __scanf. Signed-off-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 3fd17c2..e5834aa 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -87,7 +87,8 @@ */ #define __pure __attribute__((pure)) #define __aligned(x) __attribute__((aligned(x))) -#define __printf(a,b) __attribute__((format(printf,a,b))) +#define __printf(a, b) __attribute__((format(printf, a, b))) +#define __scanf(a, b) __attribute__((format(scanf, a, b))) #define noinline __attribute__((noinline)) #define __attribute_const__ __attribute__((__const__)) #define __maybe_unused __attribute__((unused)) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index d801acb..f2085b5 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -328,10 +328,10 @@ extern __printf(2, 3) char *kasprintf(gfp_t gfp, const char *fmt, ...); extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args); -extern int sscanf(const char *, const char *, ...) - __attribute__ ((format (scanf, 2, 3))); -extern int vsscanf(const char *, const char *, va_list) - __attribute__ ((format (scanf, 2, 0))); +extern __scanf(2, 3) +int sscanf(const char *, const char *, ...); +extern __scanf(2, 0) +int vsscanf(const char *, const char *, va_list); extern int get_option(char **str, int *pint); extern char *get_options(const char *str, int nints, int *ints); diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h index e8c599b..0a7515c 100644 --- a/include/xen/xenbus.h +++ b/include/xen/xenbus.h @@ -139,9 +139,9 @@ int xenbus_transaction_start(struct xenbus_transaction *t); int xenbus_transaction_end(struct xenbus_transaction t, int abort); /* Single read and scanf: returns -errno or num scanned if > 0. */ +__scanf(4, 5) int xenbus_scanf(struct xenbus_transaction t, - const char *dir, const char *node, const char *fmt, ...) - __attribute__((format(scanf, 4, 5))); + const char *dir, const char *node, const char *fmt, ...); /* Single printf and write: returns -errno or 0. */ __printf(4, 5) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index a3b9782..89d24b3 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3123,6 +3123,12 @@ sub process { "__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr); } +# Check for __attribute__ format(scanf, prefer __scanf + if ($line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\b/) { + WARN("PREFER_SCANF", + "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr); + } + # check for sizeof(&) if ($line =~ /\bsizeof\s*\(\s*\&/) { WARN("SIZEOF_ADDRESS", -- cgit v0.10.2 From d1fe9c099cecc6e49324355f1b15573e9dbbe0f9 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:02:16 -0700 Subject: checkpatch: add some --strict coding style checks Argument alignment across multiple lines should match the open parenthesis. Logical continuations should be at the end of the previous line, not the start of a new line. These are not required by CodingStyle so make the tests active only when using --strict. Improved by some examples from Bruce Allen. Signed-off-by: Joe Perches Cc: "Bruce W. Allen" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 89d24b3..308e401 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -330,10 +330,15 @@ sub build_types { } build_types(); -our $match_balanced_parentheses = qr/(\((?:[^\(\)]+|(-1))*\))/; our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*}; -our $LvalOrFunc = qr{($Lval)\s*($match_balanced_parentheses{0,1})\s*}; + +# Using $balanced_parens, $LvalOrFunc, or $FuncArg +# requires at least perl version v5.10.0 +# Any use must be runtime checked with $^V + +our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/; +our $LvalOrFunc = qr{($Lval)\s*($balanced_parens{0,1})\s*}; our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant)}; sub deparenthesize { @@ -1330,6 +1335,36 @@ sub check_absolute_file { } } +sub pos_last_openparen { + my ($line) = @_; + + my $pos = 0; + + my $opens = $line =~ tr/\(/\(/; + my $closes = $line =~ tr/\)/\)/; + + my $last_openparen = 0; + + if (($opens == 0) || ($closes >= $opens)) { + return -1; + } + + my $len = length($line); + + for ($pos = 0; $pos < $len; $pos++) { + my $string = substr($line, $pos); + if ($string =~ /^($FuncArg|$balanced_parens)/) { + $pos += length($1) - 1; + } elsif (substr($line, $pos, 1) eq '(') { + $last_openparen = $pos; + } elsif (index($string, '(') == -1) { + last; + } + } + + return $last_openparen + 1; +} + sub process { my $filename = shift; @@ -1783,6 +1818,37 @@ sub process { "please, no space before tabs\n" . $herevet); } +# check for && or || at the start of a line + if ($rawline =~ /^\+\s*(&&|\|\|)/) { + CHK("LOGICAL_CONTINUATIONS", + "Logical continuations should be on the previous line\n" . $hereprev); + } + +# check multi-line statement indentation matches previous line + if ($^V && $^V ge 5.10.0 && + $prevline =~ /^\+(\t*)(if \(|$Ident\().*(\&\&|\|\||,)\s*$/) { + $prevline =~ /^\+(\t*)(.*)$/; + my $oldindent = $1; + my $rest = $2; + + my $pos = pos_last_openparen($rest); + if ($pos >= 0) { + $line =~ /^\+([ \t]*)/; + my $newindent = $1; + + my $goodtabindent = $oldindent . + "\t" x ($pos / 8) . + " " x ($pos % 8); + my $goodspaceindent = $oldindent . " " x $pos; + + if ($newindent ne $goodtabindent && + $newindent ne $goodspaceindent) { + CHK("PARENTHESIS_ALIGNMENT", + "Alignment should match open parenthesis\n" . $hereprev); + } + } + } + # check for spaces at the beginning of a line. # Exceptions: # 1) within comments @@ -3142,12 +3208,13 @@ sub process { } # Check for misused memsets - if (defined $stat && + if ($^V && $^V ge 5.10.0 && + defined $stat && $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*$FuncArg\s*\)/s) { my $ms_addr = $2; - my $ms_val = $8; - my $ms_size = $14; + my $ms_val = $7; + my $ms_size = $12; if ($ms_size =~ /^(0x|)0$/i) { ERROR("MEMSET", @@ -3159,17 +3226,18 @@ sub process { } # typecasts on min/max could be min_t/max_t - if (defined $stat && + if ($^V && $^V ge 5.10.0 && + defined $stat && $stat =~ /^\+(?:.*?)\b(min|max)\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) { - if (defined $2 || defined $8) { + if (defined $2 || defined $7) { my $call = $1; my $cast1 = deparenthesize($2); my $arg1 = $3; - my $cast2 = deparenthesize($8); - my $arg2 = $9; + my $cast2 = deparenthesize($7); + my $arg2 = $8; my $cast; - if ($cast1 ne "" && $cast2 ne "") { + if ($cast1 ne "" && $cast2 ne "" && $cast1 ne $cast2) { $cast = "$cast1 or $cast2"; } elsif ($cast1 ne "") { $cast = $cast1; @@ -3391,6 +3459,12 @@ sub process { } if ($quiet == 0) { + + if ($^V lt 5.10.0) { + print("NOTE: perl $^V is not modern enough to detect all possible issues.\n"); + print("An upgrade to at least perl v5.10.0 is suggested.\n\n"); + } + # If there were whitespace errors which cleanpatch can fix # then suggest that. if ($rpt_cleaners) { -- cgit v0.10.2 From 11232688ec41a507cdb476fc4e88aff8a3a34c3c Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Fri, 23 Mar 2012 15:02:17 -0700 Subject: checkpatch.pl: be silent when -q and --ignore is given Fix checkpatch.pl when both -q and --ignore are given and prevents it from printing a NOTE: Ignored message types: blah messages. E.g., if I use -q --ignore PREFER_PACKED,PREFER_ALIGNED, i see: NOTE: Ignored message types: PREFER_ALIGNED PREFER_PACKED It makes no sense to print this when -q is given. Signed-off-by: Artem Bityutskiy Cc: Andy Whitcroft Cc: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 308e401..0ee37bf 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3474,13 +3474,12 @@ sub process { } } - if (keys %ignore_type) { + if ($quiet == 0 && keys %ignore_type) { print "NOTE: Ignored message types:"; foreach my $ignore (sort keys %ignore_type) { print " $ignore"; } - print "\n"; - print "\n" if ($quiet == 0); + print "\n\n"; } if ($clean == 1 && $quiet == 0) { -- cgit v0.10.2 From daebc534ac15f991961a5bb433e515988220e9bf Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Fri, 23 Mar 2012 15:02:17 -0700 Subject: checkpatch: catch [ ... ] usage when not at the beginning of definition Handle the [ A ... B ] form deeper into a definition, for example: static const unsigned char pci_irq_swizzle[2][PCI_MAX_DEVICES] = { {0, 0, 0, 0, 0, 0, 0, 27, 27, [9 ... PCI_MAX_DEVICES - 1] = 0 }, {0, 0, 0, 0, 0, 0, 0, 29, 29, [9 ... PCI_MAX_DEVICES - 1] = 0 }, }; Reported-by: Marek Vasut Signed-off-by: Andy Whitcroft Cc: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 0ee37bf..061c28e 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2391,7 +2391,7 @@ sub process { my ($where, $prefix) = ($-[1], $1); if ($prefix !~ /$Type\s+$/ && ($where != 0 || $prefix !~ /^.\s+$/) && - $prefix !~ /{\s+$/) { + $prefix !~ /[{,]\s+$/) { ERROR("BRACKET_SPACE", "space prohibited before open square bracket '['\n" . $herecurr); } -- cgit v0.10.2 From b9df76ac76da351cd4f6ba52369e9a64e9ab686d Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Fri, 23 Mar 2012 15:02:17 -0700 Subject: checkpatch: allow simple character constants in #defines Signed-off-by: Andy Whitcroft Cc: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 061c28e..95ba30a 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2911,6 +2911,7 @@ sub process { $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(), $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo(); $dstat !~ /^(?:$Ident|-?$Constant)$/ && # 10 // foo() + $dstat !~ /^'X'$/ && # character constants $dstat !~ /$exceptions/ && $dstat !~ /^\.$Ident\s*=/ && # .foo = $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ && # do {...} while (...); // do {...} while (...) -- cgit v0.10.2 From e45bab8ebfee65ba89b228c1e7c64a6cb0812124 Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Fri, 23 Mar 2012 15:02:18 -0700 Subject: checkpatch: handle string concatenation in simple #defines Adjacent strings indicate concatentation, therefore look at identifiers directly adjacent to literal strings as strings too. This allows us to better detect the form below and accept it as a simple constant: #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt Signed-off-by: Andy Whitcroft Cc: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 95ba30a..01a6598 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2894,6 +2894,12 @@ sub process { { } + # Flatten any obvious string concatentation. + while ($dstat =~ s/("X*")\s*$Ident/$1/ || + $dstat =~ s/$Ident\s*("X*")/$1/) + { + } + my $exceptions = qr{ $Declare| module_param_named| -- cgit v0.10.2 From fd1b57ac73f169a5ba7a9569989aad40184f6340 Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Fri, 23 Mar 2012 15:02:18 -0700 Subject: checkpatch: high precedence operators do not require additional parentheses in #defines With any very high precedence operator it is not necessary to enforce additional parentheses around simple negated expressions. This prevents us requesting further perentheses around the following: #define PMEM_IS_FREE(id, index) !(pmem[id].bitmap[index].allocated) For now add logical and bitwise not and unary minus. Signed-off-by: Andy Whitcroft Cc: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 01a6598..ec58d31 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2916,7 +2916,7 @@ sub process { if ($dstat ne '' && $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(), $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo(); - $dstat !~ /^(?:$Ident|-?$Constant)$/ && # 10 // foo() + $dstat !~ /^[!~-]?(?:$Ident|$Constant)$/ && # 10 // foo() // !foo // ~foo // -foo $dstat !~ /^'X'$/ && # character constants $dstat !~ /$exceptions/ && $dstat !~ /^\.$Ident\s*=/ && # .foo = -- cgit v0.10.2 From b337d8b82f235d0212f7adcaeb431fd4e688bb98 Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Fri, 23 Mar 2012 15:02:18 -0700 Subject: checkpatch: add [] to type extensions Add [] to a type extensions. Fixes false positives on: .attrs = (struct attribute *[]) { Signed-off-by: Andy Whitcroft Cc: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index ec58d31..07d7184 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -323,7 +323,7 @@ sub build_types { }x; $Type = qr{ $NonptrType - (?:[\s\*]+\s*const|[\s\*]+|(?:\s*\[\s*\])+)? + (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*|\[\])+|(?:\s*\[\s*\])+)? (?:\s+$Inline|\s+$Modifier)* }x; $Declare = qr{(?:$Storage\s+)?$Type}; -- cgit v0.10.2 From aad4f61498314d41d047ea2161b7bd7237b72d33 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:02:19 -0700 Subject: checkpatch: add --strict tests for braces, comments and casts Add some more subjective --strict tests. Add a test for block comments that start with a blank line followed only by a line with just the comment block initiator. Prefer a blank line followed by /* comment... Add a test for unnecessary spaces after a cast. Add a test for symmetric uses of braces in if/else blocks. If one branch needs braces, then all branches should use braces. Signed-off-by: Joe Perches Cc: Andy Whitcroft Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 07d7184..21486c0 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -1849,6 +1849,17 @@ sub process { } } + if ($line =~ /^\+.*\*[ \t]*\)[ \t]+/) { + CHK("SPACING", + "No space is necessary after a cast\n" . $hereprev); + } + + if ($rawline =~ /^\+[ \t]*\/\*[ \t]*$/ && + $prevrawline =~ /^\+[ \t]*$/) { + CHK("BLOCK_COMMENT_STYLE", + "Don't begin block comments with only a /* line, use /* comment...\n" . $hereprev); + } + # check for spaces at the beginning of a line. # Exceptions: # 1) within comments @@ -2961,7 +2972,8 @@ sub process { #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n"; #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n"; if ($#chunks > 0 && $level == 0) { - my $allowed = 0; + my @allowed = (); + my $allow = 0; my $seen = 0; my $herectx = $here . "\n"; my $ln = $linenr - 1; @@ -2972,6 +2984,7 @@ sub process { my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s); my $offset = statement_rawlines($whitespace) - 1; + $allowed[$allow] = 0; #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n"; # We have looked at and allowed this specific line. @@ -2984,23 +2997,34 @@ sub process { $seen++ if ($block =~ /^\s*{/); - #print "cond<$cond> block<$block> allowed<$allowed>\n"; + #print "cond<$cond> block<$block> allowed<$allowed[$allow]>\n"; if (statement_lines($cond) > 1) { #print "APW: ALLOWED: cond<$cond>\n"; - $allowed = 1; + $allowed[$allow] = 1; } if ($block =~/\b(?:if|for|while)\b/) { #print "APW: ALLOWED: block<$block>\n"; - $allowed = 1; + $allowed[$allow] = 1; } if (statement_block_size($block) > 1) { #print "APW: ALLOWED: lines block<$block>\n"; - $allowed = 1; + $allowed[$allow] = 1; } + $allow++; } - if ($seen && !$allowed) { - WARN("BRACES", - "braces {} are not necessary for any arm of this statement\n" . $herectx); + if ($seen) { + my $sum_allowed = 0; + foreach (@allowed) { + $sum_allowed += $_; + } + if ($sum_allowed == 0) { + WARN("BRACES", + "braces {} are not necessary for any arm of this statement\n" . $herectx); + } elsif ($sum_allowed != $allow && + $seen != $allow) { + CHK("BRACES", + "braces {} should be used on all arms of this statement\n" . $herectx); + } } } } -- cgit v0.10.2 From 2c92488ab29886d08766c054afc8dd0f19c724f1 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:02:20 -0700 Subject: checkpatch: warn on use of yield() Using yield() is generally wrong. Warn on its use. Signed-off-by: Joe Perches Cc: Andy Whitcroft Cc: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 21486c0..d1fd466 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3338,6 +3338,12 @@ sub process { "__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr); } +# check for use of yield() + if ($line =~ /\byield\s*\(\s*\)/) { + WARN("YIELD", + "Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n" . $herecurr); + } + # check for semaphores initialized locked if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) { WARN("CONSIDER_COMPLETION", -- cgit v0.10.2 From 6712d85852b348d07301c7480f7eb3312d329143 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 23 Mar 2012 15:02:20 -0700 Subject: checkpatch: whitespace - add/remove blank lines Add blank lines between a few tests, remove an extraneous one. Signed-off-by: Joe Perches Cc: Andy Whitcroft Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index d1fd466..7a2f54a 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3348,18 +3348,20 @@ sub process { if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) { WARN("CONSIDER_COMPLETION", "consider using a completion\n" . $herecurr); - } + # recommend kstrto* over simple_strto* and strict_strto* if ($line =~ /\b((simple|strict)_(strto(l|ll|ul|ull)))\s*\(/) { WARN("CONSIDER_KSTRTO", "$1 is obsolete, use k$3 instead\n" . $herecurr); } + # check for __initcall(), use device_initcall() explicitly please if ($line =~ /^.\s*__initcall\s*\(/) { WARN("USE_DEVICE_INITCALL", "please use device_initcall() instead of __initcall()\n" . $herecurr); } + # check for various ops structs, ensure they are const. my $struct_ops = qr{acpi_dock_ops| address_space_operations| -- cgit v0.10.2 From ca56dc098caf93b5437cd6c4ee49f02aa18f84d6 Mon Sep 17 00:00:00 2001 From: Josh Triplett Date: Fri, 23 Mar 2012 15:02:21 -0700 Subject: checkpatch: check for quoted strings broken across lines checkpatch already makes an exception to the 80-column rule for quoted strings, and Documentation/CodingStyle recommends not splitting quoted strings across lines, because it breaks the ability to grep for the string. Rather than just permitting this, actively warn about quoted strings split across lines. Test case: void context(void) { struct { unsigned magic; const char *strdata; } foo[] = { { 42, "these strings" "do not produce warnings" }, { 256, "though perhaps" "they should" }, }; pr_err("this string" " should produce a warning\n"); pr_err("this multi-line string\n" "should not produce a warning\n"); asm ("this asm\n\t" "should not produce a warning"); } Results of checkpatch on that test case: WARNING: quoted string split across lines + " should produce a warning\n"); total: 0 errors, 1 warnings, 15 lines checked Signed-off-by: Josh Triplett Acked-by: Joe Perches Cc: Andy Whitcroft Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 7a2f54a..de639ee 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -1772,6 +1772,21 @@ sub process { "line over 80 characters\n" . $herecurr); } +# Check for user-visible strings broken across lines, which breaks the ability +# to grep for the string. Limited to strings used as parameters (those +# following an open parenthesis), which almost completely eliminates false +# positives, as well as warning only once per parameter rather than once per +# line of the string. Make an exception when the previous string ends in a +# newline (multiple lines in one string constant) or \n\t (common in inline +# assembly to indent the instruction on the following line). + if ($line =~ /^\+\s*"/ && + $prevline =~ /"\s*$/ && + $prevline =~ /\(/ && + $prevrawline !~ /\\n(?:\\t)*"\s*$/) { + WARN("SPLIT_STRING", + "quoted string split across lines\n" . $hereprev); + } + # check for spaces before a quoted newline if ($rawline =~ /^.*\".*\s\\n/) { WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE", -- cgit v0.10.2 From e30c7a8fcf2d5bba53ea07047b1a0f9161da1078 Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:21 -0700 Subject: crc32: remove two instances of trailing whitespaces This patchset (re)uses Bob Pearson's crc32 slice-by-8 code to stamp out a software crc32c implementation. It removes the crc32c implementation in crypto/ in favor of using the stamped-out one in lib/. There is also a change to Kconfig so that the kernel builder can pick an implementation best suited for the hardware. The motivation for this patchset is that I am working on adding full metadata checksumming to ext4. As far as performance impact of adding checksumming goes, I see nearly no change with a standard mail server ffsb simulation. On a test that involves only file creation and deletion and extent tree writes, I see a drop of about 50 pcercent with the current kernel crc32c implementation; this improves to a drop of about 20 percent with the enclosed crc32c code. When metadata is usually a small fraction of total IO, this new implementation doesn't help much because metadata is usually a small fraction of total IO. However, when we are doing IO that is almost all metadata (such as rm -rf'ing a tree), then this patch speeds up the operation substantially. Incidentally, given that iscsi, sctp, and btrfs also use crc32c, this patchset should improve their speed as well. I have not yet quantified that, however. This latest submission combines Bob's patches from late August 2011 with mine so that they can be one coherent patch set. Please excuse my inability to combine some of the patches; I've been advised to leave Bob's patches alone and build atop them instead. :/ Since the last posting, I've also collected some crc32c test results on a bunch of different x86/powerpc/sparc platforms. The results can be viewed here: http://goo.gl/sgt3i ; the "crc32-kern-le" and "crc32c" columns describe the performance of the kernel's current crc32 and crc32c software implementations. The "crc32c-by8-le" column shows crc32c performance with this patchset applied. I expect crc32 performance to be roughly the same. The two _boost columns at the right side of the spreadsheet shows how much faster the new implementation is over the old one. As you can see, crc32 rises substantially, and crc32c experiences a huge increase. This patch: - remove trailing whitespace from lib/crc32.c - remove trailing whitespace from lib/crc32defs.h [djwong@us.ibm.com: changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index 4b35d2b..ffea0c9 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -317,7 +317,7 @@ EXPORT_SYMBOL(crc32_be); * in the correct multiple to subtract, we can shift a byte at a time. * This produces a 40-bit (rather than a 33-bit) intermediate remainder, * but again the multiple of the polynomial to subtract depends only on - * the high bits, the high 8 bits in this case. + * the high bits, the high 8 bits in this case. * * The multiple we need in that case is the low 32 bits of a 40-bit * value whose high 8 bits are given, and which is a multiple of the diff --git a/lib/crc32defs.h b/lib/crc32defs.h index 9b6773d..f5a5401 100644 --- a/lib/crc32defs.h +++ b/lib/crc32defs.h @@ -8,7 +8,7 @@ /* How many bits at a time to use. Requires a table of 4< Date: Fri, 23 Mar 2012 15:02:22 -0700 Subject: crc32: move long comment about crc32 fundamentals to Documentation/ Move a long comment from lib/crc32.c to Documentation/crc32.txt where it will more likely get read. Edited the resulting document to add an explanation of the slicing-by-n algorithm. [djwong@us.ibm.com: minor changelog tweaks] [akpm@linux-foundation.org: fix typo, per George] Signed-off-by: George Spelvin Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX index a1a6432..2214f12 100644 --- a/Documentation/00-INDEX +++ b/Documentation/00-INDEX @@ -104,6 +104,8 @@ cpuidle/ - info on CPU_IDLE, CPU idle state management subsystem. cputopology.txt - documentation on how CPU topology info is exported via sysfs. +crc32.txt + - brief tutorial on CRC computation cris/ - directory with info about Linux on CRIS architecture. crypto/ diff --git a/Documentation/crc32.txt b/Documentation/crc32.txt new file mode 100644 index 0000000..a08a7dd --- /dev/null +++ b/Documentation/crc32.txt @@ -0,0 +1,182 @@ +A brief CRC tutorial. + +A CRC is a long-division remainder. You add the CRC to the message, +and the whole thing (message+CRC) is a multiple of the given +CRC polynomial. To check the CRC, you can either check that the +CRC matches the recomputed value, *or* you can check that the +remainder computed on the message+CRC is 0. This latter approach +is used by a lot of hardware implementations, and is why so many +protocols put the end-of-frame flag after the CRC. + +It's actually the same long division you learned in school, except that +- We're working in binary, so the digits are only 0 and 1, and +- When dividing polynomials, there are no carries. Rather than add and + subtract, we just xor. Thus, we tend to get a bit sloppy about + the difference between adding and subtracting. + +Like all division, the remainder is always smaller than the divisor. +To produce a 32-bit CRC, the divisor is actually a 33-bit CRC polynomial. +Since it's 33 bits long, bit 32 is always going to be set, so usually the +CRC is written in hex with the most significant bit omitted. (If you're +familiar with the IEEE 754 floating-point format, it's the same idea.) + +Note that a CRC is computed over a string of *bits*, so you have +to decide on the endianness of the bits within each byte. To get +the best error-detecting properties, this should correspond to the +order they're actually sent. For example, standard RS-232 serial is +little-endian; the most significant bit (sometimes used for parity) +is sent last. And when appending a CRC word to a message, you should +do it in the right order, matching the endianness. + +Just like with ordinary division, you proceed one digit (bit) at a time. +Each step of the division you take one more digit (bit) of the dividend +and append it to the current remainder. Then you figure out the +appropriate multiple of the divisor to subtract to being the remainder +back into range. In binary, this is easy - it has to be either 0 or 1, +and to make the XOR cancel, it's just a copy of bit 32 of the remainder. + +When computing a CRC, we don't care about the quotient, so we can +throw the quotient bit away, but subtract the appropriate multiple of +the polynomial from the remainder and we're back to where we started, +ready to process the next bit. + +A big-endian CRC written this way would be coded like: +for (i = 0; i < input_bits; i++) { + multiple = remainder & 0x80000000 ? CRCPOLY : 0; + remainder = (remainder << 1 | next_input_bit()) ^ multiple; +} + +Notice how, to get at bit 32 of the shifted remainder, we look +at bit 31 of the remainder *before* shifting it. + +But also notice how the next_input_bit() bits we're shifting into +the remainder don't actually affect any decision-making until +32 bits later. Thus, the first 32 cycles of this are pretty boring. +Also, to add the CRC to a message, we need a 32-bit-long hole for it at +the end, so we have to add 32 extra cycles shifting in zeros at the +end of every message, + +These details lead to a standard trick: rearrange merging in the +next_input_bit() until the moment it's needed. Then the first 32 cycles +can be precomputed, and merging in the final 32 zero bits to make room +for the CRC can be skipped entirely. This changes the code to: + +for (i = 0; i < input_bits; i++) { + remainder ^= next_input_bit() << 31; + multiple = (remainder & 0x80000000) ? CRCPOLY : 0; + remainder = (remainder << 1) ^ multiple; +} + +With this optimization, the little-endian code is particularly simple: +for (i = 0; i < input_bits; i++) { + remainder ^= next_input_bit(); + multiple = (remainder & 1) ? CRCPOLY : 0; + remainder = (remainder >> 1) ^ multiple; +} + +The most significant coefficient of the remainder polynomial is stored +in the least significant bit of the binary "remainder" variable. +The other details of endianness have been hidden in CRCPOLY (which must +be bit-reversed) and next_input_bit(). + +As long as next_input_bit is returning the bits in a sensible order, we don't +*have* to wait until the last possible moment to merge in additional bits. +We can do it 8 bits at a time rather than 1 bit at a time: +for (i = 0; i < input_bytes; i++) { + remainder ^= next_input_byte() << 24; + for (j = 0; j < 8; j++) { + multiple = (remainder & 0x80000000) ? CRCPOLY : 0; + remainder = (remainder << 1) ^ multiple; + } +} + +Or in little-endian: +for (i = 0; i < input_bytes; i++) { + remainder ^= next_input_byte(); + for (j = 0; j < 8; j++) { + multiple = (remainder & 1) ? CRCPOLY : 0; + remainder = (remainder >> 1) ^ multiple; + } +} + +If the input is a multiple of 32 bits, you can even XOR in a 32-bit +word at a time and increase the inner loop count to 32. + +You can also mix and match the two loop styles, for example doing the +bulk of a message byte-at-a-time and adding bit-at-a-time processing +for any fractional bytes at the end. + +To reduce the number of conditional branches, software commonly uses +the byte-at-a-time table method, popularized by Dilip V. Sarwate, +"Computation of Cyclic Redundancy Checks via Table Look-Up", Comm. ACM +v.31 no.8 (August 1998) p. 1008-1013. + +Here, rather than just shifting one bit of the remainder to decide +in the correct multiple to subtract, we can shift a byte at a time. +This produces a 40-bit (rather than a 33-bit) intermediate remainder, +and the correct multiple of the polynomial to subtract is found using +a 256-entry lookup table indexed by the high 8 bits. + +(The table entries are simply the CRC-32 of the given one-byte messages.) + +When space is more constrained, smaller tables can be used, e.g. two +4-bit shifts followed by a lookup in a 16-entry table. + +It is not practical to process much more than 8 bits at a time using this +technique, because tables larger than 256 entries use too much memory and, +more importantly, too much of the L1 cache. + +To get higher software performance, a "slicing" technique can be used. +See "High Octane CRC Generation with the Intel Slicing-by-8 Algorithm", +ftp://download.intel.com/technology/comms/perfnet/download/slicing-by-8.pdf + +This does not change the number of table lookups, but does increase +the parallelism. With the classic Sarwate algorithm, each table lookup +must be completed before the index of the next can be computed. + +A "slicing by 2" technique would shift the remainder 16 bits at a time, +producing a 48-bit intermediate remainder. Rather than doing a single +lookup in a 65536-entry table, the two high bytes are looked up in +two different 256-entry tables. Each contains the remainder required +to cancel out the corresponding byte. The tables are different because the +polynomials to cancel are different. One has non-zero coefficients from +x^32 to x^39, while the other goes from x^40 to x^47. + +Since modern processors can handle many parallel memory operations, this +takes barely longer than a single table look-up and thus performs almost +twice as fast as the basic Sarwate algorithm. + +This can be extended to "slicing by 4" using 4 256-entry tables. +Each step, 32 bits of data is fetched, XORed with the CRC, and the result +broken into bytes and looked up in the tables. Because the 32-bit shift +leaves the low-order bits of the intermediate remainder zero, the +final CRC is simply the XOR of the 4 table look-ups. + +But this still enforces sequential execution: a second group of table +look-ups cannot begin until the previous groups 4 table look-ups have all +been completed. Thus, the processor's load/store unit is sometimes idle. + +To make maximum use of the processor, "slicing by 8" performs 8 look-ups +in parallel. Each step, the 32-bit CRC is shifted 64 bits and XORed +with 64 bits of input data. What is important to note is that 4 of +those 8 bytes are simply copies of the input data; they do not depend +on the previous CRC at all. Thus, those 4 table look-ups may commence +immediately, without waiting for the previous loop iteration. + +By always having 4 loads in flight, a modern superscalar processor can +be kept busy and make full use of its L1 cache. + +Two more details about CRC implementation in the real world: + +Normally, appending zero bits to a message which is already a multiple +of a polynomial produces a larger multiple of that polynomial. Thus, +a basic CRC will not detect appended zero bits (or bytes). To enable +a CRC to detect this condition, it's common to invert the CRC before +appending it. This makes the remainder of the message+crc come out not +as zero, but some fixed non-zero value. (The CRC of the inversion +pattern, 0xffffffff.) + +The same problem applies to zero bits prepended to the message, and a +similar solution is used. Instead of starting the CRC computation with +a remainder of 0, an initial remainder of all ones is used. As long as +you start the same way on decoding, it doesn't make a difference. diff --git a/lib/crc32.c b/lib/crc32.c index ffea0c9..c3ce94a 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -20,6 +20,8 @@ * Version 2. See the file COPYING for more details. */ +/* see: Documentation/crc32.txt for a description of algorithms */ + #include #include #include @@ -209,133 +211,6 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) EXPORT_SYMBOL(crc32_le); EXPORT_SYMBOL(crc32_be); -/* - * A brief CRC tutorial. - * - * A CRC is a long-division remainder. You add the CRC to the message, - * and the whole thing (message+CRC) is a multiple of the given - * CRC polynomial. To check the CRC, you can either check that the - * CRC matches the recomputed value, *or* you can check that the - * remainder computed on the message+CRC is 0. This latter approach - * is used by a lot of hardware implementations, and is why so many - * protocols put the end-of-frame flag after the CRC. - * - * It's actually the same long division you learned in school, except that - * - We're working in binary, so the digits are only 0 and 1, and - * - When dividing polynomials, there are no carries. Rather than add and - * subtract, we just xor. Thus, we tend to get a bit sloppy about - * the difference between adding and subtracting. - * - * A 32-bit CRC polynomial is actually 33 bits long. But since it's - * 33 bits long, bit 32 is always going to be set, so usually the CRC - * is written in hex with the most significant bit omitted. (If you're - * familiar with the IEEE 754 floating-point format, it's the same idea.) - * - * Note that a CRC is computed over a string of *bits*, so you have - * to decide on the endianness of the bits within each byte. To get - * the best error-detecting properties, this should correspond to the - * order they're actually sent. For example, standard RS-232 serial is - * little-endian; the most significant bit (sometimes used for parity) - * is sent last. And when appending a CRC word to a message, you should - * do it in the right order, matching the endianness. - * - * Just like with ordinary division, the remainder is always smaller than - * the divisor (the CRC polynomial) you're dividing by. Each step of the - * division, you take one more digit (bit) of the dividend and append it - * to the current remainder. Then you figure out the appropriate multiple - * of the divisor to subtract to being the remainder back into range. - * In binary, it's easy - it has to be either 0 or 1, and to make the - * XOR cancel, it's just a copy of bit 32 of the remainder. - * - * When computing a CRC, we don't care about the quotient, so we can - * throw the quotient bit away, but subtract the appropriate multiple of - * the polynomial from the remainder and we're back to where we started, - * ready to process the next bit. - * - * A big-endian CRC written this way would be coded like: - * for (i = 0; i < input_bits; i++) { - * multiple = remainder & 0x80000000 ? CRCPOLY : 0; - * remainder = (remainder << 1 | next_input_bit()) ^ multiple; - * } - * Notice how, to get at bit 32 of the shifted remainder, we look - * at bit 31 of the remainder *before* shifting it. - * - * But also notice how the next_input_bit() bits we're shifting into - * the remainder don't actually affect any decision-making until - * 32 bits later. Thus, the first 32 cycles of this are pretty boring. - * Also, to add the CRC to a message, we need a 32-bit-long hole for it at - * the end, so we have to add 32 extra cycles shifting in zeros at the - * end of every message, - * - * So the standard trick is to rearrage merging in the next_input_bit() - * until the moment it's needed. Then the first 32 cycles can be precomputed, - * and merging in the final 32 zero bits to make room for the CRC can be - * skipped entirely. - * This changes the code to: - * for (i = 0; i < input_bits; i++) { - * remainder ^= next_input_bit() << 31; - * multiple = (remainder & 0x80000000) ? CRCPOLY : 0; - * remainder = (remainder << 1) ^ multiple; - * } - * With this optimization, the little-endian code is simpler: - * for (i = 0; i < input_bits; i++) { - * remainder ^= next_input_bit(); - * multiple = (remainder & 1) ? CRCPOLY : 0; - * remainder = (remainder >> 1) ^ multiple; - * } - * - * Note that the other details of endianness have been hidden in CRCPOLY - * (which must be bit-reversed) and next_input_bit(). - * - * However, as long as next_input_bit is returning the bits in a sensible - * order, we can actually do the merging 8 or more bits at a time rather - * than one bit at a time: - * for (i = 0; i < input_bytes; i++) { - * remainder ^= next_input_byte() << 24; - * for (j = 0; j < 8; j++) { - * multiple = (remainder & 0x80000000) ? CRCPOLY : 0; - * remainder = (remainder << 1) ^ multiple; - * } - * } - * Or in little-endian: - * for (i = 0; i < input_bytes; i++) { - * remainder ^= next_input_byte(); - * for (j = 0; j < 8; j++) { - * multiple = (remainder & 1) ? CRCPOLY : 0; - * remainder = (remainder << 1) ^ multiple; - * } - * } - * If the input is a multiple of 32 bits, you can even XOR in a 32-bit - * word at a time and increase the inner loop count to 32. - * - * You can also mix and match the two loop styles, for example doing the - * bulk of a message byte-at-a-time and adding bit-at-a-time processing - * for any fractional bytes at the end. - * - * The only remaining optimization is to the byte-at-a-time table method. - * Here, rather than just shifting one bit of the remainder to decide - * in the correct multiple to subtract, we can shift a byte at a time. - * This produces a 40-bit (rather than a 33-bit) intermediate remainder, - * but again the multiple of the polynomial to subtract depends only on - * the high bits, the high 8 bits in this case. - * - * The multiple we need in that case is the low 32 bits of a 40-bit - * value whose high 8 bits are given, and which is a multiple of the - * generator polynomial. This is simply the CRC-32 of the given - * one-byte message. - * - * Two more details: normally, appending zero bits to a message which - * is already a multiple of a polynomial produces a larger multiple of that - * polynomial. To enable a CRC to detect this condition, it's common to - * invert the CRC before appending it. This makes the remainder of the - * message+crc come out not as zero, but some fixed non-zero value. - * - * The same problem applies to zero bits prepended to the message, and - * a similar solution is used. Instead of starting with a remainder of - * 0, an initial remainder of all ones is used. As long as you start - * the same way on decoding, it doesn't make a difference. - */ - #ifdef UNITTEST #include -- cgit v0.10.2 From 3863ef31dcf04f977a94402348fec06179db58e0 Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:22 -0700 Subject: crc32: simplify unit test code Replace the unit test provided in crc32.c, which doesn't have a makefile and doesn't compile with current headers, with a simpler self test routine that also gives a measure of performance and runs at module init time. The self test option can be enabled through a configuration option CONFIG_CRC32_SELFTEST. The test stresses the pre and post loops and is thus not very realistic since actual uses will likely have addresses and lengths that are at least 4 byte aligned. However, the main loop is long enough so that the performance is dominated by that loop. The expected values for crc32_le and crc32_be were generated with the original version of crc32.c using CRC_BITS_LE = 8 and CRC_BITS_BE = 8. These values were then used to check all the values of the BITS parameters in both the original and new versions. The performance results show some variability from run to run in spite of attempts to both warm the cache and reduce the amount of OS noise by limiting interrutps during the test. To get comparable results and to analyse options wrt performance the best time reported over a small sample of runs has been taken. [djwong@us.ibm.com: Minor changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/Kconfig b/lib/Kconfig index 028aba9..d5a86aa 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -70,6 +70,16 @@ config CRC32 kernel tree does. Such modules that use library CRC32 functions require M here. +config CRC32_SELFTEST + bool "CRC32 perform self test on init" + default n + depends on CRC32 + help + This option enables the CRC32 library functions to perform a + self test on initialization. The self test computes crc32_le + and crc32_be over byte strings with random alignment and length + and computes the total elapsed time and number of bytes processed. + config CRC7 tristate "CRC7 functions" help diff --git a/lib/crc32.c b/lib/crc32.c index c3ce94a..996115d 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -211,137 +211,701 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) EXPORT_SYMBOL(crc32_le); EXPORT_SYMBOL(crc32_be); -#ifdef UNITTEST +#ifdef CONFIG_CRC32_SELFTEST -#include -#include - -#if 0 /*Not used at present */ -static void -buf_dump(char const *prefix, unsigned char const *buf, size_t len) +/* 4096 random bytes */ +static u8 __attribute__((__aligned__(8))) test_buf[] = { - fputs(prefix, stdout); - while (len--) - printf(" %02x", *buf++); - putchar('\n'); - -} -#endif - -static void bytereverse(unsigned char *buf, size_t len) + 0x5b, 0x85, 0x21, 0xcb, 0x09, 0x68, 0x7d, 0x30, + 0xc7, 0x69, 0xd7, 0x30, 0x92, 0xde, 0x59, 0xe4, + 0xc9, 0x6e, 0x8b, 0xdb, 0x98, 0x6b, 0xaa, 0x60, + 0xa8, 0xb5, 0xbc, 0x6c, 0xa9, 0xb1, 0x5b, 0x2c, + 0xea, 0xb4, 0x92, 0x6a, 0x3f, 0x79, 0x91, 0xe4, + 0xe9, 0x70, 0x51, 0x8c, 0x7f, 0x95, 0x6f, 0x1a, + 0x56, 0xa1, 0x5c, 0x27, 0x03, 0x67, 0x9f, 0x3a, + 0xe2, 0x31, 0x11, 0x29, 0x6b, 0x98, 0xfc, 0xc4, + 0x53, 0x24, 0xc5, 0x8b, 0xce, 0x47, 0xb2, 0xb9, + 0x32, 0xcb, 0xc1, 0xd0, 0x03, 0x57, 0x4e, 0xd4, + 0xe9, 0x3c, 0xa1, 0x63, 0xcf, 0x12, 0x0e, 0xca, + 0xe1, 0x13, 0xd1, 0x93, 0xa6, 0x88, 0x5c, 0x61, + 0x5b, 0xbb, 0xf0, 0x19, 0x46, 0xb4, 0xcf, 0x9e, + 0xb6, 0x6b, 0x4c, 0x3a, 0xcf, 0x60, 0xf9, 0x7a, + 0x8d, 0x07, 0x63, 0xdb, 0x40, 0xe9, 0x0b, 0x6f, + 0xad, 0x97, 0xf1, 0xed, 0xd0, 0x1e, 0x26, 0xfd, + 0xbf, 0xb7, 0xc8, 0x04, 0x94, 0xf8, 0x8b, 0x8c, + 0xf1, 0xab, 0x7a, 0xd4, 0xdd, 0xf3, 0xe8, 0x88, + 0xc3, 0xed, 0x17, 0x8a, 0x9b, 0x40, 0x0d, 0x53, + 0x62, 0x12, 0x03, 0x5f, 0x1b, 0x35, 0x32, 0x1f, + 0xb4, 0x7b, 0x93, 0x78, 0x0d, 0xdb, 0xce, 0xa4, + 0xc0, 0x47, 0xd5, 0xbf, 0x68, 0xe8, 0x5d, 0x74, + 0x8f, 0x8e, 0x75, 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0xef, 0x22, 0x06, 0x83, 0x36, + 0x29, 0x12, 0x11, 0x40, 0xbc, 0x3b, 0x86, 0xaa, + 0xaa, 0x65, 0x60, 0xc3, 0x80, 0xca, 0xed, 0xa9, + 0xf3, 0xb0, 0x79, 0x96, 0xa2, 0x55, 0x27, 0x28, + 0x55, 0x73, 0x26, 0xa5, 0x50, 0xea, 0x92, 0x4b, + 0x3c, 0x5c, 0x82, 0x33, 0xf0, 0x01, 0x3f, 0x03, + 0xc1, 0x08, 0x05, 0xbf, 0x98, 0xf4, 0x9b, 0x6d, + 0xa5, 0xa8, 0xb4, 0x82, 0x0c, 0x06, 0xfa, 0xff, + 0x2d, 0x08, 0xf3, 0x05, 0x4f, 0x57, 0x2a, 0x39, + 0xd4, 0x83, 0x0d, 0x75, 0x51, 0xd8, 0x5b, 0x1b, + 0xd3, 0x51, 0x5a, 0x32, 0x2a, 0x9b, 0x32, 0xb2, + 0xf2, 0xa4, 0x96, 0x12, 0xf2, 0xae, 0x40, 0x34, + 0x67, 0xa8, 0xf5, 0x44, 0xd5, 0x35, 0x53, 0xfe, + 0xa3, 0x60, 0x96, 0x63, 0x0f, 0x1f, 0x6e, 0xb0, + 0x5a, 0x42, 0xa6, 0xfc, 0x51, 0x0b, 0x60, 0x27, + 0xbc, 0x06, 0x71, 0xed, 0x65, 0x5b, 0x23, 0x86, + 0x4a, 0x07, 0x3b, 0x22, 0x07, 0x46, 0xe6, 0x90, + 0x3e, 0xf3, 0x25, 0x50, 0x1b, 0x4c, 0x7f, 0x03, + 0x08, 0xa8, 0x36, 0x6b, 0x87, 0xe5, 0xe3, 0xdb, + 0x9a, 0x38, 0x83, 0xff, 0x9f, 0x1a, 0x9f, 0x57, + 0xa4, 0x2a, 0xf6, 0x37, 0xbc, 0x1a, 0xff, 0xc9, + 0x1e, 0x35, 0x0c, 0xc3, 0x7c, 0xa3, 0xb2, 0xe5, + 0xd2, 0xc6, 0xb4, 0x57, 0x47, 0xe4, 0x32, 0x16, + 0x6d, 0xa9, 0xae, 0x64, 0xe6, 0x2d, 0x8d, 0xc5, + 0x8d, 0x50, 0x8e, 0xe8, 0x1a, 0x22, 0x34, 0x2a, + 0xd9, 0xeb, 0x51, 0x90, 0x4a, 0xb1, 0x41, 0x7d, + 0x64, 0xf9, 0xb9, 0x0d, 0xf6, 0x23, 0x33, 0xb0, + 0x33, 0xf4, 0xf7, 0x3f, 0x27, 0x84, 0xc6, 0x0f, + 0x54, 0xa5, 0xc0, 0x2e, 0xec, 0x0b, 0x3a, 0x48, + 0x6e, 0x80, 0x35, 0x81, 0x43, 0x9b, 0x90, 0xb1, + 0xd0, 0x2b, 0xea, 0x21, 0xdc, 0xda, 0x5b, 0x09, + 0xf4, 0xcc, 0x10, 0xb4, 0xc7, 0xfe, 0x79, 0x51, + 0xc3, 0xc5, 0xac, 0x88, 0x74, 0x84, 0x0b, 0x4b, + 0xca, 0x79, 0x16, 0x29, 0xfb, 0x69, 0x54, 0xdf, + 0x41, 0x7e, 0xe9, 0xc7, 0x8e, 0xea, 0xa5, 0xfe, + 0xfc, 0x76, 0x0e, 0x90, 0xc4, 0x92, 0x38, 0xad, + 0x7b, 0x48, 0xe6, 0x6e, 0xf7, 0x21, 0xfd, 0x4e, + 0x93, 0x0a, 0x7b, 0x41, 0x83, 0x68, 0xfb, 0x57, + 0x51, 0x76, 0x34, 0xa9, 0x6c, 0x00, 0xaa, 0x4f, + 0x66, 0x65, 0x98, 0x4a, 0x4f, 0xa3, 0xa0, 0xef, + 0x69, 0x3f, 0xe3, 0x1c, 0x92, 0x8c, 0xfd, 0xd8, + 0xe8, 0xde, 0x7c, 0x7f, 0x3e, 0x84, 0x8e, 0x69, + 0x3c, 0xf1, 0xf2, 0x05, 0x46, 0xdc, 0x2f, 0x9d, + 0x5e, 0x6e, 0x4c, 0xfb, 0xb5, 0x99, 0x2a, 0x59, + 0x63, 0xc1, 0x34, 0xbc, 0x57, 0xc0, 0x0d, 0xb9, + 0x61, 0x25, 0xf3, 0x33, 0x23, 0x51, 0xb6, 0x0d, + 0x07, 0xa6, 0xab, 0x94, 0x4a, 0xb7, 0x2a, 0xea, + 0xee, 0xac, 0xa3, 0xc3, 0x04, 0x8b, 0x0e, 0x56, + 0xfe, 0x44, 0xa7, 0x39, 0xe2, 0xed, 0xed, 0xb4, + 0x22, 0x2b, 0xac, 0x12, 0x32, 0x28, 0x91, 0xd8, + 0xa5, 0xab, 0xff, 0x5f, 0xe0, 0x4b, 0xda, 0x78, + 0x17, 0xda, 0xf1, 0x01, 0x5b, 0xcd, 0xe2, 0x5f, + 0x50, 0x45, 0x73, 0x2b, 0xe4, 0x76, 0x77, 0xf4, + 0x64, 0x1d, 0x43, 0xfb, 0x84, 0x7a, 0xea, 0x91, + 0xae, 0xf9, 0x9e, 0xb7, 0xb4, 0xb0, 0x91, 0x5f, + 0x16, 0x35, 0x9a, 0x11, 0xb8, 0xc7, 0xc1, 0x8c, + 0xc6, 0x10, 0x8d, 0x2f, 0x63, 0x4a, 0xa7, 0x57, + 0x3a, 0x51, 0xd6, 0x32, 0x2d, 0x64, 0x72, 0xd4, + 0x66, 0xdc, 0x10, 0xa6, 0x67, 0xd6, 0x04, 0x23, + 0x9d, 0x0a, 0x11, 0x77, 0xdd, 0x37, 0x94, 0x17, + 0x3c, 0xbf, 0x8b, 0x65, 0xb0, 0x2e, 0x5e, 0x66, + 0x47, 0x64, 0xac, 0xdd, 0xf0, 0x84, 0xfd, 0x39, + 0xfa, 0x15, 0x5d, 0xef, 0xae, 0xca, 0xc1, 0x36, + 0xa7, 0x5c, 0xbf, 0xc7, 0x08, 0xc2, 0x66, 0x00, + 0x74, 0x74, 0x4e, 0x27, 0x3f, 0x55, 0x8a, 0xb7, + 0x38, 0x66, 0x83, 0x6d, 0xcf, 0x99, 0x9e, 0x60, + 0x8f, 0xdd, 0x2e, 0x62, 0x22, 0x0e, 0xef, 0x0c, + 0x98, 0xa7, 0x85, 0x74, 0x3b, 0x9d, 0xec, 0x9e, + 0xa9, 0x19, 0x72, 0xa5, 0x7f, 0x2c, 0x39, 0xb7, + 0x7d, 0xb7, 0xf1, 0x12, 0x65, 0x27, 0x4b, 0x5a, + 0xde, 0x17, 0xfe, 0xad, 0x44, 0xf3, 0x20, 0x4d, + 0xfd, 0xe4, 0x1f, 0xb5, 0x81, 0xb0, 0x36, 0x37, + 0x08, 0x6f, 0xc3, 0x0c, 0xe9, 0x85, 0x98, 0x82, + 0xa9, 0x62, 0x0c, 0xc4, 0x97, 0xc0, 0x50, 0xc8, + 0xa7, 0x3c, 0x50, 0x9f, 0x43, 0xb9, 0xcd, 0x5e, + 0x4d, 0xfa, 0x1c, 0x4b, 0x0b, 0xa9, 0x98, 0x85, + 0x38, 0x92, 0xac, 0x8d, 0xe4, 0xad, 0x9b, 0x98, + 0xab, 0xd9, 0x38, 0xac, 0x62, 0x52, 0xa3, 0x22, + 0x63, 0x0f, 0xbf, 0x95, 0x48, 0xdf, 0x69, 0xe7, + 0x8b, 0x33, 0xd5, 0xb2, 0xbd, 0x05, 0x49, 0x49, + 0x9d, 0x57, 0x73, 0x19, 0x33, 0xae, 0xfa, 0x33, + 0xf1, 0x19, 0xa8, 0x80, 0xce, 0x04, 0x9f, 0xbc, + 0x1d, 0x65, 0x82, 0x1b, 0xe5, 0x3a, 0x51, 0xc8, + 0x1c, 0x21, 0xe3, 0x5d, 0xf3, 0x7d, 0x9b, 0x2f, + 0x2c, 0x1d, 0x4a, 0x7f, 0x9b, 0x68, 0x35, 0xa3, + 0xb2, 0x50, 0xf7, 0x62, 0x79, 0xcd, 0xf4, 0x98, + 0x4f, 0xe5, 0x63, 0x7c, 0x3e, 0x45, 0x31, 0x8c, + 0x16, 0xa0, 0x12, 0xc8, 0x58, 0xce, 0x39, 0xa6, + 0xbc, 0x54, 0xdb, 0xc5, 0xe0, 0xd5, 0xba, 0xbc, + 0xb9, 0x04, 0xf4, 0x8d, 0xe8, 0x2f, 0x15, 0x9d, +}; + +/* 100 test cases */ +static struct crc_test { + u32 crc; /* random starting crc */ + u32 start; /* random 6 bit offset in buf */ + u32 length; /* random 11 bit length of test */ + u32 crc_le; /* expected crc32_le result */ + u32 crc_be; /* expected crc32_be result */ +} test[] = { - while (len--) { - unsigned char x = bitrev8(*buf); - *buf++ = x; - } -} - -static void random_garbage(unsigned char *buf, size_t len) + {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1}, + {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad}, + {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f}, + {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a}, + {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2}, + {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793}, + {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed}, + {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35}, + {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2}, + {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10}, + {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb}, + {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0}, + {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb}, + {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed}, + {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591}, + {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67}, + {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd}, + {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a}, + {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b}, + {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f}, + {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d}, + {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a}, + {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97}, + {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2}, + {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138}, + {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032}, + {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f}, + {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f}, + {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32}, + {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef}, + {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0}, + {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59}, + {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4}, + {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c}, + {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51}, + {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11}, + {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659}, + {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af}, + {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99}, + {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b}, + {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521}, + {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3}, + {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d}, + {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f}, + {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b}, + {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0}, + {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195}, + {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d}, + {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4}, + {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3}, + {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643}, + {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10}, + {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d}, + {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5}, + {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b}, + {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee}, + {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14}, + {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a}, + {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b}, + {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3}, + {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826}, + {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06}, + {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35}, + {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801}, + {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2}, + {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d}, + {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c}, + {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba}, + {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5}, + {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b}, + {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178}, + {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3}, + {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605}, + {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1}, + {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9}, + {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78}, + {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9}, + {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd}, + {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab}, + {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb}, + {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77}, + {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da}, + {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39}, + {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16}, + {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208}, + {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e}, + {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5}, + {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892}, + {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db}, + {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43}, + {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac}, + {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7}, + {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2}, + {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2}, + {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640}, + {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f}, + {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99}, + {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7}, + {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499}, + {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a}, +}; + +#include + +static int __init crc32_init(void) { - while (len--) - *buf++ = (unsigned char) random(); -} + int i; + int errors = 0; + int bytes = 0; + struct timespec start, stop; + u64 nsec; + unsigned long flags; -#if 0 /* Not used at present */ -static void store_le(u32 x, unsigned char *buf) -{ - buf[0] = (unsigned char) x; - buf[1] = (unsigned char) (x >> 8); - buf[2] = (unsigned char) (x >> 16); - buf[3] = (unsigned char) (x >> 24); -} -#endif + /* keep static to prevent cache warming code from + * getting eliminated by the compiler */ + static u32 crc; -static void store_be(u32 x, unsigned char *buf) -{ - buf[0] = (unsigned char) (x >> 24); - buf[1] = (unsigned char) (x >> 16); - buf[2] = (unsigned char) (x >> 8); - buf[3] = (unsigned char) x; -} + /* pre-warm the cache */ + for (i = 0; i < 100; i++) { + bytes += 2*test[i].length; -/* - * This checks that CRC(buf + CRC(buf)) = 0, and that - * CRC commutes with bit-reversal. This has the side effect - * of bytewise bit-reversing the input buffer, and returns - * the CRC of the reversed buffer. - */ -static u32 test_step(u32 init, unsigned char *buf, size_t len) -{ - u32 crc1, crc2; - size_t i; - - crc1 = crc32_be(init, buf, len); - store_be(crc1, buf + len); - crc2 = crc32_be(init, buf, len + 4); - if (crc2) - printf("\nCRC cancellation fail: 0x%08x should be 0\n", - crc2); - - for (i = 0; i <= len + 4; i++) { - crc2 = crc32_be(init, buf, i); - crc2 = crc32_be(crc2, buf + i, len + 4 - i); - if (crc2) - printf("\nCRC split fail: 0x%08x\n", crc2); + crc ^= crc32_le(test[i].crc, test_buf + + test[i].start, test[i].length); + + crc ^= crc32_be(test[i].crc, test_buf + + test[i].start, test[i].length); } - /* Now swap it around for the other test */ - - bytereverse(buf, len + 4); - init = bitrev32(init); - crc2 = bitrev32(crc1); - if (crc1 != bitrev32(crc2)) - printf("\nBit reversal fail: 0x%08x -> 0x%08x -> 0x%08x\n", - crc1, crc2, bitrev32(crc2)); - crc1 = crc32_le(init, buf, len); - if (crc1 != crc2) - printf("\nCRC endianness fail: 0x%08x != 0x%08x\n", crc1, - crc2); - crc2 = crc32_le(init, buf, len + 4); - if (crc2) - printf("\nCRC cancellation fail: 0x%08x should be 0\n", - crc2); - - for (i = 0; i <= len + 4; i++) { - crc2 = crc32_le(init, buf, i); - crc2 = crc32_le(crc2, buf + i, len + 4 - i); - if (crc2) - printf("\nCRC split fail: 0x%08x\n", crc2); + /* reduce OS noise */ + local_irq_save(flags); + local_irq_disable(); + + getnstimeofday(&start); + for (i = 0; i < 100; i++) { + if (test[i].crc_le != crc32_le(test[i].crc, test_buf + + test[i].start, test[i].length)) + errors++; + + if (test[i].crc_be != crc32_be(test[i].crc, test_buf + + test[i].start, test[i].length)) + errors++; } + getnstimeofday(&stop); - return crc1; -} + local_irq_restore(flags); + local_irq_enable(); -#define SIZE 64 -#define INIT1 0 -#define INIT2 0 + nsec = stop.tv_nsec - start.tv_nsec + + 1000000000 * (stop.tv_sec - start.tv_sec); -int main(void) -{ - unsigned char buf1[SIZE + 4]; - unsigned char buf2[SIZE + 4]; - unsigned char buf3[SIZE + 4]; - int i, j; - u32 crc1, crc2, crc3; - - for (i = 0; i <= SIZE; i++) { - printf("\rTesting length %d...", i); - fflush(stdout); - random_garbage(buf1, i); - random_garbage(buf2, i); - for (j = 0; j < i; j++) - buf3[j] = buf1[j] ^ buf2[j]; - - crc1 = test_step(INIT1, buf1, i); - crc2 = test_step(INIT2, buf2, i); - /* Now check that CRC(buf1 ^ buf2) = CRC(buf1) ^ CRC(buf2) */ - crc3 = test_step(INIT1 ^ INIT2, buf3, i); - if (crc3 != (crc1 ^ crc2)) - printf("CRC XOR fail: 0x%08x != 0x%08x ^ 0x%08x\n", - crc3, crc1, crc2); + pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n", + CRC_LE_BITS, CRC_BE_BITS); + + if (errors) + pr_warn("crc32: %d self tests failed\n", errors); + else { + pr_info("crc32: self tests passed, processed %d bytes in %lld nsec\n", + bytes, nsec); } - printf("\nAll test complete. No failures expected.\n"); + return 0; } -#endif /* UNITTEST */ +static void __exit crc32_exit(void) +{ +} + +module_init(crc32_init); +module_exit(crc32_exit); +#endif /* CONFIG_CRC32_SELFTEST */ -- cgit v0.10.2 From 60e58d5c9d8d698600e8ccb44b5a13cf99d0d90f Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:22 -0700 Subject: crc32: miscellaneous cleanups Misc cleanup of lib/crc32.c and related files. - remove unnecessary header files. - straighten out some convoluted ifdef's - rewrite some references to 2 dimensional arrays as 1 dimensional arrays to make them correct. I.e. replace tab[i] with tab[0][i]. - a few trivial whitespace changes - fix a warning in gen_crc32tables.c caused by a mismatch in the type of the pointer passed to output table. Since the table is only used at kernel compile time, it is simpler to make the table big enough to hold the largest column size used. One cannot make the column size smaller in output_table because it has to be used by both the le and be tables and they can have different column sizes. [djwong@us.ibm.com: Minor changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index 996115d..bf03922 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -23,13 +23,10 @@ /* see: Documentation/crc32.txt for a description of algorithms */ #include -#include #include -#include #include -#include -#include #include "crc32defs.h" + #if CRC_LE_BITS == 8 # define tole(x) __constant_cpu_to_le32(x) #else @@ -41,6 +38,7 @@ #else # define tobe(x) (x) #endif + #include "crc32table.h" MODULE_AUTHOR("Matt Domsch "); @@ -96,6 +94,7 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) #undef DO_CRC4 } #endif + /** * crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32 * @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for @@ -103,53 +102,39 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) * @p: pointer to buffer over which CRC is run * @len: length of buffer @p */ -u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len); - -#if CRC_LE_BITS == 1 -/* - * In fact, the table-based code will work in this case, but it can be - * simplified by inlining the table in ?: form. - */ - u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) { +#if CRC_LE_BITS == 1 int i; while (len--) { crc ^= *p++; for (i = 0; i < 8; i++) crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); } - return crc; -} -#else /* Table-based approach */ - -u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) -{ -# if CRC_LE_BITS == 8 - const u32 (*tab)[] = crc32table_le; - - crc = __cpu_to_le32(crc); - crc = crc32_body(crc, p, len, tab); - return __le32_to_cpu(crc); -# elif CRC_LE_BITS == 4 +# elif CRC_LE_BITS == 2 while (len--) { crc ^= *p++; - crc = (crc >> 4) ^ crc32table_le[crc & 15]; - crc = (crc >> 4) ^ crc32table_le[crc & 15]; + crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; + crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; + crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; + crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; } - return crc; -# elif CRC_LE_BITS == 2 +# elif CRC_LE_BITS == 4 while (len--) { crc ^= *p++; - crc = (crc >> 2) ^ crc32table_le[crc & 3]; - crc = (crc >> 2) ^ crc32table_le[crc & 3]; - crc = (crc >> 2) ^ crc32table_le[crc & 3]; - crc = (crc >> 2) ^ crc32table_le[crc & 3]; + crc = (crc >> 4) ^ crc32table_le[0][crc & 15]; + crc = (crc >> 4) ^ crc32table_le[0][crc & 15]; } +# elif CRC_LE_BITS == 8 + const u32 (*tab)[] = crc32table_le; + + crc = __cpu_to_le32(crc); + crc = crc32_body(crc, p, len, tab); + crc = __le32_to_cpu(crc); +#endif return crc; -# endif } -#endif +EXPORT_SYMBOL(crc32_le); /** * crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32 @@ -158,16 +143,9 @@ u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) * @p: pointer to buffer over which CRC is run * @len: length of buffer @p */ -u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len); - -#if CRC_BE_BITS == 1 -/* - * In fact, the table-based code will work in this case, but it can be - * simplified by inlining the table in ?: form. - */ - u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) { +#if CRC_BE_BITS == 1 int i; while (len--) { crc ^= *p++ << 24; @@ -176,39 +154,29 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : 0); } - return crc; -} - -#else /* Table-based approach */ -u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) -{ -# if CRC_BE_BITS == 8 - const u32 (*tab)[] = crc32table_be; - - crc = __cpu_to_be32(crc); - crc = crc32_body(crc, p, len, tab); - return __be32_to_cpu(crc); -# elif CRC_BE_BITS == 4 +# elif CRC_BE_BITS == 2 while (len--) { crc ^= *p++ << 24; - crc = (crc << 4) ^ crc32table_be[crc >> 28]; - crc = (crc << 4) ^ crc32table_be[crc >> 28]; + crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; + crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; + crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; + crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; } - return crc; -# elif CRC_BE_BITS == 2 +# elif CRC_BE_BITS == 4 while (len--) { crc ^= *p++ << 24; - crc = (crc << 2) ^ crc32table_be[crc >> 30]; - crc = (crc << 2) ^ crc32table_be[crc >> 30]; - crc = (crc << 2) ^ crc32table_be[crc >> 30]; - crc = (crc << 2) ^ crc32table_be[crc >> 30]; + crc = (crc << 4) ^ crc32table_be[0][crc >> 28]; + crc = (crc << 4) ^ crc32table_be[0][crc >> 28]; } - return crc; +# elif CRC_BE_BITS == 8 + const u32 (*tab)[] = crc32table_be; + + crc = __cpu_to_be32(crc); + crc = crc32_body(crc, p, len, tab); + crc = __be32_to_cpu(crc); # endif + return crc; } -#endif - -EXPORT_SYMBOL(crc32_le); EXPORT_SYMBOL(crc32_be); #ifdef CONFIG_CRC32_SELFTEST diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c index 85d0e41..eced769 100644 --- a/lib/gen_crc32table.c +++ b/lib/gen_crc32table.c @@ -7,8 +7,8 @@ #define LE_TABLE_SIZE (1 << CRC_LE_BITS) #define BE_TABLE_SIZE (1 << CRC_BE_BITS) -static uint32_t crc32table_le[4][LE_TABLE_SIZE]; -static uint32_t crc32table_be[4][BE_TABLE_SIZE]; +static uint32_t crc32table_le[4][256]; +static uint32_t crc32table_be[4][256]; /** * crc32init_le() - allocate and initialize LE table data @@ -62,7 +62,7 @@ static void crc32init_be(void) } } -static void output_table(uint32_t table[4][256], int len, char *trans) +static void output_table(uint32_t (*table)[256], int len, char *trans) { int i, j; -- cgit v0.10.2 From ce4320ddda4c2520fe77194d3c801ad4e8a8aa11 Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:23 -0700 Subject: crc32: fix mixing of endian-specific types crc32.c in its original version freely mixed u32, __le32 and __be32 types which caused warnings from sparse with __CHECK_ENDIAN__. This patch fixes these by forcing the types to u32. [djwong@us.ibm.com: Minor changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index bf03922..7394288 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -28,13 +28,13 @@ #include "crc32defs.h" #if CRC_LE_BITS == 8 -# define tole(x) __constant_cpu_to_le32(x) +# define tole(x) ((__force u32) __constant_cpu_to_le32(x)) #else # define tole(x) (x) #endif #if CRC_BE_BITS == 8 -# define tobe(x) __constant_cpu_to_be32(x) +# define tobe(x) ((__force u32) __constant_cpu_to_be32(x)) #else # define tobe(x) (x) #endif @@ -128,9 +128,9 @@ u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) # elif CRC_LE_BITS == 8 const u32 (*tab)[] = crc32table_le; - crc = __cpu_to_le32(crc); + crc = (__force u32) __cpu_to_le32(crc); crc = crc32_body(crc, p, len, tab); - crc = __le32_to_cpu(crc); + crc = __le32_to_cpu((__force __le32)crc); #endif return crc; } @@ -171,9 +171,9 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) # elif CRC_BE_BITS == 8 const u32 (*tab)[] = crc32table_be; - crc = __cpu_to_be32(crc); + crc = (__force u32) __cpu_to_be32(crc); crc = crc32_body(crc, p, len, tab); - crc = __be32_to_cpu(crc); + crc = __be32_to_cpu((__force __be32)crc); # endif return crc; } -- cgit v0.10.2 From 9a1dbf6a29694c9d81b498019f103aee0f8b5b6c Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:23 -0700 Subject: crc32: make CRC_*_BITS definition correspond to actual bit counts crc32.c provides a choice of one of several algorithms for computing the LSB and LSB versions of the CRC32 checksum based on the parameters CRC_LE_BITS and CRC_BE_BITS. In the original version the values 1, 2, 4 and 8 respectively selected versions of the alrogithm that computed the crc 1, 2, 4 and 32 bits as a time. This patch series adds a new version that computes the CRC 64 bits at a time. To make things easier to understand the parameter has been reinterpreted to actually stand for the number of bits processed in each step of the algorithm so that the old value 8 has been replaced with the value 32. This also allows us to add in a widely used crc algorithm that computes the crc 8 bits at a time called the Sarwate algorithm. [djwong@us.ibm.com: Minor changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index 7394288..5971f2a 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -27,13 +27,13 @@ #include #include "crc32defs.h" -#if CRC_LE_BITS == 8 +#if CRC_LE_BITS > 8 # define tole(x) ((__force u32) __constant_cpu_to_le32(x)) #else # define tole(x) (x) #endif -#if CRC_BE_BITS == 8 +#if CRC_BE_BITS > 8 # define tobe(x) ((__force u32) __constant_cpu_to_be32(x)) #else # define tobe(x) (x) @@ -45,7 +45,7 @@ MODULE_AUTHOR("Matt Domsch "); MODULE_DESCRIPTION("Ethernet CRC32 calculations"); MODULE_LICENSE("GPL"); -#if CRC_LE_BITS == 8 || CRC_BE_BITS == 8 +#if CRC_LE_BITS > 8 || CRC_BE_BITS > 8 static inline u32 crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) @@ -126,6 +126,12 @@ u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) crc = (crc >> 4) ^ crc32table_le[0][crc & 15]; } # elif CRC_LE_BITS == 8 + /* aka Sarwate algorithm */ + while (len--) { + crc ^= *p++; + crc = (crc >> 8) ^ crc32table_le[0][crc & 255]; + } +# else const u32 (*tab)[] = crc32table_le; crc = (__force u32) __cpu_to_le32(crc); @@ -169,6 +175,11 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) crc = (crc << 4) ^ crc32table_be[0][crc >> 28]; } # elif CRC_BE_BITS == 8 + while (len--) { + crc ^= *p++ << 24; + crc = (crc << 8) ^ crc32table_be[0][crc >> 24]; + } +# else const u32 (*tab)[] = crc32table_be; crc = (__force u32) __cpu_to_be32(crc); diff --git a/lib/crc32defs.h b/lib/crc32defs.h index f5a5401..daa3a5e 100644 --- a/lib/crc32defs.h +++ b/lib/crc32defs.h @@ -6,27 +6,29 @@ #define CRCPOLY_LE 0xedb88320 #define CRCPOLY_BE 0x04c11db7 -/* How many bits at a time to use. Requires a table of 4< 8 || CRC_LE_BITS < 1 || CRC_LE_BITS & CRC_LE_BITS-1 -# error CRC_LE_BITS must be a power of 2 between 1 and 8 +#if CRC_LE_BITS > 32 || CRC_LE_BITS < 1 || CRC_LE_BITS == 16 || \ + CRC_LE_BITS & CRC_LE_BITS-1 +# error "CRC_LE_BITS must be one of {1, 2, 4, 8, 32}" #endif /* * Big-endian CRC computation. Used with serial bit streams sent * msbit-first. Be sure to use cpu_to_be32() to append the computed CRC. */ -#if CRC_BE_BITS > 8 || CRC_BE_BITS < 1 || CRC_BE_BITS & CRC_BE_BITS-1 -# error CRC_BE_BITS must be a power of 2 between 1 and 8 +#if CRC_BE_BITS > 32 || CRC_BE_BITS < 1 || CRC_BE_BITS == 16 || \ + CRC_BE_BITS & CRC_BE_BITS-1 +# error "CRC_BE_BITS must be one of {1, 2, 4, 8, 32}" #endif diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c index eced769..99ac744 100644 --- a/lib/gen_crc32table.c +++ b/lib/gen_crc32table.c @@ -4,8 +4,17 @@ #define ENTRIES_PER_LINE 4 +#if CRC_LE_BITS <= 8 #define LE_TABLE_SIZE (1 << CRC_LE_BITS) +#else +#define LE_TABLE_SIZE 256 +#endif + +#if CRC_BE_BITS <= 8 #define BE_TABLE_SIZE (1 << CRC_BE_BITS) +#else +#define BE_TABLE_SIZE 256 +#endif static uint32_t crc32table_le[4][256]; static uint32_t crc32table_be[4][256]; @@ -24,7 +33,7 @@ static void crc32init_le(void) crc32table_le[0][0] = 0; - for (i = 1 << (CRC_LE_BITS - 1); i; i >>= 1) { + for (i = LE_TABLE_SIZE >> 1; i; i >>= 1) { crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); for (j = 0; j < LE_TABLE_SIZE; j += 2 * i) crc32table_le[0][i + j] = crc ^ crc32table_le[0][j]; -- cgit v0.10.2 From 324eb0f17d9dcead3c60c133aa244f6b3631fec9 Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:24 -0700 Subject: crc32: add slice-by-8 algorithm to existing code Add slicing-by-8 algorithm to the existing slicing-by-4 algorithm. This consists of: - extend largest BITS size from 32 to 64 - extend tables from tab[4][256] to up to tab[8][256] - Add code for inner loop. [djwong@us.ibm.com: Minor changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index 5971f2a..826e163 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -47,25 +47,28 @@ MODULE_LICENSE("GPL"); #if CRC_LE_BITS > 8 || CRC_BE_BITS > 8 +/* implements slicing-by-4 or slicing-by-8 algorithm */ static inline u32 crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) { # ifdef __LITTLE_ENDIAN # define DO_CRC(x) crc = t0[(crc ^ (x)) & 255] ^ (crc >> 8) -# define DO_CRC4 crc = t3[(crc) & 255] ^ \ - t2[(crc >> 8) & 255] ^ \ - t1[(crc >> 16) & 255] ^ \ - t0[(crc >> 24) & 255] +# define DO_CRC4 (t3[(q) & 255] ^ t2[(q >> 8) & 255] ^ \ + t1[(q >> 16) & 255] ^ t0[(q >> 24) & 255]) +# define DO_CRC8 (t7[(q) & 255] ^ t6[(q >> 8) & 255] ^ \ + t5[(q >> 16) & 255] ^ t4[(q >> 24) & 255]) # else # define DO_CRC(x) crc = t0[((crc >> 24) ^ (x)) & 255] ^ (crc << 8) -# define DO_CRC4 crc = t0[(crc) & 255] ^ \ - t1[(crc >> 8) & 255] ^ \ - t2[(crc >> 16) & 255] ^ \ - t3[(crc >> 24) & 255] +# define DO_CRC4 (t0[(q) & 255] ^ t1[(q >> 8) & 255] ^ \ + t2[(q >> 16) & 255] ^ t3[(q >> 24) & 255]) +# define DO_CRC8 (t4[(q) & 255] ^ t5[(q >> 8) & 255] ^ \ + t6[(q >> 16) & 255] ^ t7[(q >> 24) & 255]) # endif const u32 *b; size_t rem_len; const u32 *t0=tab[0], *t1=tab[1], *t2=tab[2], *t3=tab[3]; + const u32 *t4 = tab[4], *t5 = tab[5], *t6 = tab[6], *t7 = tab[7]; + u32 q; /* Align it */ if (unlikely((long)buf & 3 && len)) { @@ -73,13 +76,25 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) DO_CRC(*buf++); } while ((--len) && ((long)buf)&3); } + +# if CRC_LE_BITS == 32 rem_len = len & 3; - /* load data 32 bits wide, xor data 32 bits wide. */ len = len >> 2; +# else + rem_len = len & 7; + len = len >> 3; +# endif + b = (const u32 *)buf; for (--b; len; --len) { - crc ^= *++b; /* use pre increment for speed */ - DO_CRC4; + q = crc ^ *++b; /* use pre increment for speed */ +# if CRC_LE_BITS == 32 + crc = DO_CRC4; +# else + crc = DO_CRC8; + q = *++b; + crc ^= DO_CRC4; +# endif } len = rem_len; /* And the last few bytes */ @@ -92,6 +107,7 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) return crc; #undef DO_CRC #undef DO_CRC4 +#undef DO_CRC8 } #endif diff --git a/lib/crc32defs.h b/lib/crc32defs.h index daa3a5e..8181592 100644 --- a/lib/crc32defs.h +++ b/lib/crc32defs.h @@ -6,29 +6,42 @@ #define CRCPOLY_LE 0xedb88320 #define CRCPOLY_BE 0x04c11db7 -/* How many bits at a time to use. Valid values are 1, 2, 4, 8, and 32. */ -/* For less performance-sensitive, use 4 or 8 */ +/* + * How many bits at a time to use. Valid values are 1, 2, 4, 8, 32 and 64. + * For less performance-sensitive, use 4 or 8 to save table size. + * For larger systems choose same as CPU architecture as default. + * This works well on X86_64, SPARC64 systems. This may require some + * elaboration after experiments with other architectures. + */ #ifndef CRC_LE_BITS -# define CRC_LE_BITS 32 +# ifdef CONFIG_64BIT +# define CRC_LE_BITS 64 +# else +# define CRC_LE_BITS 32 +# endif #endif #ifndef CRC_BE_BITS -# define CRC_BE_BITS 32 +# ifdef CONFIG_64BIT +# define CRC_BE_BITS 64 +# else +# define CRC_BE_BITS 32 +# endif #endif /* * Little-endian CRC computation. Used with serial bit streams sent * lsbit-first. Be sure to use cpu_to_le32() to append the computed CRC. */ -#if CRC_LE_BITS > 32 || CRC_LE_BITS < 1 || CRC_LE_BITS == 16 || \ +#if CRC_LE_BITS > 64 || CRC_LE_BITS < 1 || CRC_LE_BITS == 16 || \ CRC_LE_BITS & CRC_LE_BITS-1 -# error "CRC_LE_BITS must be one of {1, 2, 4, 8, 32}" +# error "CRC_LE_BITS must be one of {1, 2, 4, 8, 32, 64}" #endif /* * Big-endian CRC computation. Used with serial bit streams sent * msbit-first. Be sure to use cpu_to_be32() to append the computed CRC. */ -#if CRC_BE_BITS > 32 || CRC_BE_BITS < 1 || CRC_BE_BITS == 16 || \ +#if CRC_BE_BITS > 64 || CRC_BE_BITS < 1 || CRC_BE_BITS == 16 || \ CRC_BE_BITS & CRC_BE_BITS-1 -# error "CRC_BE_BITS must be one of {1, 2, 4, 8, 32}" +# error "CRC_BE_BITS must be one of {1, 2, 4, 8, 32, 64}" #endif diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c index 99ac744..0d9edd1 100644 --- a/lib/gen_crc32table.c +++ b/lib/gen_crc32table.c @@ -1,23 +1,28 @@ #include +#include "../include/generated/autoconf.h" #include "crc32defs.h" #include #define ENTRIES_PER_LINE 4 -#if CRC_LE_BITS <= 8 -#define LE_TABLE_SIZE (1 << CRC_LE_BITS) +#if CRC_LE_BITS > 8 +# define LE_TABLE_ROWS (CRC_LE_BITS/8) +# define LE_TABLE_SIZE 256 #else -#define LE_TABLE_SIZE 256 +# define LE_TABLE_ROWS 1 +# define LE_TABLE_SIZE (1 << CRC_LE_BITS) #endif -#if CRC_BE_BITS <= 8 -#define BE_TABLE_SIZE (1 << CRC_BE_BITS) +#if CRC_BE_BITS > 8 +# define BE_TABLE_ROWS (CRC_BE_BITS/8) +# define BE_TABLE_SIZE 256 #else -#define BE_TABLE_SIZE 256 +# define BE_TABLE_ROWS 1 +# define BE_TABLE_SIZE (1 << CRC_BE_BITS) #endif -static uint32_t crc32table_le[4][256]; -static uint32_t crc32table_be[4][256]; +static uint32_t crc32table_le[LE_TABLE_ROWS][256]; +static uint32_t crc32table_be[BE_TABLE_ROWS][256]; /** * crc32init_le() - allocate and initialize LE table data @@ -40,7 +45,7 @@ static void crc32init_le(void) } for (i = 0; i < LE_TABLE_SIZE; i++) { crc = crc32table_le[0][i]; - for (j = 1; j < 4; j++) { + for (j = 1; j < LE_TABLE_ROWS; j++) { crc = crc32table_le[0][crc & 0xff] ^ (crc >> 8); crc32table_le[j][i] = crc; } @@ -64,18 +69,18 @@ static void crc32init_be(void) } for (i = 0; i < BE_TABLE_SIZE; i++) { crc = crc32table_be[0][i]; - for (j = 1; j < 4; j++) { + for (j = 1; j < BE_TABLE_ROWS; j++) { crc = crc32table_be[0][(crc >> 24) & 0xff] ^ (crc << 8); crc32table_be[j][i] = crc; } } } -static void output_table(uint32_t (*table)[256], int len, char *trans) +static void output_table(uint32_t (*table)[256], int rows, int len, char *trans) { int i, j; - for (j = 0 ; j < 4; j++) { + for (j = 0 ; j < rows; j++) { printf("{"); for (i = 0; i < len - 1; i++) { if (i % ENTRIES_PER_LINE == 0) @@ -92,15 +97,21 @@ int main(int argc, char** argv) if (CRC_LE_BITS > 1) { crc32init_le(); - printf("static const u32 crc32table_le[4][256] = {"); - output_table(crc32table_le, LE_TABLE_SIZE, "tole"); + printf("static const u32 __cacheline_aligned " + "crc32table_le[%d][%d] = {", + LE_TABLE_ROWS, LE_TABLE_SIZE); + output_table(crc32table_le, LE_TABLE_ROWS, + LE_TABLE_SIZE, "tole"); printf("};\n"); } if (CRC_BE_BITS > 1) { crc32init_be(); - printf("static const u32 crc32table_be[4][256] = {"); - output_table(crc32table_be, BE_TABLE_SIZE, "tobe"); + printf("static const u32 __cacheline_aligned " + "crc32table_be[%d][%d] = {", + BE_TABLE_ROWS, BE_TABLE_SIZE); + output_table(crc32table_be, LE_TABLE_ROWS, + BE_TABLE_SIZE, "tobe"); printf("};\n"); } -- cgit v0.10.2 From 0292c497b6b942557d085b37f888ef5865f67d37 Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:24 -0700 Subject: crc32: optimize loop counter for x86 Add two changes that improve the performance of x86 systems 1. replace main loop with incrementing counter this change improves the performance of the selftest by about 5-6% on Nehalem CPUs. The apparent reason is that the compiler can use the loop index to perform an indexed memory access. This is reported to make the performance of PowerPC CPUs to get worse. 2. replace the rem_len loop with incrementing counter this change improves the performance of the selftest, which has more than the usual number of occurances, by about 1-2% on x86 CPUs. In actual work loads the length is most often a multiple of 4 bytes and this code does not get executed as often if at all. Again this change is reported to make the performance of PowerPC get worse. [djwong@us.ibm.com: Minor changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index 826e163..4eac9c7 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -66,6 +66,9 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) # endif const u32 *b; size_t rem_len; +# ifdef CONFIG_X86 + size_t i; +# endif const u32 *t0=tab[0], *t1=tab[1], *t2=tab[2], *t3=tab[3]; const u32 *t4 = tab[4], *t5 = tab[5], *t6 = tab[6], *t7 = tab[7]; u32 q; @@ -86,7 +89,12 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) # endif b = (const u32 *)buf; +# ifdef CONFIG_X86 + --b; + for (i = 0; i < len; i++) { +# else for (--b; len; --len) { +# endif q = crc ^ *++b; /* use pre increment for speed */ # if CRC_LE_BITS == 32 crc = DO_CRC4; @@ -100,9 +108,14 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) /* And the last few bytes */ if (len) { u8 *p = (u8 *)(b + 1) - 1; +# ifdef CONFIG_X86 + for (i = 0; i < len; i++) + DO_CRC(*++p); /* use pre increment for speed */ +# else do { DO_CRC(*++p); /* use pre increment for speed */ } while (--len); +# endif } return crc; #undef DO_CRC -- cgit v0.10.2 From 78dff4189708d07cdcaf7bfd1b04ebe78ac9c041 Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Fri, 23 Mar 2012 15:02:24 -0700 Subject: crc32: add note about this patchset to crc32.c Add a comment at the top of crc32.c [djwong@us.ibm.com: Minor changelog tweaks] Signed-off-by: Bob Pearson Signed-off-by: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index 4eac9c7..a1a5145 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -1,4 +1,8 @@ /* + * Aug 8, 2011 Bob Pearson with help from Joakim Tjernlund and George Spelvin + * cleaned up code to current version of sparse and added the slicing-by-8 + * algorithm to the closely similar existing slicing-by-4 algorithm. + * * Oct 15, 2000 Matt Domsch * Nicer crc32 functions/docs submitted by linux@horizon.com. Thanks! * Code was from the public domain, copyright abandoned. Code was -- cgit v0.10.2 From 46c5801eaf86e83cb3a4142ad35188db5011fff0 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 23 Mar 2012 15:02:25 -0700 Subject: crc32: bolt on crc32c Reuse the existing crc32 code to stamp out a crc32c implementation. Signed-off-by: Darrick J. Wong Cc: Herbert Xu Cc: Bob Pearson Cc: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/crc32.h b/include/linux/crc32.h index 391a259..68267b6 100644 --- a/include/linux/crc32.h +++ b/include/linux/crc32.h @@ -11,6 +11,8 @@ extern u32 crc32_le(u32 crc, unsigned char const *p, size_t len); extern u32 crc32_be(u32 crc, unsigned char const *p, size_t len); +extern u32 __crc32c_le(u32 crc, unsigned char const *p, size_t len); + #define crc32(seed, data, length) crc32_le(seed, (unsigned char const *)(data), length) /* diff --git a/lib/Kconfig b/lib/Kconfig index d5a86aa..6d7ce4b 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -61,14 +61,14 @@ config CRC_ITU_T functions require M here. config CRC32 - tristate "CRC32 functions" + tristate "CRC32/CRC32c functions" default y select BITREVERSE help This option is provided for the case where no in-kernel-tree - modules require CRC32 functions, but a module built outside the - kernel tree does. Such modules that use library CRC32 functions - require M here. + modules require CRC32/CRC32c functions, but a module built outside + the kernel tree does. Such modules that use library CRC32/CRC32c + functions require M here. config CRC32_SELFTEST bool "CRC32 perform self test on init" diff --git a/lib/crc32.c b/lib/crc32.c index a1a5145..87678dd 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -46,7 +46,7 @@ #include "crc32table.h" MODULE_AUTHOR("Matt Domsch "); -MODULE_DESCRIPTION("Ethernet CRC32 calculations"); +MODULE_DESCRIPTION("Various CRC32 calculations"); MODULE_LICENSE("GPL"); #if CRC_LE_BITS > 8 || CRC_BE_BITS > 8 @@ -135,45 +135,66 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) * @p: pointer to buffer over which CRC is run * @len: length of buffer @p */ -u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) +static inline u32 __pure crc32_le_generic(u32 crc, unsigned char const *p, + size_t len, const u32 (*tab)[256], + u32 polynomial) { #if CRC_LE_BITS == 1 int i; while (len--) { crc ^= *p++; for (i = 0; i < 8; i++) - crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); + crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0); } # elif CRC_LE_BITS == 2 while (len--) { crc ^= *p++; - crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; - crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; - crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; - crc = (crc >> 2) ^ crc32table_le[0][crc & 3]; + crc = (crc >> 2) ^ tab[0][crc & 3]; + crc = (crc >> 2) ^ tab[0][crc & 3]; + crc = (crc >> 2) ^ tab[0][crc & 3]; + crc = (crc >> 2) ^ tab[0][crc & 3]; } # elif CRC_LE_BITS == 4 while (len--) { crc ^= *p++; - crc = (crc >> 4) ^ crc32table_le[0][crc & 15]; - crc = (crc >> 4) ^ crc32table_le[0][crc & 15]; + crc = (crc >> 4) ^ tab[0][crc & 15]; + crc = (crc >> 4) ^ tab[0][crc & 15]; } # elif CRC_LE_BITS == 8 /* aka Sarwate algorithm */ while (len--) { crc ^= *p++; - crc = (crc >> 8) ^ crc32table_le[0][crc & 255]; + crc = (crc >> 8) ^ tab[0][crc & 255]; } # else - const u32 (*tab)[] = crc32table_le; - crc = (__force u32) __cpu_to_le32(crc); crc = crc32_body(crc, p, len, tab); crc = __le32_to_cpu((__force __le32)crc); #endif return crc; } + +#if CRC_LE_BITS == 1 +u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) +{ + return crc32_le_generic(crc, p, len, NULL, CRCPOLY_LE); +} +u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len) +{ + return crc32_le_generic(crc, p, len, NULL, CRC32C_POLY_LE); +} +#else +u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) +{ + return crc32_le_generic(crc, p, len, crc32table_le, CRCPOLY_LE); +} +u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len) +{ + return crc32_le_generic(crc, p, len, crc32ctable_le, CRC32C_POLY_LE); +} +#endif EXPORT_SYMBOL(crc32_le); +EXPORT_SYMBOL(__crc32c_le); /** * crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32 @@ -182,7 +203,9 @@ EXPORT_SYMBOL(crc32_le); * @p: pointer to buffer over which CRC is run * @len: length of buffer @p */ -u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) +static inline u32 __pure crc32_be_generic(u32 crc, unsigned char const *p, + size_t len, const u32 (*tab)[256], + u32 polynomial) { #if CRC_BE_BITS == 1 int i; @@ -190,37 +213,47 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) crc ^= *p++ << 24; for (i = 0; i < 8; i++) crc = - (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : + (crc << 1) ^ ((crc & 0x80000000) ? polynomial : 0); } # elif CRC_BE_BITS == 2 while (len--) { crc ^= *p++ << 24; - crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; - crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; - crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; - crc = (crc << 2) ^ crc32table_be[0][crc >> 30]; + crc = (crc << 2) ^ tab[0][crc >> 30]; + crc = (crc << 2) ^ tab[0][crc >> 30]; + crc = (crc << 2) ^ tab[0][crc >> 30]; + crc = (crc << 2) ^ tab[0][crc >> 30]; } # elif CRC_BE_BITS == 4 while (len--) { crc ^= *p++ << 24; - crc = (crc << 4) ^ crc32table_be[0][crc >> 28]; - crc = (crc << 4) ^ crc32table_be[0][crc >> 28]; + crc = (crc << 4) ^ tab[0][crc >> 28]; + crc = (crc << 4) ^ tab[0][crc >> 28]; } # elif CRC_BE_BITS == 8 while (len--) { crc ^= *p++ << 24; - crc = (crc << 8) ^ crc32table_be[0][crc >> 24]; + crc = (crc << 8) ^ tab[0][crc >> 24]; } # else - const u32 (*tab)[] = crc32table_be; - crc = (__force u32) __cpu_to_be32(crc); crc = crc32_body(crc, p, len, tab); crc = __be32_to_cpu((__force __be32)crc); # endif return crc; } + +#if CRC_LE_BITS == 1 +u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) +{ + return crc32_be_generic(crc, p, len, NULL, CRCPOLY_BE); +} +#else +u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) +{ + return crc32_be_generic(crc, p, len, crc32table_be, CRCPOLY_BE); +} +#endif EXPORT_SYMBOL(crc32_be); #ifdef CONFIG_CRC32_SELFTEST diff --git a/lib/crc32defs.h b/lib/crc32defs.h index 8181592..6fd1917 100644 --- a/lib/crc32defs.h +++ b/lib/crc32defs.h @@ -7,6 +7,13 @@ #define CRCPOLY_BE 0x04c11db7 /* + * This is the CRC32c polynomial, as outlined by Castagnoli. + * x^32+x^28+x^27+x^26+x^25+x^23+x^22+x^20+x^19+x^18+x^14+x^13+x^11+x^10+x^9+ + * x^8+x^6+x^0 + */ +#define CRC32C_POLY_LE 0x82F63B78 + +/* * How many bits at a time to use. Valid values are 1, 2, 4, 8, 32 and 64. * For less performance-sensitive, use 4 or 8 to save table size. * For larger systems choose same as CPU architecture as default. diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c index 0d9edd1..8f8d543 100644 --- a/lib/gen_crc32table.c +++ b/lib/gen_crc32table.c @@ -23,6 +23,7 @@ static uint32_t crc32table_le[LE_TABLE_ROWS][256]; static uint32_t crc32table_be[BE_TABLE_ROWS][256]; +static uint32_t crc32ctable_le[LE_TABLE_ROWS][256]; /** * crc32init_le() - allocate and initialize LE table data @@ -31,27 +32,38 @@ static uint32_t crc32table_be[BE_TABLE_ROWS][256]; * fact that crctable[i^j] = crctable[i] ^ crctable[j]. * */ -static void crc32init_le(void) +static void crc32init_le_generic(const uint32_t polynomial, + uint32_t (*tab)[256]) { unsigned i, j; uint32_t crc = 1; - crc32table_le[0][0] = 0; + tab[0][0] = 0; for (i = LE_TABLE_SIZE >> 1; i; i >>= 1) { - crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); + crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0); for (j = 0; j < LE_TABLE_SIZE; j += 2 * i) - crc32table_le[0][i + j] = crc ^ crc32table_le[0][j]; + tab[0][i + j] = crc ^ tab[0][j]; } for (i = 0; i < LE_TABLE_SIZE; i++) { - crc = crc32table_le[0][i]; + crc = tab[0][i]; for (j = 1; j < LE_TABLE_ROWS; j++) { - crc = crc32table_le[0][crc & 0xff] ^ (crc >> 8); - crc32table_le[j][i] = crc; + crc = tab[0][crc & 0xff] ^ (crc >> 8); + tab[j][i] = crc; } } } +static void crc32init_le(void) +{ + crc32init_le_generic(CRCPOLY_LE, crc32table_le); +} + +static void crc32cinit_le(void) +{ + crc32init_le_generic(CRC32C_POLY_LE, crc32ctable_le); +} + /** * crc32init_be() - allocate and initialize BE table data */ @@ -114,6 +126,15 @@ int main(int argc, char** argv) BE_TABLE_SIZE, "tobe"); printf("};\n"); } + if (CRC_LE_BITS > 1) { + crc32cinit_le(); + printf("static const u32 __cacheline_aligned " + "crc32ctable_le[%d][%d] = {", + LE_TABLE_ROWS, LE_TABLE_SIZE); + output_table(crc32ctable_le, LE_TABLE_ROWS, + LE_TABLE_SIZE, "tole"); + printf("};\n"); + } return 0; } -- cgit v0.10.2 From 6a0962b22eccc70b8421014022c07efcf194a95e Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 23 Mar 2012 15:02:25 -0700 Subject: crypto: crc32c should use library implementation Since lib/crc32.c now provides crc32c, remove the software implementation here and call the library function instead. Signed-off-by: Darrick J. Wong Cc: Herbert Xu Cc: Bob Pearson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/crypto/Kconfig b/crypto/Kconfig index 6318edd..21ff9d0 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -308,6 +308,7 @@ comment "Digest" config CRYPTO_CRC32C tristate "CRC32c CRC algorithm" select CRYPTO_HASH + select CRC32 help Castagnoli, et al Cyclic Redundancy-Check Algorithm. Used by iSCSI for header and data digests and by others. diff --git a/crypto/crc32c.c b/crypto/crc32c.c index 3f9ad28..06f7018 100644 --- a/crypto/crc32c.c +++ b/crypto/crc32c.c @@ -40,6 +40,7 @@ #include #include #include +#include #define CHKSUM_BLOCK_SIZE 1 #define CHKSUM_DIGEST_SIZE 4 @@ -53,95 +54,6 @@ struct chksum_desc_ctx { }; /* - * This is the CRC-32C table - * Generated with: - * width = 32 bits - * poly = 0x1EDC6F41 - * reflect input bytes = true - * reflect output bytes = true - */ - -static const u32 crc32c_table[256] = { - 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L, - 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL, - 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL, - 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L, - 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL, - 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L, - 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L, - 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL, - 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL, - 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L, - 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L, - 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL, - 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L, - 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL, - 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL, - 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L, - 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L, - 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L, - 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L, - 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L, - 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L, - 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L, - 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L, - 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L, - 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L, - 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L, - 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L, - 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L, - 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L, - 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L, - 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L, - 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L, - 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL, - 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L, - 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L, - 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL, - 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L, - 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL, - 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL, - 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L, - 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L, - 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL, - 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL, - 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L, - 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL, - 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L, - 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L, - 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL, - 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L, - 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL, - 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL, - 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L, - 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL, - 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L, - 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L, - 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL, - 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL, - 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L, - 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L, - 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL, - 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L, - 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL, - 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL, - 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L -}; - -/* - * Steps through buffer one byte at at time, calculates reflected - * crc using table. - */ - -static u32 crc32c(u32 crc, const u8 *data, unsigned int length) -{ - while (length--) - crc = crc32c_table[(crc ^ *data++) & 0xFFL] ^ (crc >> 8); - - return crc; -} - -/* * Steps through buffer one byte at at time, calculates reflected * crc using table. */ @@ -179,7 +91,7 @@ static int chksum_update(struct shash_desc *desc, const u8 *data, { struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - ctx->crc = crc32c(ctx->crc, data, length); + ctx->crc = __crc32c_le(ctx->crc, data, length); return 0; } @@ -193,7 +105,7 @@ static int chksum_final(struct shash_desc *desc, u8 *out) static int __chksum_finup(u32 *crcp, const u8 *data, unsigned int len, u8 *out) { - *(__le32 *)out = ~cpu_to_le32(crc32c(*crcp, data, len)); + *(__le32 *)out = ~cpu_to_le32(__crc32c_le(*crcp, data, len)); return 0; } -- cgit v0.10.2 From 577eba9e22e872574c466648b46eeb3e0d04372e Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 23 Mar 2012 15:02:26 -0700 Subject: crc32: add self-test code for crc32c Add self-test code for crc32c. Signed-off-by: Darrick J. Wong Cc: Bob Pearson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/crc32.c b/lib/crc32.c index 87678dd..b0d278f 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -782,113 +782,265 @@ static struct crc_test { u32 length; /* random 11 bit length of test */ u32 crc_le; /* expected crc32_le result */ u32 crc_be; /* expected crc32_be result */ + u32 crc32c_le; /* expected crc32c_le result */ } test[] = { - {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1}, - {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad}, - {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f}, - {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a}, - {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2}, - {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793}, - {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed}, - {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35}, - {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2}, - {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10}, - {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb}, - {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0}, - {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb}, - {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed}, - {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591}, - {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67}, - {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd}, - {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a}, - {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b}, - {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f}, - {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d}, - {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a}, - {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97}, - {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2}, - {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138}, - {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032}, - {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f}, - {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f}, - {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32}, - {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef}, - {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0}, - {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59}, - {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4}, - {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c}, - {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51}, - {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11}, - {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659}, - {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af}, - {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99}, - {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b}, - {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521}, - {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3}, - {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d}, - {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f}, - {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b}, - {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0}, - {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195}, - {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d}, - {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4}, - {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3}, - {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643}, - {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10}, - {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d}, - {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5}, - {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b}, - {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee}, - {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14}, - {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a}, - {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b}, - {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3}, - {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826}, - {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06}, - {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35}, - {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801}, - {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2}, - {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d}, - {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c}, - {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba}, - {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5}, - {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b}, - {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178}, - {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3}, - {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605}, - {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1}, - {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9}, - {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78}, - {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9}, - {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd}, - {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab}, - {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb}, - {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77}, - {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da}, - {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39}, - {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16}, - {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208}, - {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e}, - {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5}, - {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892}, - {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db}, - {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43}, - {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac}, - {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7}, - {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2}, - {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2}, - {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640}, - {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f}, - {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99}, - {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7}, - {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499}, - {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a}, + {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1, + 0xf6e93d6c}, + {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad, + 0x0fe92aca}, + {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f, + 0x52e1ebb8}, + {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a, + 0x0798af9a}, + {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2, + 0x18eb3152}, + {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793, + 0xd00d08c7}, + {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed, + 0x8ba966bc}, + {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35, + 0x11d694a2}, + {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2, + 0x6ab3208d}, + {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10, + 0xba4603c5}, + {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb, + 0xe6071c6f}, + {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0, + 0x179ec30a}, + {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb, + 0x0903beb8}, + {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed, + 0x6a7cb4fa}, + {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591, + 0xdb535801}, + {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67, + 0x92bed597}, + {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd, + 0x192a3f1b}, + {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a, + 0xccbaec1a}, + {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b, + 0x7eabae4d}, + {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f, + 0x28c72982}, + {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d, + 0xc3cd4d18}, + {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a, + 0xbca8f0e7}, + {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97, + 0x713f60b3}, + {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2, + 0xebd08fd5}, + {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138, + 0x64406c59}, + {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032, + 0x7421890e}, + {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f, + 0xe9347603}, + {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f, + 0x1bef9060}, + {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32, + 0x34720072}, + {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef, + 0x48310f59}, + {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0, + 0x783a4213}, + {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59, + 0x9e8efd41}, + {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4, + 0xfc3d34a5}, + {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c, + 0x17a52ae2}, + {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51, + 0x886d935a}, + {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11, + 0xeaaeaeb2}, + {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659, + 0x8e900a4b}, + {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af, + 0xd74662b1}, + {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99, + 0xd26752ba}, + {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b, + 0x8b1fcd62}, + {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521, + 0xf54342fe}, + {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3, + 0x5b95b988}, + {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d, + 0x2e1176be}, + {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f, + 0x66120546}, + {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b, + 0xf256a5cc}, + {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0, + 0x4af1dd69}, + {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195, + 0x56f0a04a}, + {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d, + 0x74f6b6b2}, + {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4, + 0x085951fd}, + {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3, + 0xc65387eb}, + {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643, + 0x1ca9257b}, + {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10, + 0xfd196d76}, + {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d, + 0x5ef88339}, + {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5, + 0x2c3714d9}, + {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b, + 0x58576548}, + {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee, + 0xfd7c57de}, + {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14, + 0xd5fedd59}, + {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a, + 0x1cc3b17b}, + {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b, + 0x270eed73}, + {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3, + 0x91ecbb11}, + {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826, + 0x05ed8d0c}, + {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06, + 0x0b09ad5b}, + {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35, + 0xf8d511fb}, + {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801, + 0x5ad832cc}, + {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2, + 0x1214d196}, + {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d, + 0x5747218a}, + {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c, + 0xde8f14de}, + {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba, + 0x3563b7b9}, + {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5, + 0x071475d0}, + {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b, + 0x54c79d60}, + {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178, + 0x4c53eee6}, + {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3, + 0x10137a3c}, + {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605, + 0xaa9d6c73}, + {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1, + 0xb63d23e7}, + {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9, + 0x7f53e9cf}, + {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78, + 0x13c1cd83}, + {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9, + 0x49ff5867}, + {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd, + 0x8467f211}, + {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab, + 0x3f9683b2}, + {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb, + 0x76a3f874}, + {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77, + 0x863b702f}, + {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da, + 0xdc6c58ff}, + {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39, + 0x0622cc95}, + {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16, + 0xe85605cd}, + {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208, + 0x31da5f06}, + {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e, + 0xa1f2e784}, + {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5, + 0xb07cc616}, + {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892, + 0xbf943b6c}, + {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db, + 0x2c01af1c}, + {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43, + 0x0fe5f56d}, + {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac, + 0xf8943b2d}, + {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7, + 0xe4d89272}, + {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2, + 0x7c2f6bbb}, + {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2, + 0xabbf388b}, + {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640, + 0x1dca1f4e}, + {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f, + 0x5c170e23}, + {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99, + 0xc0e9d672}, + {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7, + 0xc18bdc86}, + {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499, + 0xa874fcdd}, + {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a, + 0x9dc0bb48}, }; #include -static int __init crc32_init(void) +static int __init crc32c_test(void) +{ + int i; + int errors = 0; + int bytes = 0; + struct timespec start, stop; + u64 nsec; + unsigned long flags; + + /* keep static to prevent cache warming code from + * getting eliminated by the compiler */ + static u32 crc; + + /* pre-warm the cache */ + for (i = 0; i < 100; i++) { + bytes += 2*test[i].length; + + crc ^= __crc32c_le(test[i].crc, test_buf + + test[i].start, test[i].length); + } + + /* reduce OS noise */ + local_irq_save(flags); + local_irq_disable(); + + getnstimeofday(&start); + for (i = 0; i < 100; i++) { + if (test[i].crc32c_le != __crc32c_le(test[i].crc, test_buf + + test[i].start, test[i].length)) + errors++; + } + getnstimeofday(&stop); + + local_irq_restore(flags); + local_irq_enable(); + + nsec = stop.tv_nsec - start.tv_nsec + + 1000000000 * (stop.tv_sec - start.tv_sec); + + pr_info("crc32c: CRC_LE_BITS = %d\n", CRC_LE_BITS); + + if (errors) + pr_warn("crc32c: %d self tests failed\n", errors); + else { + pr_info("crc32c: self tests passed, processed %d bytes in %lld nsec\n", + bytes, nsec); + } + + return 0; +} + +static int __init crc32_test(void) { int i; int errors = 0; @@ -947,10 +1099,17 @@ static int __init crc32_init(void) return 0; } +static int __init crc32test_init(void) +{ + crc32_test(); + crc32c_test(); + return 0; +} + static void __exit crc32_exit(void) { } -module_init(crc32_init); +module_init(crc32test_init); module_exit(crc32_exit); #endif /* CONFIG_CRC32_SELFTEST */ -- cgit v0.10.2 From 5cde7656d0dd222170eb0250bd1f70c9018fd438 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 23 Mar 2012 15:02:26 -0700 Subject: crc32: select an algorithm via Kconfig Allow the kernel builder to choose a crc32* algorithm for the kernel. Signed-off-by: Darrick J. Wong Cc: Bob Pearson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/lib/Kconfig b/lib/Kconfig index 6d7ce4b..43359bb 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -80,6 +80,49 @@ config CRC32_SELFTEST and crc32_be over byte strings with random alignment and length and computes the total elapsed time and number of bytes processed. +choice + prompt "CRC32 implementation" + depends on CRC32 + default CRC32_SLICEBY8 + +config CRC32_SLICEBY8 + bool "Slice by 8 bytes" + help + Calculate checksum 8 bytes at a time with a clever slicing algorithm. + This is the fastest algorithm, but comes with a 8KiB lookup table. + Most modern processors have enough cache to hold this table without + thrashing the cache. + + This is the default implementation choice. Choose this one unless + you have a good reason not to. + +config CRC32_SLICEBY4 + bool "Slice by 4 bytes" + help + Calculate checksum 4 bytes at a time with a clever slicing algorithm. + This is a bit slower than slice by 8, but has a smaller 4KiB lookup + table. + + Only choose this option if you know what you are doing. + +config CRC32_SARWATE + bool "Sarwate's Algorithm (one byte at a time)" + help + Calculate checksum a byte at a time using Sarwate's algorithm. This + is not particularly fast, but has a small 256 byte lookup table. + + Only choose this option if you know what you are doing. + +config CRC32_BIT + bool "Classic Algorithm (one bit at a time)" + help + Calculate checksum one bit at a time. This is VERY slow, but has + no lookup table. This is provided as a debugging option. + + Only choose this option if you are debugging crc32. + +endchoice + config CRC7 tristate "CRC7 functions" help diff --git a/lib/crc32defs.h b/lib/crc32defs.h index 6fd1917..64cba2c 100644 --- a/lib/crc32defs.h +++ b/lib/crc32defs.h @@ -13,6 +13,24 @@ */ #define CRC32C_POLY_LE 0x82F63B78 +/* Try to choose an implementation variant via Kconfig */ +#ifdef CONFIG_CRC32_SLICEBY8 +# define CRC_LE_BITS 64 +# define CRC_BE_BITS 64 +#endif +#ifdef CONFIG_CRC32_SLICEBY4 +# define CRC_LE_BITS 32 +# define CRC_BE_BITS 32 +#endif +#ifdef CONFIG_CRC32_SARWATE +# define CRC_LE_BITS 8 +# define CRC_BE_BITS 8 +#endif +#ifdef CONFIG_CRC32_BIT +# define CRC_LE_BITS 1 +# define CRC_BE_BITS 1 +#endif + /* * How many bits at a time to use. Valid values are 1, 2, 4, 8, 32 and 64. * For less performance-sensitive, use 4 or 8 to save table size. -- cgit v0.10.2 From 626cf236608505d376e4799adb4f7eb00a8594af Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 23 Mar 2012 15:02:27 -0700 Subject: poll: add poll_requested_events() and poll_does_not_wait() functions In some cases the poll() implementation in a driver has to do different things depending on the events the caller wants to poll for. An example is when a driver needs to start a DMA engine if the caller polls for POLLIN, but doesn't want to do that if POLLIN is not requested but instead only POLLOUT or POLLPRI is requested. This is something that can happen in the video4linux subsystem among others. Unfortunately, the current epoll/poll/select implementation doesn't provide that information reliably. The poll_table_struct does have it: it has a key field with the event mask. But once a poll() call matches one or more bits of that mask any following poll() calls are passed a NULL poll_table pointer. Also, the eventpoll implementation always left the key field at ~0 instead of using the requested events mask. This was changed in eventpoll.c so the key field now contains the actual events that should be polled for as set by the caller. The solution to the NULL poll_table pointer is to set the qproc field to NULL in poll_table once poll() matches the events, not the poll_table pointer itself. That way drivers can obtain the mask through a new poll_requested_events inline. The poll_table_struct can still be NULL since some kernel code calls it internally (netfs_state_poll() in ./drivers/staging/pohmelfs/netfs.h). In that case poll_requested_events() returns ~0 (i.e. all events). Very rarely drivers might want to know whether poll_wait will actually wait. If another earlier file descriptor in the set already matched the events the caller wanted to wait for, then the kernel will return from the select() call without waiting. This might be useful information in order to avoid doing expensive work. A new helper function poll_does_not_wait() is added that drivers can use to detect this situation. This is now used in sock_poll_wait() in include/net/sock.h. This was the only place in the kernel that needed this information. Drivers should no longer access any of the poll_table internals, but use the poll_requested_events() and poll_does_not_wait() access functions instead. In order to enforce that the poll_table fields are now prepended with an underscore and a comment was added warning against using them directly. This required a change in unix_dgram_poll() in unix/af_unix.c which used the key field to get the requested events. It's been replaced by a call to poll_requested_events(). For qproc it was especially important to change its name since the behavior of that field changes with this patch since this function pointer can now be NULL when that wasn't possible in the past. Any driver accessing the qproc or key fields directly will now fail to compile. Some notes regarding the correctness of this patch: the driver's poll() function is called with a 'struct poll_table_struct *wait' argument. This pointer may or may not be NULL, drivers can never rely on it being one or the other as that depends on whether or not an earlier file descriptor in the select()'s fdset matched the requested events. There are only three things a driver can do with the wait argument: 1) obtain the key field: events = wait ? wait->key : ~0; This will still work although it should be replaced with the new poll_requested_events() function (which does exactly the same). This will now even work better, since wait is no longer set to NULL unnecessarily. 2) use the qproc callback. This could be deadly since qproc can now be NULL. Renaming qproc should prevent this from happening. There are no kernel drivers that actually access this callback directly, BTW. 3) test whether wait == NULL to determine whether poll would return without waiting. This is no longer sufficient as the correct test is now wait == NULL || wait->_qproc == NULL. However, the worst that can happen here is a slight performance hit in the case where wait != NULL and wait->_qproc == NULL. In that case the driver will assume that poll_wait() will actually add the fd to the set of waiting file descriptors. Of course, poll_wait() will not do that since it tests for wait->_qproc. This will not break anything, though. There is only one place in the whole kernel where this happens (sock_poll_wait() in include/net/sock.h) and that code will be replaced by a call to poll_does_not_wait() in the next patch. Note that even if wait->_qproc != NULL drivers cannot rely on poll_wait() actually waiting. The next file descriptor from the set might match the event mask and thus any possible waits will never happen. Signed-off-by: Hans Verkuil Reviewed-by: Jonathan Corbet Reviewed-by: Al Viro Cc: Davide Libenzi Signed-off-by: Hans de Goede Cc: Mauro Carvalho Chehab Cc: David Miller Cc: Eric Dumazet Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 4d9d3a4..ca30007 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -699,9 +699,12 @@ static int ep_read_events_proc(struct eventpoll *ep, struct list_head *head, void *priv) { struct epitem *epi, *tmp; + poll_table pt; + init_poll_funcptr(&pt, NULL); list_for_each_entry_safe(epi, tmp, head, rdllink) { - if (epi->ffd.file->f_op->poll(epi->ffd.file, NULL) & + pt._key = epi->event.events; + if (epi->ffd.file->f_op->poll(epi->ffd.file, &pt) & epi->event.events) return POLLIN | POLLRDNORM; else { @@ -1097,6 +1100,7 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event, /* Initialize the poll table using the queue callback */ epq.epi = epi; init_poll_funcptr(&epq.pt, ep_ptable_queue_proc); + epq.pt._key = event->events; /* * Attach the item to the poll hooks and get current event bits. @@ -1191,6 +1195,9 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even { int pwake = 0; unsigned int revents; + poll_table pt; + + init_poll_funcptr(&pt, NULL); /* * Set the new event interest mask before calling f_op->poll(); @@ -1198,13 +1205,14 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even * f_op->poll() call and the new event set registering. */ epi->event.events = event->events; + pt._key = event->events; epi->event.data = event->data; /* protected by mtx */ /* * Get current event bits. We can safely use the file* here because * its usage count has been increased by the caller of this function. */ - revents = epi->ffd.file->f_op->poll(epi->ffd.file, NULL); + revents = epi->ffd.file->f_op->poll(epi->ffd.file, &pt); /* * If the item is "hot" and it is not registered inside the ready @@ -1239,6 +1247,9 @@ static int ep_send_events_proc(struct eventpoll *ep, struct list_head *head, unsigned int revents; struct epitem *epi; struct epoll_event __user *uevent; + poll_table pt; + + init_poll_funcptr(&pt, NULL); /* * We can loop without lock because we are passed a task private list. @@ -1251,7 +1262,8 @@ static int ep_send_events_proc(struct eventpoll *ep, struct list_head *head, list_del_init(&epi->rdllink); - revents = epi->ffd.file->f_op->poll(epi->ffd.file, NULL) & + pt._key = epi->event.events; + revents = epi->ffd.file->f_op->poll(epi->ffd.file, &pt) & epi->event.events; /* diff --git a/fs/select.c b/fs/select.c index e782258..ecfd0b1 100644 --- a/fs/select.c +++ b/fs/select.c @@ -223,7 +223,7 @@ static void __pollwait(struct file *filp, wait_queue_head_t *wait_address, get_file(filp); entry->filp = filp; entry->wait_address = wait_address; - entry->key = p->key; + entry->key = p->_key; init_waitqueue_func_entry(&entry->wait, pollwake); entry->wait.private = pwq; add_wait_queue(wait_address, &entry->wait); @@ -386,13 +386,11 @@ get_max: static inline void wait_key_set(poll_table *wait, unsigned long in, unsigned long out, unsigned long bit) { - if (wait) { - wait->key = POLLEX_SET; - if (in & bit) - wait->key |= POLLIN_SET; - if (out & bit) - wait->key |= POLLOUT_SET; - } + wait->_key = POLLEX_SET; + if (in & bit) + wait->_key |= POLLIN_SET; + if (out & bit) + wait->_key |= POLLOUT_SET; } int do_select(int n, fd_set_bits *fds, struct timespec *end_time) @@ -414,7 +412,7 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time) poll_initwait(&table); wait = &table.pt; if (end_time && !end_time->tv_sec && !end_time->tv_nsec) { - wait = NULL; + wait->_qproc = NULL; timed_out = 1; } @@ -459,17 +457,17 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time) if ((mask & POLLIN_SET) && (in & bit)) { res_in |= bit; retval++; - wait = NULL; + wait->_qproc = NULL; } if ((mask & POLLOUT_SET) && (out & bit)) { res_out |= bit; retval++; - wait = NULL; + wait->_qproc = NULL; } if ((mask & POLLEX_SET) && (ex & bit)) { res_ex |= bit; retval++; - wait = NULL; + wait->_qproc = NULL; } } } @@ -481,7 +479,7 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time) *rexp = res_ex; cond_resched(); } - wait = NULL; + wait->_qproc = NULL; if (retval || timed_out || signal_pending(current)) break; if (table.error) { @@ -720,7 +718,7 @@ struct poll_list { * interested in events matching the pollfd->events mask, and the result * matching that mask is both recorded in pollfd->revents and returned. The * pwait poll_table will be used by the fd-provided poll handler for waiting, - * if non-NULL. + * if pwait->_qproc is non-NULL. */ static inline unsigned int do_pollfd(struct pollfd *pollfd, poll_table *pwait) { @@ -738,9 +736,7 @@ static inline unsigned int do_pollfd(struct pollfd *pollfd, poll_table *pwait) if (file != NULL) { mask = DEFAULT_POLLMASK; if (file->f_op && file->f_op->poll) { - if (pwait) - pwait->key = pollfd->events | - POLLERR | POLLHUP; + pwait->_key = pollfd->events|POLLERR|POLLHUP; mask = file->f_op->poll(file, pwait); } /* Mask out unneeded events. */ @@ -763,7 +759,7 @@ static int do_poll(unsigned int nfds, struct poll_list *list, /* Optimise the no-wait case */ if (end_time && !end_time->tv_sec && !end_time->tv_nsec) { - pt = NULL; + pt->_qproc = NULL; timed_out = 1; } @@ -781,22 +777,22 @@ static int do_poll(unsigned int nfds, struct poll_list *list, for (; pfd != pfd_end; pfd++) { /* * Fish for events. If we found one, record it - * and kill the poll_table, so we don't + * and kill poll_table->_qproc, so we don't * needlessly register any other waiters after * this. They'll get immediately deregistered * when we break out and return. */ if (do_pollfd(pfd, pt)) { count++; - pt = NULL; + pt->_qproc = NULL; } } } /* * All waiters have already been registered, so don't provide - * a poll_table to them on the next loop iteration. + * a poll_table->_qproc to them on the next loop iteration. */ - pt = NULL; + pt->_qproc = NULL; if (!count) { count = wait->error; if (signal_pending(current)) diff --git a/include/linux/poll.h b/include/linux/poll.h index cf40010..48fe8bc 100644 --- a/include/linux/poll.h +++ b/include/linux/poll.h @@ -32,21 +32,46 @@ struct poll_table_struct; */ typedef void (*poll_queue_proc)(struct file *, wait_queue_head_t *, struct poll_table_struct *); +/* + * Do not touch the structure directly, use the access functions + * poll_does_not_wait() and poll_requested_events() instead. + */ typedef struct poll_table_struct { - poll_queue_proc qproc; - unsigned long key; + poll_queue_proc _qproc; + unsigned long _key; } poll_table; static inline void poll_wait(struct file * filp, wait_queue_head_t * wait_address, poll_table *p) { - if (p && wait_address) - p->qproc(filp, wait_address, p); + if (p && p->_qproc && wait_address) + p->_qproc(filp, wait_address, p); +} + +/* + * Return true if it is guaranteed that poll will not wait. This is the case + * if the poll() of another file descriptor in the set got an event, so there + * is no need for waiting. + */ +static inline bool poll_does_not_wait(const poll_table *p) +{ + return p == NULL || p->_qproc == NULL; +} + +/* + * Return the set of events that the application wants to poll for. + * This is useful for drivers that need to know whether a DMA transfer has + * to be started implicitly on poll(). You typically only want to do that + * if the application is actually polling for POLLIN and/or POLLOUT. + */ +static inline unsigned long poll_requested_events(const poll_table *p) +{ + return p ? p->_key : ~0UL; } static inline void init_poll_funcptr(poll_table *pt, poll_queue_proc qproc) { - pt->qproc = qproc; - pt->key = ~0UL; /* all events enabled */ + pt->_qproc = qproc; + pt->_key = ~0UL; /* all events enabled */ } struct poll_table_entry { diff --git a/include/net/sock.h b/include/net/sock.h index 04bc0b3..a6ba1f8 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1854,7 +1854,7 @@ static inline bool wq_has_sleeper(struct socket_wq *wq) static inline void sock_poll_wait(struct file *filp, wait_queue_head_t *wait_address, poll_table *p) { - if (p && wait_address) { + if (!poll_does_not_wait(p) && wait_address) { poll_wait(filp, wait_address, p); /* * We need to be sure we are in sync with the diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index eb4277c..d510353 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -2206,7 +2206,7 @@ static unsigned int unix_dgram_poll(struct file *file, struct socket *sock, } /* No write status requested, avoid expensive OUT tests. */ - if (wait && !(wait->key & (POLLWRBAND | POLLWRNORM | POLLOUT))) + if (!(poll_requested_events(wait) & (POLLWRBAND|POLLWRNORM|POLLOUT))) return mask; writable = unix_writable(sk); -- cgit v0.10.2 From 02edc6fc4d5feb3357aa44ba521e5504b4ff0b60 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 23 Mar 2012 15:02:27 -0700 Subject: epoll: comment the funky #ifdef Looking for a bug in -rt, I stumbled across this code here from: commit 2dfa4eeab0fc ("epoll keyed wakeups: teach epoll about hints coming with the wakeup key"), specifically: #ifdef CONFIG_DEBUG_LOCK_ALLOC static inline void ep_wake_up_nested(wait_queue_head_t *wqueue, unsigned long events, int subclass) { unsigned long flags; spin_lock_irqsave_nested(&wqueue->lock, flags, subclass); wake_up_locked_poll(wqueue, events); spin_unlock_irqrestore(&wqueue->lock, flags); } #else static inline void ep_wake_up_nested(wait_queue_head_t *wqueue, unsigned long events, int subclass) { wake_up_poll(wqueue, events); } #endif You change the function of ep_wake_up_nested() depending on whether CONFIG_DEBUG_LOCK_ALLOC is set or not. This looks awfully suspicious, and there's no comment to explain why. I initially thought that this was trying to fool lockdep, and hiding a real bug. Investigating it, I found the creation of wake_up_nested() (which no longer exists) but was created for the sole purpose of epoll and its strange wake ups, as explained in commit 0ccf831cbee9 ("lockdep: annotate epoll") Although the commit message says "annotate epoll" the change log is much better at explaining what is happening than what is in the actual code. Thus a comment is really necessary here. And to save the time of other developers from having to go trudging through the git logs trying to figure out why this code exists. I took parts of the change log and placed it into a comment above the affected code. This will make the description of what is happening more visible to new developers that have to look at this code for the first time. Signed-off-by: Steven Rostedt Cc: Davide Libenzi Cc: Peter Zijlstra Cc: Alan Cox Cc: Ingo Molnar Cc: David Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/eventpoll.c b/fs/eventpoll.c index ca30007..23c2207 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -427,6 +427,31 @@ out_unlock: return error; } +/* + * As described in commit 0ccf831cb lockdep: annotate epoll + * the use of wait queues used by epoll is done in a very controlled + * manner. Wake ups can nest inside each other, but are never done + * with the same locking. For example: + * + * dfd = socket(...); + * efd1 = epoll_create(); + * efd2 = epoll_create(); + * epoll_ctl(efd1, EPOLL_CTL_ADD, dfd, ...); + * epoll_ctl(efd2, EPOLL_CTL_ADD, efd1, ...); + * + * When a packet arrives to the device underneath "dfd", the net code will + * issue a wake_up() on its poll wake list. Epoll (efd1) has installed a + * callback wakeup entry on that queue, and the wake_up() performed by the + * "dfd" net code will end up in ep_poll_callback(). At this point epoll + * (efd1) notices that it may have some event ready, so it needs to wake up + * the waiters on its poll wait list (efd2). So it calls ep_poll_safewake() + * that ends up in another wake_up(), after having checked about the + * recursion constraints. That are, no more than EP_MAX_POLLWAKE_NESTS, to + * avoid stack blasting. + * + * When CONFIG_DEBUG_LOCK_ALLOC is enabled, make sure lockdep can handle + * this special case of epoll. + */ #ifdef CONFIG_DEBUG_LOCK_ALLOC static inline void ep_wake_up_nested(wait_queue_head_t *wqueue, unsigned long events, int subclass) -- cgit v0.10.2 From da0503aae07f0410b6ff0a9e1d1d011701eb2758 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 23 Mar 2012 15:02:28 -0700 Subject: epoll: remove unneeded variable in reverse_path_check() We never use the length variable. Signed-off-by: Dan Carpenter Acked-by: Jason Baron Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 23c2207..629e9ed 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1077,13 +1077,11 @@ static int reverse_path_check_proc(void *priv, void *cookie, int call_nests) */ static int reverse_path_check(void) { - int length = 0; int error = 0; struct file *current_file; /* let's call this for all tfiles */ list_for_each_entry(current_file, &tfile_check_list, f_tfile_llink) { - length++; path_count_init(); error = ep_call_nested(&poll_loop_ncalls, EP_MAX_NESTS, reverse_path_check_proc, current_file, -- cgit v0.10.2 From 8595c539f0360477189eef91f6337ba44962f72d Mon Sep 17 00:00:00 2001 From: Diwakar Tundlam Date: Fri, 23 Mar 2012 15:02:28 -0700 Subject: init: check printed flag to skip printing message Otherwise the 'Calibration skipped' message gets printed everytime a CPU is hotplugged in, cluttering console for systems that frequently hotplug CPUs. Signed-off-by: Diwakar Tundlam Cc: Phil Carmody Cc: Russell King Cc: Greg KH Cc: Sameer Nanda Cc: Peter De Schrijver Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/init/calibrate.c b/init/calibrate.c index 5f117ca..fda0a7b 100644 --- a/init/calibrate.c +++ b/init/calibrate.c @@ -267,7 +267,8 @@ void __cpuinit calibrate_delay(void) if (per_cpu(cpu_loops_per_jiffy, this_cpu)) { lpj = per_cpu(cpu_loops_per_jiffy, this_cpu); - pr_info("Calibrating delay loop (skipped) " + if (!printed) + pr_info("Calibrating delay loop (skipped) " "already calibrated this CPU"); } else if (preset_lpj) { lpj = preset_lpj; -- cgit v0.10.2 From 0e0cb892a8dac7c76321c899934705e5f0812574 Mon Sep 17 00:00:00 2001 From: Bernhard Walle Date: Fri, 23 Mar 2012 15:02:28 -0700 Subject: init/do_mounts.c: print error code on mount failure Printing the error code makes it easier to debug the cause of a mount failure. For example I had the problem that the root file system could not be mounted read-writeable because my SD card was write-protected. Without an error code it looks like the SD card was not detected at all. Signed-off-by: Bernhard Walle Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/init/do_mounts.c b/init/do_mounts.c index 2974c8b3..0e93f92 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -373,8 +373,8 @@ retry: #ifdef CONFIG_BLOCK __bdevname(ROOT_DEV, b); #endif - printk("VFS: Cannot open root device \"%s\" or %s\n", - root_device_name, b); + printk("VFS: Cannot open root device \"%s\" or %s: error %d\n", + root_device_name, b, err); printk("Please append a correct \"root=\" boot option; here are the available partitions:\n"); printk_all_partitions(); -- cgit v0.10.2 From cd0e08a8c9fb9c50d182d20e3bc52452c1ce1bfb Mon Sep 17 00:00:00 2001 From: Deepak Sikri Date: Fri, 23 Mar 2012 15:02:29 -0700 Subject: rtc-spear: fix for balancing the enable_irq_wake in Power Mgmt Handle the fix for unbalanced irq for the cases when enable_irq_wake fails, and a warning related to same is displayed on the console. The workaround is handled at the driver level. Signed-off-by: Deepak Sikri Signed-off-by: Viresh Kumar Acked-by: Rajeev Kumar Cc: Shiraz Hashim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c index 19a28a6..4f068e9 100644 --- a/drivers/rtc/rtc-spear.c +++ b/drivers/rtc/rtc-spear.c @@ -80,6 +80,7 @@ struct spear_rtc_config { struct clk *clk; spinlock_t lock; void __iomem *ioaddr; + unsigned int irq_wake; }; static inline void spear_rtc_clear_interrupt(struct spear_rtc_config *config) @@ -463,9 +464,10 @@ static int spear_rtc_suspend(struct platform_device *pdev, pm_message_t state) int irq; irq = platform_get_irq(pdev, 0); - if (device_may_wakeup(&pdev->dev)) - enable_irq_wake(irq); - else { + if (device_may_wakeup(&pdev->dev)) { + if (!enable_irq_wake(irq)) + config->irq_wake = 1; + } else { spear_rtc_disable_interrupt(config); clk_disable(config->clk); } @@ -481,9 +483,12 @@ static int spear_rtc_resume(struct platform_device *pdev) irq = platform_get_irq(pdev, 0); - if (device_may_wakeup(&pdev->dev)) - disable_irq_wake(irq); - else { + if (device_may_wakeup(&pdev->dev)) { + if (config->irq_wake) { + disable_irq_wake(irq); + config->irq_wake = 0; + } + } else { clk_enable(config->clk); spear_rtc_enable_interrupt(config); } -- cgit v0.10.2 From 131f8b75f1c00a5a822ff2103db588466e942490 Mon Sep 17 00:00:00 2001 From: Shiraz Hashim Date: Fri, 23 Mar 2012 15:02:29 -0700 Subject: rtc/spear: fix for RTC_AIE_ON and RTC_AIE_OFF ioctl errors Define API for '.alarm_irq_enable' to enable and disable alarm irq. This is required by the framework else RTC_AIE_ON and RTC_AIE_OFF ioctls return errors. Signed-off-by: Shiraz Hashim Signed-off-by: Viresh Kumar Cc: Deepak Sikri Acked-by: Rajeev Kumar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c index 4f068e9..6469374 100644 --- a/drivers/rtc/rtc-spear.c +++ b/drivers/rtc/rtc-spear.c @@ -327,11 +327,39 @@ static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) return 0; } + +static int spear_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + int ret = 0; + + spear_rtc_clear_interrupt(config); + + switch (enabled) { + case 0: + /* alarm off */ + spear_rtc_disable_interrupt(config); + break; + case 1: + /* alarm on */ + spear_rtc_enable_interrupt(config); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + static struct rtc_class_ops spear_rtc_ops = { .read_time = spear_rtc_read_time, .set_time = spear_rtc_set_time, .read_alarm = spear_rtc_read_alarm, .set_alarm = spear_rtc_set_alarm, + .alarm_irq_enable = spear_alarm_irq_enable, }; static int __devinit spear_rtc_probe(struct platform_device *pdev) -- cgit v0.10.2 From ee6c54ca64416c75aa6f5021e139f270192bae49 Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Fri, 23 Mar 2012 15:02:30 -0700 Subject: rtc/rtc-spear: call platform_set_drvdata() before registering rtc device rtc_device_register() calls rtc-spear routines internally. These routines call dev_get_drvdata() to get struct spear_rtc_config. Currently, platform_set_drvdata is called after rtc device is registered. This causes system to crash, as dev_get_drvdata returns NULL. For this we need to call platform_set_drvdata() before registering rtc device. This requires further cleanup, that leads to removal of dev_set_drvdata on rtc->dev, which was just not required at all. Also, we change the parameter to request_irq and pass pointer to config instead of pointer to rtc struct. This patch brings all above changes. Signed-off-by: Viresh Kumar Cc: Shiraz Hashim Cc: Deepak Sikri Acked-by: Rajeev Kumar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c index 6469374..e38da0d 100644 --- a/drivers/rtc/rtc-spear.c +++ b/drivers/rtc/rtc-spear.c @@ -77,6 +77,7 @@ #define STATUS_FAIL (LOST_WR_TIME | LOST_WR_DATE) struct spear_rtc_config { + struct rtc_device *rtc; struct clk *clk; spinlock_t lock; void __iomem *ioaddr; @@ -150,8 +151,7 @@ static void rtc_wait_not_busy(struct spear_rtc_config *config) static irqreturn_t spear_rtc_irq(int irq, void *dev_id) { - struct rtc_device *rtc = (struct rtc_device *)dev_id; - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = dev_id; unsigned long flags, events = 0; unsigned int irq_data; @@ -162,7 +162,7 @@ static irqreturn_t spear_rtc_irq(int irq, void *dev_id) if ((irq_data & RTC_INT_MASK)) { spear_rtc_clear_interrupt(config); events = RTC_IRQF | RTC_AF; - rtc_update_irq(rtc, 1, events); + rtc_update_irq(config->rtc, 1, events); return IRQ_HANDLED; } else return IRQ_NONE; @@ -204,9 +204,7 @@ static void bcd2tm(struct rtc_time *tm) */ static int spear_rtc_read_time(struct device *dev, struct rtc_time *tm) { - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = dev_get_drvdata(dev); unsigned int time, date; /* we don't report wday/yday/isdst ... */ @@ -235,9 +233,7 @@ static int spear_rtc_read_time(struct device *dev, struct rtc_time *tm) */ static int spear_rtc_set_time(struct device *dev, struct rtc_time *tm) { - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = dev_get_drvdata(dev); unsigned int time, date, err = 0; if (tm2bcd(tm) < 0) @@ -267,9 +263,7 @@ static int spear_rtc_set_time(struct device *dev, struct rtc_time *tm) */ static int spear_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) { - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = dev_get_drvdata(dev); unsigned int time, date; rtc_wait_not_busy(config); @@ -299,9 +293,7 @@ static int spear_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) */ static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) { - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = dev_get_drvdata(dev); unsigned int time, date, err = 0; if (tm2bcd(&alm->time) < 0) @@ -330,9 +322,7 @@ static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) static int spear_alarm_irq_enable(struct device *dev, unsigned int enabled) { - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = dev_get_drvdata(dev); int ret = 0; spear_rtc_clear_interrupt(config); @@ -365,7 +355,6 @@ static struct rtc_class_ops spear_rtc_ops = { static int __devinit spear_rtc_probe(struct platform_device *pdev) { struct resource *res; - struct rtc_device *rtc; struct spear_rtc_config *config; unsigned int status = 0; int irq; @@ -405,19 +394,17 @@ static int __devinit spear_rtc_probe(struct platform_device *pdev) } spin_lock_init(&config->lock); + platform_set_drvdata(pdev, config); - rtc = rtc_device_register(pdev->name, &pdev->dev, &spear_rtc_ops, - THIS_MODULE); - if (IS_ERR(rtc)) { + config->rtc = rtc_device_register(pdev->name, &pdev->dev, + &spear_rtc_ops, THIS_MODULE); + if (IS_ERR(config->rtc)) { dev_err(&pdev->dev, "can't register RTC device, err %ld\n", - PTR_ERR(rtc)); - status = PTR_ERR(rtc); + PTR_ERR(config->rtc)); + status = PTR_ERR(config->rtc); goto err_iounmap; } - platform_set_drvdata(pdev, rtc); - dev_set_drvdata(&rtc->dev, config); - /* alarm irqs */ irq = platform_get_irq(pdev, 0); if (irq < 0) { @@ -426,7 +413,7 @@ static int __devinit spear_rtc_probe(struct platform_device *pdev) goto err_clear_platdata; } - status = request_irq(irq, spear_rtc_irq, 0, pdev->name, rtc); + status = request_irq(irq, spear_rtc_irq, 0, pdev->name, config); if (status) { dev_err(&pdev->dev, "Alarm interrupt IRQ%d already \ claimed\n", irq); @@ -440,8 +427,7 @@ static int __devinit spear_rtc_probe(struct platform_device *pdev) err_clear_platdata: platform_set_drvdata(pdev, NULL); - dev_set_drvdata(&rtc->dev, NULL); - rtc_device_unregister(rtc); + rtc_device_unregister(config->rtc); err_iounmap: iounmap(config->ioaddr); err_disable_clock: @@ -458,8 +444,7 @@ err_release_region: static int __devexit spear_rtc_remove(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = platform_get_drvdata(pdev); int irq; struct resource *res; @@ -477,8 +462,7 @@ static int __devexit spear_rtc_remove(struct platform_device *pdev) if (res) release_mem_region(res->start, resource_size(res)); platform_set_drvdata(pdev, NULL); - dev_set_drvdata(&rtc->dev, NULL); - rtc_device_unregister(rtc); + rtc_device_unregister(config->rtc); return 0; } @@ -487,8 +471,7 @@ static int __devexit spear_rtc_remove(struct platform_device *pdev) static int spear_rtc_suspend(struct platform_device *pdev, pm_message_t state) { - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = platform_get_drvdata(pdev); int irq; irq = platform_get_irq(pdev, 0); @@ -505,8 +488,7 @@ static int spear_rtc_suspend(struct platform_device *pdev, pm_message_t state) static int spear_rtc_resume(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = platform_get_drvdata(pdev); int irq; irq = platform_get_irq(pdev, 0); @@ -531,8 +513,7 @@ static int spear_rtc_resume(struct platform_device *pdev) static void spear_rtc_shutdown(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(pdev); - struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct spear_rtc_config *config = platform_get_drvdata(pdev); spear_rtc_disable_interrupt(config); clk_disable(config->clk); -- cgit v0.10.2 From 109e941843893cb1b4f7bed24c615ba84ce00ff5 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 23 Mar 2012 15:02:30 -0700 Subject: rtc: convert rtc spi drivers to module_spi_driver Factor out some boilerplate code for spi driver registration into module_spi_driver. Signed-off-by: Axel Lin Cc: Mark Jackson Cc: Dennis Aberilla Cc: Nikolaus Voss Cc: "Kim B. Heino" Cc: Raphael Assenat Cc: Chris Verges Cc: Magnus Damm Cc: Atsushi Nemoto Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c index 3a33b1f..686a865 100644 --- a/drivers/rtc/rtc-ds1305.c +++ b/drivers/rtc/rtc-ds1305.c @@ -814,17 +814,7 @@ static struct spi_driver ds1305_driver = { /* REVISIT add suspend/resume */ }; -static int __init ds1305_init(void) -{ - return spi_register_driver(&ds1305_driver); -} -module_init(ds1305_init); - -static void __exit ds1305_exit(void) -{ - spi_unregister_driver(&ds1305_driver); -} -module_exit(ds1305_exit); +module_spi_driver(ds1305_driver); MODULE_DESCRIPTION("RTC driver for DS1305 and DS1306 chips"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ds1390.c b/drivers/rtc/rtc-ds1390.c index b038d2c..b0a99e1 100644 --- a/drivers/rtc/rtc-ds1390.c +++ b/drivers/rtc/rtc-ds1390.c @@ -175,17 +175,7 @@ static struct spi_driver ds1390_driver = { .remove = __devexit_p(ds1390_remove), }; -static __init int ds1390_init(void) -{ - return spi_register_driver(&ds1390_driver); -} -module_init(ds1390_init); - -static __exit void ds1390_exit(void) -{ - spi_unregister_driver(&ds1390_driver); -} -module_exit(ds1390_exit); +module_spi_driver(ds1390_driver); MODULE_DESCRIPTION("Dallas/Maxim DS1390/93/94 SPI RTC driver"); MODULE_AUTHOR("Mark Jackson "); diff --git a/drivers/rtc/rtc-ds3234.c b/drivers/rtc/rtc-ds3234.c index bbd2622..fda7079 100644 --- a/drivers/rtc/rtc-ds3234.c +++ b/drivers/rtc/rtc-ds3234.c @@ -173,17 +173,7 @@ static struct spi_driver ds3234_driver = { .remove = __devexit_p(ds3234_remove), }; -static __init int ds3234_init(void) -{ - return spi_register_driver(&ds3234_driver); -} -module_init(ds3234_init); - -static __exit void ds3234_exit(void) -{ - spi_unregister_driver(&ds3234_driver); -} -module_exit(ds3234_exit); +module_spi_driver(ds3234_driver); MODULE_DESCRIPTION("DS3234 SPI RTC driver"); MODULE_AUTHOR("Dennis Aberilla "); diff --git a/drivers/rtc/rtc-m41t93.c b/drivers/rtc/rtc-m41t93.c index ef71132..10f1c29 100644 --- a/drivers/rtc/rtc-m41t93.c +++ b/drivers/rtc/rtc-m41t93.c @@ -206,17 +206,7 @@ static struct spi_driver m41t93_driver = { .remove = __devexit_p(m41t93_remove), }; -static __init int m41t93_init(void) -{ - return spi_register_driver(&m41t93_driver); -} -module_init(m41t93_init); - -static __exit void m41t93_exit(void) -{ - spi_unregister_driver(&m41t93_driver); -} -module_exit(m41t93_exit); +module_spi_driver(m41t93_driver); MODULE_AUTHOR("Nikolaus Voss "); MODULE_DESCRIPTION("Driver for ST M41T93 SPI RTC"); diff --git a/drivers/rtc/rtc-m41t94.c b/drivers/rtc/rtc-m41t94.c index 2a4721f..6e78193 100644 --- a/drivers/rtc/rtc-m41t94.c +++ b/drivers/rtc/rtc-m41t94.c @@ -153,19 +153,7 @@ static struct spi_driver m41t94_driver = { .remove = __devexit_p(m41t94_remove), }; -static __init int m41t94_init(void) -{ - return spi_register_driver(&m41t94_driver); -} - -module_init(m41t94_init); - -static __exit void m41t94_exit(void) -{ - spi_unregister_driver(&m41t94_driver); -} - -module_exit(m41t94_exit); +module_spi_driver(m41t94_driver); MODULE_AUTHOR("Kim B. Heino "); MODULE_DESCRIPTION("Driver for ST M41T94 SPI RTC"); diff --git a/drivers/rtc/rtc-max6902.c b/drivers/rtc/rtc-max6902.c index 1f6b3cc..36c74d2 100644 --- a/drivers/rtc/rtc-max6902.c +++ b/drivers/rtc/rtc-max6902.c @@ -160,17 +160,7 @@ static struct spi_driver max6902_driver = { .remove = __devexit_p(max6902_remove), }; -static __init int max6902_init(void) -{ - return spi_register_driver(&max6902_driver); -} -module_init(max6902_init); - -static __exit void max6902_exit(void) -{ - spi_unregister_driver(&max6902_driver); -} -module_exit(max6902_exit); +module_spi_driver(max6902_driver); MODULE_DESCRIPTION ("max6902 spi RTC driver"); MODULE_AUTHOR ("Raphael Assenat"); diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c index b46c400..8361187 100644 --- a/drivers/rtc/rtc-pcf2123.c +++ b/drivers/rtc/rtc-pcf2123.c @@ -346,20 +346,9 @@ static struct spi_driver pcf2123_driver = { .remove = __devexit_p(pcf2123_remove), }; -static int __init pcf2123_init(void) -{ - return spi_register_driver(&pcf2123_driver); -} - -static void __exit pcf2123_exit(void) -{ - spi_unregister_driver(&pcf2123_driver); -} +module_spi_driver(pcf2123_driver); MODULE_AUTHOR("Chris Verges "); MODULE_DESCRIPTION("NXP PCF2123 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(pcf2123_init); -module_exit(pcf2123_exit); diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c index 2853c2a..7f8e6c2 100644 --- a/drivers/rtc/rtc-r9701.c +++ b/drivers/rtc/rtc-r9701.c @@ -159,17 +159,7 @@ static struct spi_driver r9701_driver = { .remove = __devexit_p(r9701_remove), }; -static __init int r9701_init(void) -{ - return spi_register_driver(&r9701_driver); -} -module_init(r9701_init); - -static __exit void r9701_exit(void) -{ - spi_unregister_driver(&r9701_driver); -} -module_exit(r9701_exit); +module_spi_driver(r9701_driver); MODULE_DESCRIPTION("r9701 spi RTC driver"); MODULE_AUTHOR("Magnus Damm "); diff --git a/drivers/rtc/rtc-rs5c348.c b/drivers/rtc/rtc-rs5c348.c index ce2ca85..77074cc 100644 --- a/drivers/rtc/rtc-rs5c348.c +++ b/drivers/rtc/rtc-rs5c348.c @@ -235,18 +235,7 @@ static struct spi_driver rs5c348_driver = { .remove = __devexit_p(rs5c348_remove), }; -static __init int rs5c348_init(void) -{ - return spi_register_driver(&rs5c348_driver); -} - -static __exit void rs5c348_exit(void) -{ - spi_unregister_driver(&rs5c348_driver); -} - -module_init(rs5c348_init); -module_exit(rs5c348_exit); +module_spi_driver(rs5c348_driver); MODULE_AUTHOR("Atsushi Nemoto "); MODULE_DESCRIPTION("Ricoh RS5C348 RTC driver"); -- cgit v0.10.2 From 0abc920116303e81702a38429a1b61a896e02b37 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 23 Mar 2012 15:02:31 -0700 Subject: rtc: convert rtc i2c drivers to module_i2c_driver Factor out some boilerplate code for i2c driver registration into module_i2c_driver. Signed-off-by: Axel Lin Cc: Piotr Ziecik Cc: Alessandro Zummo Cc: Scott Wood Cc: Srikanth Srinivasan Cc: Mike Rapoport Cc: Sergey Lapin Cc: Roman Fietze Cc: Herbert Valerio Riedel Cc: Alexander Bigga Cc: Dale Farnsworth Cc: Gregory Hermant Cc: Wolfgang Grandegger Cc: Martyn Welch Cc: Byron Bradley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-bq32k.c b/drivers/rtc/rtc-bq32k.c index 408cc8f..f090159 100644 --- a/drivers/rtc/rtc-bq32k.c +++ b/drivers/rtc/rtc-bq32k.c @@ -187,17 +187,7 @@ static struct i2c_driver bq32k_driver = { .id_table = bq32k_id, }; -static __init int bq32k_init(void) -{ - return i2c_add_driver(&bq32k_driver); -} -module_init(bq32k_init); - -static __exit void bq32k_exit(void) -{ - i2c_del_driver(&bq32k_driver); -} -module_exit(bq32k_exit); +module_i2c_driver(bq32k_driver); MODULE_AUTHOR("Semihalf, Piotr Ziecik "); MODULE_DESCRIPTION("TI BQ32000 I2C RTC driver"); diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 62b0763..58edcb0 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -938,17 +938,7 @@ static struct i2c_driver ds1307_driver = { .id_table = ds1307_id, }; -static int __init ds1307_init(void) -{ - return i2c_add_driver(&ds1307_driver); -} -module_init(ds1307_init); - -static void __exit ds1307_exit(void) -{ - i2c_del_driver(&ds1307_driver); -} -module_exit(ds1307_exit); +module_i2c_driver(ds1307_driver); MODULE_DESCRIPTION("RTC driver for DS1307 and similar chips"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c index e6e71de..9663160 100644 --- a/drivers/rtc/rtc-ds1374.c +++ b/drivers/rtc/rtc-ds1374.c @@ -446,18 +446,7 @@ static struct i2c_driver ds1374_driver = { .id_table = ds1374_id, }; -static int __init ds1374_init(void) -{ - return i2c_add_driver(&ds1374_driver); -} - -static void __exit ds1374_exit(void) -{ - i2c_del_driver(&ds1374_driver); -} - -module_init(ds1374_init); -module_exit(ds1374_exit); +module_i2c_driver(ds1374_driver); MODULE_AUTHOR("Scott Wood "); MODULE_DESCRIPTION("Maxim/Dallas DS1374 RTC Driver"); diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c index a319402..7fa67d0 100644 --- a/drivers/rtc/rtc-ds1672.c +++ b/drivers/rtc/rtc-ds1672.c @@ -202,20 +202,9 @@ static struct i2c_driver ds1672_driver = { .id_table = ds1672_id, }; -static int __init ds1672_init(void) -{ - return i2c_add_driver(&ds1672_driver); -} - -static void __exit ds1672_exit(void) -{ - i2c_del_driver(&ds1672_driver); -} +module_i2c_driver(ds1672_driver); MODULE_AUTHOR("Alessandro Zummo "); MODULE_DESCRIPTION("Dallas/Maxim DS1672 timekeeper driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(ds1672_init); -module_exit(ds1672_exit); diff --git a/drivers/rtc/rtc-ds3232.c b/drivers/rtc/rtc-ds3232.c index 27b7bf6..e194509 100644 --- a/drivers/rtc/rtc-ds3232.c +++ b/drivers/rtc/rtc-ds3232.c @@ -473,18 +473,7 @@ static struct i2c_driver ds3232_driver = { .id_table = ds3232_id, }; -static int __init ds3232_init(void) -{ - return i2c_add_driver(&ds3232_driver); -} - -static void __exit ds3232_exit(void) -{ - i2c_del_driver(&ds3232_driver); -} - -module_init(ds3232_init); -module_exit(ds3232_exit); +module_i2c_driver(ds3232_driver); MODULE_AUTHOR("Srikanth Srinivasan "); MODULE_DESCRIPTION("Maxim/Dallas DS3232 RTC Driver"); diff --git a/drivers/rtc/rtc-em3027.c b/drivers/rtc/rtc-em3027.c index 8414dea..0104ea7 100644 --- a/drivers/rtc/rtc-em3027.c +++ b/drivers/rtc/rtc-em3027.c @@ -144,19 +144,8 @@ static struct i2c_driver em3027_driver = { .id_table = em3027_id, }; -static int __init em3027_init(void) -{ - return i2c_add_driver(&em3027_driver); -} - -static void __exit em3027_exit(void) -{ - i2c_del_driver(&em3027_driver); -} +module_i2c_driver(em3027_driver); MODULE_AUTHOR("Mike Rapoport "); MODULE_DESCRIPTION("EM Microelectronic EM3027 RTC driver"); MODULE_LICENSE("GPL"); - -module_init(em3027_init); -module_exit(em3027_exit); diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c index 4cf2e70..86b6ecc 100644 --- a/drivers/rtc/rtc-fm3130.c +++ b/drivers/rtc/rtc-fm3130.c @@ -565,17 +565,7 @@ static struct i2c_driver fm3130_driver = { .id_table = fm3130_id, }; -static int __init fm3130_init(void) -{ - return i2c_add_driver(&fm3130_driver); -} -module_init(fm3130_init); - -static void __exit fm3130_exit(void) -{ - i2c_del_driver(&fm3130_driver); -} -module_exit(fm3130_exit); +module_i2c_driver(fm3130_driver); MODULE_DESCRIPTION("RTC driver for FM3130"); MODULE_AUTHOR("Sergey Lapin "); diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c index 6186833..1850104 100644 --- a/drivers/rtc/rtc-isl12022.c +++ b/drivers/rtc/rtc-isl12022.c @@ -309,18 +309,7 @@ static struct i2c_driver isl12022_driver = { .id_table = isl12022_id, }; -static int __init isl12022_init(void) -{ - return i2c_add_driver(&isl12022_driver); -} - -static void __exit isl12022_exit(void) -{ - i2c_del_driver(&isl12022_driver); -} - -module_init(isl12022_init); -module_exit(isl12022_exit); +module_i2c_driver(isl12022_driver); MODULE_AUTHOR("roman.fietze@telemotive.de"); MODULE_DESCRIPTION("ISL 12022 RTC driver"); diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c index da8beb8..dd2aeee 100644 --- a/drivers/rtc/rtc-isl1208.c +++ b/drivers/rtc/rtc-isl1208.c @@ -710,22 +710,9 @@ static struct i2c_driver isl1208_driver = { .id_table = isl1208_id, }; -static int __init -isl1208_init(void) -{ - return i2c_add_driver(&isl1208_driver); -} - -static void __exit -isl1208_exit(void) -{ - i2c_del_driver(&isl1208_driver); -} +module_i2c_driver(isl1208_driver); MODULE_AUTHOR("Herbert Valerio Riedel "); MODULE_DESCRIPTION("Intersil ISL1208 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(isl1208_init); -module_exit(isl1208_exit); diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index 64aedd8..4e0f84a 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -900,20 +900,9 @@ static struct i2c_driver m41t80_driver = { .id_table = m41t80_id, }; -static int __init m41t80_rtc_init(void) -{ - return i2c_add_driver(&m41t80_driver); -} - -static void __exit m41t80_rtc_exit(void) -{ - i2c_del_driver(&m41t80_driver); -} +module_i2c_driver(m41t80_driver); MODULE_AUTHOR("Alexander Bigga "); MODULE_DESCRIPTION("ST Microelectronics M41T80 series RTC I2C Client Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(m41t80_rtc_init); -module_exit(m41t80_rtc_exit); diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c index 486142c..a00e332 100644 --- a/drivers/rtc/rtc-max6900.c +++ b/drivers/rtc/rtc-max6900.c @@ -261,20 +261,9 @@ static struct i2c_driver max6900_driver = { .id_table = max6900_id, }; -static int __init max6900_init(void) -{ - return i2c_add_driver(&max6900_driver); -} - -static void __exit max6900_exit(void) -{ - i2c_del_driver(&max6900_driver); -} +module_i2c_driver(max6900_driver); MODULE_DESCRIPTION("Maxim MAX6900 RTC driver"); MODULE_AUTHOR("Dale Farnsworth "); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(max6900_init); -module_exit(max6900_exit); diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c index 606fdfa..bc0677d 100644 --- a/drivers/rtc/rtc-pcf8563.c +++ b/drivers/rtc/rtc-pcf8563.c @@ -252,20 +252,9 @@ static struct i2c_driver pcf8563_driver = { .id_table = pcf8563_id, }; -static int __init pcf8563_init(void) -{ - return i2c_add_driver(&pcf8563_driver); -} - -static void __exit pcf8563_exit(void) -{ - i2c_del_driver(&pcf8563_driver); -} +module_i2c_driver(pcf8563_driver); MODULE_AUTHOR("Alessandro Zummo "); MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(pcf8563_init); -module_exit(pcf8563_exit); diff --git a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c index 2d201af..019ff35 100644 --- a/drivers/rtc/rtc-pcf8583.c +++ b/drivers/rtc/rtc-pcf8583.c @@ -320,18 +320,7 @@ static struct i2c_driver pcf8583_driver = { .id_table = pcf8583_id, }; -static __init int pcf8583_init(void) -{ - return i2c_add_driver(&pcf8583_driver); -} - -static __exit void pcf8583_exit(void) -{ - i2c_del_driver(&pcf8583_driver); -} - -module_init(pcf8583_init); -module_exit(pcf8583_exit); +module_i2c_driver(pcf8583_driver); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("PCF8583 I2C RTC driver"); diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c index d29f543..fb4842c 100644 --- a/drivers/rtc/rtc-rs5c372.c +++ b/drivers/rtc/rtc-rs5c372.c @@ -689,18 +689,7 @@ static struct i2c_driver rs5c372_driver = { .id_table = rs5c372_id, }; -static __init int rs5c372_init(void) -{ - return i2c_add_driver(&rs5c372_driver); -} - -static __exit void rs5c372_exit(void) -{ - i2c_del_driver(&rs5c372_driver); -} - -module_init(rs5c372_init); -module_exit(rs5c372_exit); +module_i2c_driver(rs5c372_driver); MODULE_AUTHOR( "Pavel Mironchik , " diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c index ea09ff2..0fbe57b 100644 --- a/drivers/rtc/rtc-rv3029c2.c +++ b/drivers/rtc/rtc-rv3029c2.c @@ -436,18 +436,7 @@ static struct i2c_driver rv3029c2_driver = { .id_table = rv3029c2_id, }; -static int __init rv3029c2_init(void) -{ - return i2c_add_driver(&rv3029c2_driver); -} - -static void __exit rv3029c2_exit(void) -{ - i2c_del_driver(&rv3029c2_driver); -} - -module_init(rv3029c2_init); -module_exit(rv3029c2_exit); +module_i2c_driver(rv3029c2_driver); MODULE_AUTHOR("Gregory Hermant "); MODULE_DESCRIPTION("Micro Crystal RV3029C2 RTC driver"); diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c index fde172f..0de902d 100644 --- a/drivers/rtc/rtc-rx8025.c +++ b/drivers/rtc/rtc-rx8025.c @@ -644,19 +644,8 @@ static struct i2c_driver rx8025_driver = { .id_table = rx8025_id, }; -static int __init rx8025_init(void) -{ - return i2c_add_driver(&rx8025_driver); -} - -static void __exit rx8025_exit(void) -{ - i2c_del_driver(&rx8025_driver); -} +module_i2c_driver(rx8025_driver); MODULE_AUTHOR("Wolfgang Grandegger "); MODULE_DESCRIPTION("RX-8025 SA/NB RTC driver"); MODULE_LICENSE("GPL"); - -module_init(rx8025_init); -module_exit(rx8025_exit); diff --git a/drivers/rtc/rtc-rx8581.c b/drivers/rtc/rtc-rx8581.c index 600b890..d848251 100644 --- a/drivers/rtc/rtc-rx8581.c +++ b/drivers/rtc/rtc-rx8581.c @@ -276,20 +276,9 @@ static struct i2c_driver rx8581_driver = { .id_table = rx8581_id, }; -static int __init rx8581_init(void) -{ - return i2c_add_driver(&rx8581_driver); -} - -static void __exit rx8581_exit(void) -{ - i2c_del_driver(&rx8581_driver); -} +module_i2c_driver(rx8581_driver); MODULE_AUTHOR("Martyn Welch "); MODULE_DESCRIPTION("Epson RX-8581 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(rx8581_init); -module_exit(rx8581_exit); diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c index f789e00..c9562ce 100644 --- a/drivers/rtc/rtc-s35390a.c +++ b/drivers/rtc/rtc-s35390a.c @@ -304,19 +304,8 @@ static struct i2c_driver s35390a_driver = { .id_table = s35390a_id, }; -static int __init s35390a_rtc_init(void) -{ - return i2c_add_driver(&s35390a_driver); -} - -static void __exit s35390a_rtc_exit(void) -{ - i2c_del_driver(&s35390a_driver); -} +module_i2c_driver(s35390a_driver); MODULE_AUTHOR("Byron Bradley "); MODULE_DESCRIPTION("S35390A RTC driver"); MODULE_LICENSE("GPL"); - -module_init(s35390a_rtc_init); -module_exit(s35390a_rtc_exit); diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c index 8c051d3..403b3d4 100644 --- a/drivers/rtc/rtc-x1205.c +++ b/drivers/rtc/rtc-x1205.c @@ -623,15 +623,7 @@ static struct i2c_driver x1205_driver = { .id_table = x1205_id, }; -static int __init x1205_init(void) -{ - return i2c_add_driver(&x1205_driver); -} - -static void __exit x1205_exit(void) -{ - i2c_del_driver(&x1205_driver); -} +module_i2c_driver(x1205_driver); MODULE_AUTHOR( "Karen Spearel , " @@ -639,6 +631,3 @@ MODULE_AUTHOR( MODULE_DESCRIPTION("Xicor/Intersil X1205 RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(x1205_init); -module_exit(x1205_exit); -- cgit v0.10.2 From b4f0b880c8d7eb225b79dec663780b4dcdea7fbc Mon Sep 17 00:00:00 2001 From: zhao zhang Date: Fri, 23 Mar 2012 15:02:32 -0700 Subject: MIPS: add RTC support for loongson1B Add RTC support(TOY counter0) for loongson1B SOC Signed-off-by: zhao zhang Cc: Alessandro Zummo Cc: Ralf Baechle Acked-by: Linus Walleij Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 3a125b8..850febc 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1070,4 +1070,14 @@ config RTC_DRV_PUV3 This drive can also be built as a module. If so, the module will be called rtc-puv3. +config RTC_DRV_LOONGSON1 + tristate "loongson1 RTC support" + depends on MACH_LOONGSON1 + help + This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year + counter) to be used as a RTC. + + This driver can also be built as a module. If so, the module + will be called rtc-ls1x. + endif # RTC_CLASS diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 6e69823..6c9387a 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -53,6 +53,7 @@ obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o obj-$(CONFIG_RTC_DRV_LPC32XX) += rtc-lpc32xx.o +obj-$(CONFIG_RTC_DRV_LOONGSON1) += rtc-ls1x.o obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o obj-$(CONFIG_RTC_DRV_M41T93) += rtc-m41t93.o obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o diff --git a/drivers/rtc/rtc-ls1x.c b/drivers/rtc/rtc-ls1x.c new file mode 100644 index 0000000..07e81c5 --- /dev/null +++ b/drivers/rtc/rtc-ls1x.c @@ -0,0 +1,210 @@ +/* + * Copyright (c) 2011 Zhao Zhang + * + * Derived from driver/rtc/rtc-au1xxx.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define LS1X_RTC_REG_OFFSET (LS1X_RTC_BASE + 0x20) +#define LS1X_RTC_REGS(x) \ + ((void __iomem *)KSEG1ADDR(LS1X_RTC_REG_OFFSET + (x))) + +/*RTC programmable counters 0 and 1*/ +#define SYS_COUNTER_CNTRL (LS1X_RTC_REGS(0x20)) +#define SYS_CNTRL_ERS (1 << 23) +#define SYS_CNTRL_RTS (1 << 20) +#define SYS_CNTRL_RM2 (1 << 19) +#define SYS_CNTRL_RM1 (1 << 18) +#define SYS_CNTRL_RM0 (1 << 17) +#define SYS_CNTRL_RS (1 << 16) +#define SYS_CNTRL_BP (1 << 14) +#define SYS_CNTRL_REN (1 << 13) +#define SYS_CNTRL_BRT (1 << 12) +#define SYS_CNTRL_TEN (1 << 11) +#define SYS_CNTRL_BTT (1 << 10) +#define SYS_CNTRL_E0 (1 << 8) +#define SYS_CNTRL_ETS (1 << 7) +#define SYS_CNTRL_32S (1 << 5) +#define SYS_CNTRL_TTS (1 << 4) +#define SYS_CNTRL_TM2 (1 << 3) +#define SYS_CNTRL_TM1 (1 << 2) +#define SYS_CNTRL_TM0 (1 << 1) +#define SYS_CNTRL_TS (1 << 0) + +/* Programmable Counter 0 Registers */ +#define SYS_TOYTRIM (LS1X_RTC_REGS(0)) +#define SYS_TOYWRITE0 (LS1X_RTC_REGS(4)) +#define SYS_TOYWRITE1 (LS1X_RTC_REGS(8)) +#define SYS_TOYREAD0 (LS1X_RTC_REGS(0xC)) +#define SYS_TOYREAD1 (LS1X_RTC_REGS(0x10)) +#define SYS_TOYMATCH0 (LS1X_RTC_REGS(0x14)) +#define SYS_TOYMATCH1 (LS1X_RTC_REGS(0x18)) +#define SYS_TOYMATCH2 (LS1X_RTC_REGS(0x1C)) + +/* Programmable Counter 1 Registers */ +#define SYS_RTCTRIM (LS1X_RTC_REGS(0x40)) +#define SYS_RTCWRITE0 (LS1X_RTC_REGS(0x44)) +#define SYS_RTCREAD0 (LS1X_RTC_REGS(0x48)) +#define SYS_RTCMATCH0 (LS1X_RTC_REGS(0x4C)) +#define SYS_RTCMATCH1 (LS1X_RTC_REGS(0x50)) +#define SYS_RTCMATCH2 (LS1X_RTC_REGS(0x54)) + +#define LS1X_SEC_OFFSET (4) +#define LS1X_MIN_OFFSET (10) +#define LS1X_HOUR_OFFSET (16) +#define LS1X_DAY_OFFSET (21) +#define LS1X_MONTH_OFFSET (26) + + +#define LS1X_SEC_MASK (0x3f) +#define LS1X_MIN_MASK (0x3f) +#define LS1X_HOUR_MASK (0x1f) +#define LS1X_DAY_MASK (0x1f) +#define LS1X_MONTH_MASK (0x3f) +#define LS1X_YEAR_MASK (0xffffffff) + +#define ls1x_get_sec(t) (((t) >> LS1X_SEC_OFFSET) & LS1X_SEC_MASK) +#define ls1x_get_min(t) (((t) >> LS1X_MIN_OFFSET) & LS1X_MIN_MASK) +#define ls1x_get_hour(t) (((t) >> LS1X_HOUR_OFFSET) & LS1X_HOUR_MASK) +#define ls1x_get_day(t) (((t) >> LS1X_DAY_OFFSET) & LS1X_DAY_MASK) +#define ls1x_get_month(t) (((t) >> LS1X_MONTH_OFFSET) & LS1X_MONTH_MASK) + +#define RTC_CNTR_OK (SYS_CNTRL_E0 | SYS_CNTRL_32S) + +static int ls1x_rtc_read_time(struct device *dev, struct rtc_time *rtm) +{ + unsigned long v, t; + + v = readl(SYS_TOYREAD0); + t = readl(SYS_TOYREAD1); + + memset(rtm, 0, sizeof(struct rtc_time)); + t = mktime((t & LS1X_YEAR_MASK), ls1x_get_month(v), + ls1x_get_day(v), ls1x_get_hour(v), + ls1x_get_min(v), ls1x_get_sec(v)); + rtc_time_to_tm(t, rtm); + + return rtc_valid_tm(rtm); +} + +static int ls1x_rtc_set_time(struct device *dev, struct rtc_time *rtm) +{ + unsigned long v, t, c; + int ret = -ETIMEDOUT; + + v = ((rtm->tm_mon + 1) << LS1X_MONTH_OFFSET) + | (rtm->tm_mday << LS1X_DAY_OFFSET) + | (rtm->tm_hour << LS1X_HOUR_OFFSET) + | (rtm->tm_min << LS1X_MIN_OFFSET) + | (rtm->tm_sec << LS1X_SEC_OFFSET); + + writel(v, SYS_TOYWRITE0); + c = 0x10000; + /* add timeout check counter, for more safe */ + while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c) + usleep_range(1000, 3000); + + if (!c) { + dev_err(dev, "set time timeout!\n"); + goto err; + } + + t = rtm->tm_year + 1900; + writel(t, SYS_TOYWRITE1); + c = 0x10000; + while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c) + usleep_range(1000, 3000); + + if (!c) { + dev_err(dev, "set time timeout!\n"); + goto err; + } + return 0; +err: + return ret; +} + +static struct rtc_class_ops ls1x_rtc_ops = { + .read_time = ls1x_rtc_read_time, + .set_time = ls1x_rtc_set_time, +}; + +static int __devinit ls1x_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtcdev; + unsigned long v; + int ret; + + v = readl(SYS_COUNTER_CNTRL); + if (!(v & RTC_CNTR_OK)) { + dev_err(&pdev->dev, "rtc counters not working\n"); + ret = -ENODEV; + goto err; + } + ret = -ETIMEDOUT; + /* set to 1 HZ if needed */ + if (readl(SYS_TOYTRIM) != 32767) { + v = 0x100000; + while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS) && --v) + usleep_range(1000, 3000); + + if (!v) { + dev_err(&pdev->dev, "time out\n"); + goto err; + } + writel(32767, SYS_TOYTRIM); + } + /* this loop coundn't be endless */ + while (readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS) + usleep_range(1000, 3000); + + rtcdev = rtc_device_register("ls1x-rtc", &pdev->dev, + &ls1x_rtc_ops , THIS_MODULE); + if (IS_ERR(rtcdev)) { + ret = PTR_ERR(rtcdev); + goto err; + } + + platform_set_drvdata(pdev, rtcdev); + return 0; +err: + return ret; +} + +static int __devexit ls1x_rtc_remove(struct platform_device *pdev) +{ + struct rtc_device *rtcdev = platform_get_drvdata(pdev); + + rtc_device_unregister(rtcdev); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver ls1x_rtc_driver = { + .driver = { + .name = "ls1x-rtc", + .owner = THIS_MODULE, + }, + .remove = __devexit_p(ls1x_rtc_remove), + .probe = ls1x_rtc_probe, +}; + +module_platform_driver(ls1x_rtc_driver); + +MODULE_AUTHOR("zhao zhang "); +MODULE_LICENSE("GPL"); -- cgit v0.10.2 From ce9f650636d310e4c8febc821b0038e9918a12db Mon Sep 17 00:00:00 2001 From: Venu Byravarasu Date: Fri, 23 Mar 2012 15:02:32 -0700 Subject: drivers/rtc/rtc-twl.c: optimize IRQ bit access As the TWL RTC driver has a cached copy of enabled RTC interrupt bits in variable rtc_irq_bits, that can be checked before really setting or masking any of the interrupt bits. Signed-off-by: Venu Byravarasu Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index d43b4f6..18dff52 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -176,6 +176,10 @@ static int set_rtc_irq_bit(unsigned char bit) unsigned char val; int ret; + /* if the bit is set, return from here */ + if (rtc_irq_bits & bit) + return 0; + val = rtc_irq_bits | bit; val &= ~BIT_RTC_INTERRUPTS_REG_EVERY_M; ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); @@ -193,6 +197,10 @@ static int mask_rtc_irq_bit(unsigned char bit) unsigned char val; int ret; + /* if the bit is clear, return from here */ + if (!(rtc_irq_bits & bit)) + return 0; + val = rtc_irq_bits & ~bit; ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); if (ret == 0) -- cgit v0.10.2 From f7439bcb74aca4234fedc336a21e169e6e33bb2e Mon Sep 17 00:00:00 2001 From: Venu Byravarasu Date: Fri, 23 Mar 2012 15:02:33 -0700 Subject: drivers/rtc/rtc-twl.c: enable RTC irrespective of its prior state As part of probe, before enabling RTC, RTC_CTRL register is read to check if it is already running. If RTC is used by kernel alone, then this read is not required. Even if RTC was enabled already by boot loader, setting STOP_RTC bit again should not harm. Hence removed unwanted read operation. Signed-off-by: Venu Byravarasu Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index 18dff52..18e4c01 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -457,19 +457,11 @@ static int __devinit twl_rtc_probe(struct platform_device *pdev) REG_INT_MSK_STS_A); } - /* Check RTC module status, Enable if it is off */ - ret = twl_rtc_read_u8(&rd_reg, REG_RTC_CTRL_REG); + dev_info(&pdev->dev, "Enabling TWL-RTC\n"); + ret = twl_rtc_write_u8(BIT_RTC_CTRL_REG_STOP_RTC_M, REG_RTC_CTRL_REG); if (ret < 0) goto out1; - if (!(rd_reg & BIT_RTC_CTRL_REG_STOP_RTC_M)) { - dev_info(&pdev->dev, "Enabling TWL-RTC.\n"); - rd_reg = BIT_RTC_CTRL_REG_STOP_RTC_M; - ret = twl_rtc_write_u8(rd_reg, REG_RTC_CTRL_REG); - if (ret < 0) - goto out1; - } - /* init cached IRQ enable bits */ ret = twl_rtc_read_u8(&rtc_irq_bits, REG_RTC_INTERRUPTS_REG); if (ret < 0) -- cgit v0.10.2 From 94a339d016e26f96a1bd9e08306c857825c91a66 Mon Sep 17 00:00:00 2001 From: Venu Byravarasu Date: Fri, 23 Mar 2012 15:02:33 -0700 Subject: drivers/rtc/rtc-twl.c: simplify RTC interrupt clearing For clearing RTC interrupt, programming ALARM bit only is sufficient, as all other bits are any way not affected by writing 0 to them. Hence removed unwanted OR operation. Signed-off-by: Venu Byravarasu Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index 18e4c01..cedb6c1 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -384,7 +384,7 @@ static irqreturn_t twl_rtc_interrupt(int irq, void *rtc) else events |= RTC_IRQF | RTC_UF; - res = twl_rtc_write_u8(rd_reg | BIT_RTC_STATUS_REG_ALARM_M, + res = twl_rtc_write_u8(BIT_RTC_STATUS_REG_ALARM_M, REG_RTC_STATUS_REG); if (res) goto out; -- cgit v0.10.2 From 2778ebcc09c002cccdbd6b5509b5cbf4161b486d Mon Sep 17 00:00:00 2001 From: Venu Byravarasu Date: Fri, 23 Mar 2012 15:02:34 -0700 Subject: drivers/rtc/rtc-twl.c: return correct RTC event from ISR Following changes are made as part of this change: 1. As TWL RTC supports periodic interrupt, the correct event should be RTC_PF instead of RTC_UF. 2. No need to initialize variable "events" to 0 & then OR it with the event values. Hence fixing it. Signed-off-by: Venu Byravarasu Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index cedb6c1..4c2c6df 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -365,7 +365,7 @@ out: static irqreturn_t twl_rtc_interrupt(int irq, void *rtc) { - unsigned long events = 0; + unsigned long events; int ret = IRQ_NONE; int res; u8 rd_reg; @@ -380,9 +380,9 @@ static irqreturn_t twl_rtc_interrupt(int irq, void *rtc) * by reading RTS_INTERRUPTS_REGISTER[IT_TIMER,IT_ALARM] */ if (rd_reg & BIT_RTC_STATUS_REG_ALARM_M) - events |= RTC_IRQF | RTC_AF; + events = RTC_IRQF | RTC_AF; else - events |= RTC_IRQF | RTC_UF; + events = RTC_IRQF | RTC_PF; res = twl_rtc_write_u8(BIT_RTC_STATUS_REG_ALARM_M, REG_RTC_STATUS_REG); -- cgit v0.10.2 From 2f6e5f9458646263d3d9ffadd5e11e3d8d15a7d0 Mon Sep 17 00:00:00 2001 From: Yong Zhang Date: Fri, 23 Mar 2012 15:02:34 -0700 Subject: drivers/rtc: remove IRQF_DISABLED Since commit e58aa3d2d0cc ("genirq: run irq handlers with interrupts disabled") we run all interrupt handlers with interrupts disabled and we even check and yell when an interrupt handler returns with interrupts enabled - see commit b738a50a2026 ("genirq: warn when handler enables interrupts"). So now this flag is a NOOP and can be removed. Signed-off-by: Yong Zhang Acked-by: Linus Walleij Acked-by: Wan ZongShun Cc: Alessandro Zummo Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c index ee3c122..274a0aa 100644 --- a/drivers/rtc/rtc-at91sam9.c +++ b/drivers/rtc/rtc-at91sam9.c @@ -335,7 +335,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev) /* register irq handler after we know what name we'll use */ ret = request_irq(AT91_ID_SYS, at91_rtc_interrupt, - IRQF_DISABLED | IRQF_SHARED, + IRQF_SHARED, dev_name(&rtc->rtcdev->dev), rtc); if (ret) { dev_dbg(&pdev->dev, "can't share IRQ %d?\n", AT91_ID_SYS); diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index d7782aa..7d5f56e 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -714,7 +714,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) rtc_cmos_int_handler = cmos_interrupt; retval = request_irq(rtc_irq, rtc_cmos_int_handler, - IRQF_DISABLED, dev_name(&cmos_rtc.rtc->dev), + 0, dev_name(&cmos_rtc.rtc->dev), cmos_rtc.rtc); if (retval < 0) { dev_dbg(dev, "IRQ %d is already in use\n", rtc_irq); diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c index 80f9c88..a5b8a0c 100644 --- a/drivers/rtc/rtc-coh901331.c +++ b/drivers/rtc/rtc-coh901331.c @@ -199,7 +199,7 @@ static int __init coh901331_probe(struct platform_device *pdev) } rtap->irq = platform_get_irq(pdev, 0); - if (request_irq(rtap->irq, coh901331_interrupt, IRQF_DISABLED, + if (request_irq(rtap->irq, coh901331_interrupt, 0, "RTC COH 901 331 Alarm", rtap)) { ret = -EIO; goto out_no_irq; diff --git a/drivers/rtc/rtc-davinci.c b/drivers/rtc/rtc-davinci.c index 755e1fe..14c2109 100644 --- a/drivers/rtc/rtc-davinci.c +++ b/drivers/rtc/rtc-davinci.c @@ -542,7 +542,7 @@ static int __init davinci_rtc_probe(struct platform_device *pdev) rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CCTRL); ret = request_irq(davinci_rtc->irq, davinci_rtc_interrupt, - IRQF_DISABLED, "davinci_rtc", davinci_rtc); + 0, "davinci_rtc", davinci_rtc); if (ret < 0) { dev_err(dev, "unable to register davinci RTC interrupt\n"); goto fail4; diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c index 761f36b..1f675f5 100644 --- a/drivers/rtc/rtc-ds1511.c +++ b/drivers/rtc/rtc-ds1511.c @@ -532,7 +532,7 @@ ds1511_rtc_probe(struct platform_device *pdev) if (pdata->irq > 0) { rtc_read(RTC_CMD1); if (devm_request_irq(&pdev->dev, pdata->irq, ds1511_interrupt, - IRQF_DISABLED | IRQF_SHARED, pdev->name, pdev) < 0) { + IRQF_SHARED, pdev->name, pdev) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = 0; diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c index 6f0a1b5..6ccedbb 100644 --- a/drivers/rtc/rtc-ds1553.c +++ b/drivers/rtc/rtc-ds1553.c @@ -320,7 +320,7 @@ static int __devinit ds1553_rtc_probe(struct platform_device *pdev) writeb(0, ioaddr + RTC_INTERRUPTS); if (devm_request_irq(&pdev->dev, pdata->irq, ds1553_rtc_interrupt, - IRQF_DISABLED, pdev->name, pdev) < 0) { + 0, pdev->name, pdev) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = 0; } diff --git a/drivers/rtc/rtc-lpc32xx.c b/drivers/rtc/rtc-lpc32xx.c index ecc1713..63c7218 100644 --- a/drivers/rtc/rtc-lpc32xx.c +++ b/drivers/rtc/rtc-lpc32xx.c @@ -287,7 +287,7 @@ static int __devinit lpc32xx_rtc_probe(struct platform_device *pdev) if (rtc->irq >= 0) { if (devm_request_irq(&pdev->dev, rtc->irq, lpc32xx_rtc_alarm_interrupt, - IRQF_DISABLED, pdev->name, rtc) < 0) { + 0, pdev->name, rtc) < 0) { dev_warn(&pdev->dev, "Can't request interrupt.\n"); rtc->irq = -1; } else { diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c index 9d3cacc..e954a75 100644 --- a/drivers/rtc/rtc-mpc5121.c +++ b/drivers/rtc/rtc-mpc5121.c @@ -327,7 +327,7 @@ static int __devinit mpc5121_rtc_probe(struct platform_device *op) dev_set_drvdata(&op->dev, rtc); rtc->irq = irq_of_parse_and_map(op->dev.of_node, 1); - err = request_irq(rtc->irq, mpc5121_rtc_handler, IRQF_DISABLED, + err = request_irq(rtc->irq, mpc5121_rtc_handler, 0, "mpc5121-rtc", &op->dev); if (err) { dev_err(&op->dev, "%s: could not request irq: %i\n", @@ -337,7 +337,7 @@ static int __devinit mpc5121_rtc_probe(struct platform_device *op) rtc->irq_periodic = irq_of_parse_and_map(op->dev.of_node, 0); err = request_irq(rtc->irq_periodic, mpc5121_rtc_handler_upd, - IRQF_DISABLED, "mpc5121-rtc_upd", &op->dev); + 0, "mpc5121-rtc_upd", &op->dev); if (err) { dev_err(&op->dev, "%s: could not request irq: %i\n", __func__, rtc->irq_periodic); diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c index 6cd6c72..f51719b 100644 --- a/drivers/rtc/rtc-mrst.c +++ b/drivers/rtc/rtc-mrst.c @@ -366,7 +366,7 @@ vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq) if (rtc_irq) { retval = request_irq(rtc_irq, mrst_rtc_irq, - IRQF_DISABLED, dev_name(&mrst_rtc.rtc->dev), + 0, dev_name(&mrst_rtc.rtc->dev), mrst_rtc.rtc); if (retval < 0) { dev_dbg(dev, "IRQ %d is already in use, err %d\n", diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c index 768e2ed..1300962 100644 --- a/drivers/rtc/rtc-mv.c +++ b/drivers/rtc/rtc-mv.c @@ -273,7 +273,7 @@ static int __devinit mv_rtc_probe(struct platform_device *pdev) if (pdata->irq >= 0) { writel(0, pdata->ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS); if (devm_request_irq(&pdev->dev, pdata->irq, mv_rtc_interrupt, - IRQF_DISABLED | IRQF_SHARED, + IRQF_SHARED, pdev->name, pdata) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = -1; diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c index 781068d..b7901098 100644 --- a/drivers/rtc/rtc-nuc900.c +++ b/drivers/rtc/rtc-nuc900.c @@ -269,7 +269,7 @@ static int __devinit nuc900_rtc_probe(struct platform_device *pdev) nuc900_rtc->irq_num = platform_get_irq(pdev, 0); if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt, - IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) { + 0, "nuc900rtc", nuc900_rtc)) { dev_err(&pdev->dev, "NUC900 RTC request irq failed\n"); err = -EBUSY; goto fail4; diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c index 7789002..0b614e3 100644 --- a/drivers/rtc/rtc-omap.c +++ b/drivers/rtc/rtc-omap.c @@ -348,14 +348,14 @@ static int __init omap_rtc_probe(struct platform_device *pdev) rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG); /* handle periodic and alarm irqs */ - if (request_irq(omap_rtc_timer, rtc_irq, IRQF_DISABLED, + if (request_irq(omap_rtc_timer, rtc_irq, 0, dev_name(&rtc->dev), rtc)) { pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n", pdev->name, omap_rtc_timer); goto fail1; } if ((omap_rtc_timer != omap_rtc_alarm) && - (request_irq(omap_rtc_alarm, rtc_irq, IRQF_DISABLED, + (request_irq(omap_rtc_alarm, rtc_irq, 0, dev_name(&rtc->dev), rtc))) { pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n", pdev->name, omap_rtc_alarm); diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c index 02111fe..a4a1e534 100644 --- a/drivers/rtc/rtc-pl030.c +++ b/drivers/rtc/rtc-pl030.c @@ -123,7 +123,7 @@ static int pl030_probe(struct amba_device *dev, const struct amba_id *id) amba_set_drvdata(dev, rtc); - ret = request_irq(dev->irq[0], pl030_interrupt, IRQF_DISABLED, + ret = request_irq(dev->irq[0], pl030_interrupt, 0, "rtc-pl030", rtc); if (ret) goto err_irq; diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index a952c8d..3a470e2 100644 --- a/drivers/rtc/rtc-pl031.c +++ b/drivers/rtc/rtc-pl031.c @@ -352,7 +352,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id) } if (request_irq(adev->irq[0], pl031_interrupt, - IRQF_DISABLED, "rtc-pl031", ldata)) { + 0, "rtc-pl031", ldata)) { ret = -EIO; goto out_no_irq; } diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c index fc9f499..0075c8f 100644 --- a/drivers/rtc/rtc-pxa.c +++ b/drivers/rtc/rtc-pxa.c @@ -174,14 +174,14 @@ static int pxa_rtc_open(struct device *dev) struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); int ret; - ret = request_irq(pxa_rtc->irq_1Hz, pxa_rtc_irq, IRQF_DISABLED, + ret = request_irq(pxa_rtc->irq_1Hz, pxa_rtc_irq, 0, "rtc 1Hz", dev); if (ret < 0) { dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->irq_1Hz, ret); goto err_irq_1Hz; } - ret = request_irq(pxa_rtc->irq_Alrm, pxa_rtc_irq, IRQF_DISABLED, + ret = request_irq(pxa_rtc->irq_Alrm, pxa_rtc_irq, 0, "rtc Alrm", dev); if (ret < 0) { dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->irq_Alrm, diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index aef40bd..c543f6f 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -543,14 +543,14 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) s3c_rtc_setfreq(&pdev->dev, 1); ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq, - IRQF_DISABLED, "s3c2410-rtc alarm", rtc); + 0, "s3c2410-rtc alarm", rtc); if (ret) { dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret); goto err_alarm_irq; } ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq, - IRQF_DISABLED, "s3c2410-rtc tick", rtc); + 0, "s3c2410-rtc tick", rtc); if (ret) { dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret); free_irq(s3c_rtc_alarmno, rtc); diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c index cb9a585..fb758db 100644 --- a/drivers/rtc/rtc-sa1100.c +++ b/drivers/rtc/rtc-sa1100.c @@ -160,14 +160,13 @@ static int sa1100_rtc_open(struct device *dev) struct platform_device *plat_dev = to_platform_device(dev); struct rtc_device *rtc = platform_get_drvdata(plat_dev); - ret = request_irq(IRQ_RTC1Hz, sa1100_rtc_interrupt, IRQF_DISABLED, - "rtc 1Hz", dev); + ret = request_irq(IRQ_RTC1Hz, sa1100_rtc_interrupt, 0, "rtc 1Hz", dev); if (ret) { dev_err(dev, "IRQ %d already in use.\n", IRQ_RTC1Hz); goto fail_ui; } - ret = request_irq(IRQ_RTCAlrm, sa1100_rtc_interrupt, IRQF_DISABLED, - "rtc Alrm", dev); + ret = request_irq(IRQ_RTCAlrm, sa1100_rtc_interrupt, 0, + "rtc Alrm", dev); if (ret) { dev_err(dev, "IRQ %d already in use.\n", IRQ_RTCAlrm); goto fail_ai; diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c index 6ac55fd..e55a763 100644 --- a/drivers/rtc/rtc-sh.c +++ b/drivers/rtc/rtc-sh.c @@ -666,7 +666,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev) if (rtc->carry_irq <= 0) { /* register shared periodic/carry/alarm irq */ ret = request_irq(rtc->periodic_irq, sh_rtc_shared, - IRQF_DISABLED, "sh-rtc", rtc); + 0, "sh-rtc", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request IRQ failed with %d, IRQ %d\n", ret, @@ -676,7 +676,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev) } else { /* register periodic/carry/alarm irqs */ ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, - IRQF_DISABLED, "sh-rtc period", rtc); + 0, "sh-rtc period", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request period IRQ failed with %d, IRQ %d\n", @@ -685,7 +685,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev) } ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, - IRQF_DISABLED, "sh-rtc carry", rtc); + 0, "sh-rtc carry", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request carry IRQ failed with %d, IRQ %d\n", @@ -695,7 +695,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev) } ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, - IRQF_DISABLED, "sh-rtc alarm", rtc); + 0, "sh-rtc alarm", rtc); if (unlikely(ret)) { dev_err(&pdev->dev, "request alarm IRQ failed with %d, IRQ %d\n", diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c index 7621116..279f5cf 100644 --- a/drivers/rtc/rtc-stk17ta8.c +++ b/drivers/rtc/rtc-stk17ta8.c @@ -329,7 +329,7 @@ static int __devinit stk17ta8_rtc_probe(struct platform_device *pdev) writeb(0, ioaddr + RTC_INTERRUPTS); if (devm_request_irq(&pdev->dev, pdata->irq, stk17ta8_rtc_interrupt, - IRQF_DISABLED | IRQF_SHARED, + IRQF_SHARED, pdev->name, pdev) < 0) { dev_warn(&pdev->dev, "interrupt not available.\n"); pdata->irq = 0; diff --git a/drivers/rtc/rtc-tx4939.c b/drivers/rtc/rtc-tx4939.c index aac0ffe..a12bfac 100644 --- a/drivers/rtc/rtc-tx4939.c +++ b/drivers/rtc/rtc-tx4939.c @@ -266,7 +266,7 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev) spin_lock_init(&pdata->lock); tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP); if (devm_request_irq(&pdev->dev, irq, tx4939_rtc_interrupt, - IRQF_DISABLED, pdev->name, &pdev->dev) < 0) + 0, pdev->name, &pdev->dev) < 0) return -EBUSY; rtc = rtc_device_register(pdev->name, &pdev->dev, &tx4939_rtc_ops, THIS_MODULE); diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c index fcbfdda..5f60a7c 100644 --- a/drivers/rtc/rtc-vr41xx.c +++ b/drivers/rtc/rtc-vr41xx.c @@ -333,7 +333,7 @@ static int __devinit rtc_probe(struct platform_device *pdev) goto err_device_unregister; } - retval = request_irq(aie_irq, elapsedtime_interrupt, IRQF_DISABLED, + retval = request_irq(aie_irq, elapsedtime_interrupt, 0, "elapsed_time", pdev); if (retval < 0) goto err_device_unregister; @@ -342,7 +342,7 @@ static int __devinit rtc_probe(struct platform_device *pdev) if (pie_irq <= 0) goto err_free_irq; - retval = request_irq(pie_irq, rtclong1_interrupt, IRQF_DISABLED, + retval = request_irq(pie_irq, rtclong1_interrupt, 0, "rtclong1", pdev); if (retval < 0) goto err_free_irq; -- cgit v0.10.2 From aa19689bfaaa26f2d85588a8774e194de5e7be54 Mon Sep 17 00:00:00 2001 From: Navin P Date: Fri, 23 Mar 2012 15:02:34 -0700 Subject: drivers/rtc/rtc-pm8xxx.c: make pm8xxx_rtc_pm_ops static Signed-off-by: Navin P Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c index 9f1d6bc..d00bd24 100644 --- a/drivers/rtc/rtc-pm8xxx.c +++ b/drivers/rtc/rtc-pm8xxx.c @@ -520,7 +520,7 @@ static int pm8xxx_rtc_suspend(struct device *dev) } #endif -SIMPLE_DEV_PM_OPS(pm8xxx_rtc_pm_ops, pm8xxx_rtc_suspend, pm8xxx_rtc_resume); +static SIMPLE_DEV_PM_OPS(pm8xxx_rtc_pm_ops, pm8xxx_rtc_suspend, pm8xxx_rtc_resume); static struct platform_driver pm8xxx_rtc_driver = { .probe = pm8xxx_rtc_probe, -- cgit v0.10.2 From 0cf30bdd919685b201f715ea347dd96d590942e8 Mon Sep 17 00:00:00 2001 From: Kevin Liu Date: Fri, 23 Mar 2012 15:02:35 -0700 Subject: drivers/rtc/rtc-max8925.c: fix max8925_rtc_read_alarm() return value error max8925_rtc_read_alarm should always return 0 with success Signed-off-by: Kevin Liu Signed-off-by: Haojian Zhuang Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c index 2d71943..ff6b9a2 100644 --- a/drivers/rtc/rtc-max8925.c +++ b/drivers/rtc/rtc-max8925.c @@ -204,6 +204,7 @@ static int max8925_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) alrm->pending = 1; else alrm->pending = 0; + return 0; out: return ret; } -- cgit v0.10.2 From fad0738dcf6feccf601f5a24b8ccd3b26894b337 Mon Sep 17 00:00:00 2001 From: Kevin Liu Date: Fri, 23 Mar 2012 15:02:36 -0700 Subject: drivers/rtc/rtc-max8925.c: fix alarm->enabled mistake in max8925_rtc_read_alarm/max8925_rtc_set_alarm max8925_rtc_read_alarm() should set alrm->enabled based on both ALARM_IRQ_MASK and ALARM_CTRL setting. max8925_rtc_set_alarm() should enable/disable alarm according to ALARM_CTRL reg setting. Signed-off-by: Kevin Liu Signed-off-by: Haojian Zhuang Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c index ff6b9a2..1459055 100644 --- a/drivers/rtc/rtc-max8925.c +++ b/drivers/rtc/rtc-max8925.c @@ -193,10 +193,17 @@ static int max8925_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) ret = max8925_reg_read(info->rtc, MAX8925_RTC_IRQ_MASK); if (ret < 0) goto out; - if ((ret & ALARM0_IRQ) == 0) - alrm->enabled = 1; - else + if (ret & ALARM0_IRQ) { alrm->enabled = 0; + } else { + ret = max8925_reg_read(info->rtc, MAX8925_ALARM0_CNTL); + if (ret < 0) + goto out; + if (!ret) + alrm->enabled = 0; + else + alrm->enabled = 1; + } ret = max8925_reg_read(info->rtc, MAX8925_RTC_STATUS); if (ret < 0) goto out; @@ -221,8 +228,11 @@ static int max8925_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) ret = max8925_bulk_write(info->rtc, MAX8925_ALARM0_SEC, TIME_NUM, buf); if (ret < 0) goto out; - /* only enable alarm on year/month/day/hour/min/sec */ - ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x77); + if (alrm->enabled) + /* only enable alarm on year/month/day/hour/min/sec */ + ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x77); + else + ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x0); if (ret < 0) goto out; out: -- cgit v0.10.2 From fef931ff98fe78bea804d9b4c49d410a7a97988c Mon Sep 17 00:00:00 2001 From: Ashish Jangam Date: Fri, 23 Mar 2012 15:02:36 -0700 Subject: rtc: driver for DA9052/53 PMIC v1 RTC Driver for Dialog Semiconductor DA9052/53 PMICs. This patch is functionally tested on Samsung SMDKV6410. [akpm@linux-foundation.org: clean up file header layout, remove unneeded initialisation of local arrays] Signed-off-by: David Dajun Chen Signed-off-by: Ashish Jangam Cc: Paul Gortmaker Cc: David Dajun Chen Cc: Samuel Ortiz Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 850febc..4f9fb25 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -554,6 +554,13 @@ config RTC_DRV_DS1742 This driver can also be built as a module. If so, the module will be called rtc-ds1742. +config RTC_DRV_DA9052 + tristate "Dialog DA9052/DA9053 RTC" + depends on PMIC_DA9052 + help + Say y here to support the RTC driver for Dialog Semiconductor + DA9052-BC and DA9053-AA/Bx PMICs. + config RTC_DRV_EFI tristate "EFI RTC" depends on IA64 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 6c9387a..727ae77 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_RTC_DRV_BQ32K) += rtc-bq32k.o obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o +obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o obj-$(CONFIG_RTC_DRV_DAVINCI) += rtc-davinci.o obj-$(CONFIG_RTC_DRV_DM355EVM) += rtc-dm355evm.o obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c new file mode 100644 index 0000000..da6ab52 --- /dev/null +++ b/drivers/rtc/rtc-da9052.c @@ -0,0 +1,293 @@ +/* + * Real time clock driver for DA9052 + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: Dajun Dajun Chen + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include +#include +#include + +#include +#include + +#define rtc_err(da9052, fmt, ...) \ + dev_err(da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__) + +struct da9052_rtc { + struct rtc_device *rtc; + struct da9052 *da9052; + int irq; +}; + +static int da9052_rtc_enable_alarm(struct da9052 *da9052, bool enable) +{ + int ret; + if (enable) { + ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG, + DA9052_ALARM_Y_ALARM_ON, + DA9052_ALARM_Y_ALARM_ON); + if (ret != 0) + rtc_err(da9052, "Failed to enable ALM: %d\n", ret); + } else { + ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG, + DA9052_ALARM_Y_ALARM_ON, 0); + if (ret != 0) + rtc_err(da9052, "Write error: %d\n", ret); + } + return ret; +} + +static irqreturn_t da9052_rtc_irq(int irq, void *data) +{ + struct da9052_rtc *rtc = data; + int ret; + + ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_MI_REG); + if (ret < 0) { + rtc_err(rtc->da9052, "Read error: %d\n", ret); + return IRQ_NONE; + } + + if (ret & DA9052_ALARMMI_ALARMTYPE) { + da9052_rtc_enable_alarm(rtc->da9052, 0); + rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF); + } else + rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_PF); + + return IRQ_HANDLED; +} + +static int da9052_read_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm) +{ + int ret; + uint8_t v[5]; + + ret = da9052_group_read(da9052, DA9052_ALARM_MI_REG, 5, v); + if (ret != 0) { + rtc_err(da9052, "Failed to group read ALM: %d\n", ret); + return ret; + } + + rtc_tm->tm_year = (v[4] & DA9052_RTC_YEAR) + 100; + rtc_tm->tm_mon = (v[3] & DA9052_RTC_MONTH) - 1; + rtc_tm->tm_mday = v[2] & DA9052_RTC_DAY; + rtc_tm->tm_hour = v[1] & DA9052_RTC_HOUR; + rtc_tm->tm_min = v[0] & DA9052_RTC_MIN; + + ret = rtc_valid_tm(rtc_tm); + if (ret != 0) + return ret; + return ret; +} + +static int da9052_set_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm) +{ + int ret; + uint8_t v[3]; + + rtc_tm->tm_year -= 100; + rtc_tm->tm_mon += 1; + + ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG, + DA9052_RTC_MIN, rtc_tm->tm_min); + if (ret != 0) { + rtc_err(da9052, "Failed to write ALRM MIN: %d\n", ret); + return ret; + } + + v[0] = rtc_tm->tm_hour; + v[1] = rtc_tm->tm_mday; + v[2] = rtc_tm->tm_mon; + + ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v); + if (ret < 0) + return ret; + + ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG, + DA9052_RTC_YEAR, rtc_tm->tm_year); + if (ret != 0) + rtc_err(da9052, "Failed to write ALRM YEAR: %d\n", ret); + + return ret; +} + +static int da9052_rtc_get_alarm_status(struct da9052 *da9052) +{ + int ret; + + ret = da9052_reg_read(da9052, DA9052_ALARM_Y_REG); + if (ret < 0) { + rtc_err(da9052, "Failed to read ALM: %d\n", ret); + return ret; + } + ret &= DA9052_ALARM_Y_ALARM_ON; + return (ret > 0) ? 1 : 0; +} + +static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm) +{ + struct da9052_rtc *rtc = dev_get_drvdata(dev); + uint8_t v[6]; + int ret; + + ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, v); + if (ret < 0) { + rtc_err(rtc->da9052, "Failed to read RTC time : %d\n", ret); + return ret; + } + + rtc_tm->tm_year = (v[5] & DA9052_RTC_YEAR) + 100; + rtc_tm->tm_mon = (v[4] & DA9052_RTC_MONTH) - 1; + rtc_tm->tm_mday = v[3] & DA9052_RTC_DAY; + rtc_tm->tm_hour = v[2] & DA9052_RTC_HOUR; + rtc_tm->tm_min = v[1] & DA9052_RTC_MIN; + rtc_tm->tm_sec = v[0] & DA9052_RTC_SEC; + + ret = rtc_valid_tm(rtc_tm); + if (ret != 0) { + rtc_err(rtc->da9052, "rtc_valid_tm failed: %d\n", ret); + return ret; + } + + return 0; +} + +static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct da9052_rtc *rtc; + uint8_t v[6]; + + rtc = dev_get_drvdata(dev); + + v[0] = tm->tm_sec; + v[1] = tm->tm_min; + v[2] = tm->tm_hour; + v[3] = tm->tm_mday; + v[4] = tm->tm_mon + 1; + v[5] = tm->tm_year - 100; + + return da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v); +} + +static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + int ret; + struct rtc_time *tm = &alrm->time; + struct da9052_rtc *rtc = dev_get_drvdata(dev); + + ret = da9052_read_alarm(rtc->da9052, tm); + + if (ret) + return ret; + + alrm->enabled = da9052_rtc_get_alarm_status(rtc->da9052); + + return 0; +} + +static int da9052_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + int ret; + struct rtc_time *tm = &alrm->time; + struct da9052_rtc *rtc = dev_get_drvdata(dev); + + ret = da9052_rtc_enable_alarm(rtc->da9052, 0); + if (ret < 0) + return ret; + + ret = da9052_set_alarm(rtc->da9052, tm); + if (ret) + return ret; + + ret = da9052_rtc_enable_alarm(rtc->da9052, 1); + + return ret; +} + +static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct da9052_rtc *rtc = dev_get_drvdata(dev); + + return da9052_rtc_enable_alarm(rtc->da9052, enabled); +} + +static const struct rtc_class_ops da9052_rtc_ops = { + .read_time = da9052_rtc_read_time, + .set_time = da9052_rtc_set_time, + .read_alarm = da9052_rtc_read_alarm, + .set_alarm = da9052_rtc_set_alarm, + .alarm_irq_enable = da9052_rtc_alarm_irq_enable, +}; + +static int __devinit da9052_rtc_probe(struct platform_device *pdev) +{ + struct da9052_rtc *rtc; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->da9052 = dev_get_drvdata(pdev->dev.parent); + platform_set_drvdata(pdev, rtc); + rtc->irq = platform_get_irq_byname(pdev, "ALM"); + ret = request_threaded_irq(rtc->irq, NULL, da9052_rtc_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "ALM", rtc); + if (ret != 0) { + rtc_err(rtc->da9052, "irq registration failed: %d\n", ret); + goto err_mem; + } + + rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, + &da9052_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc)) { + ret = PTR_ERR(rtc->rtc); + goto err_free_irq; + } + + return 0; + +err_free_irq: + free_irq(rtc->irq, rtc); +err_mem: + devm_kfree(&pdev->dev, rtc); + return ret; +} + +static int __devexit da9052_rtc_remove(struct platform_device *pdev) +{ + struct da9052_rtc *rtc = pdev->dev.platform_data; + + rtc_device_unregister(rtc->rtc); + free_irq(rtc->irq, rtc); + platform_set_drvdata(pdev, NULL); + devm_kfree(&pdev->dev, rtc); + + return 0; +} + +static struct platform_driver da9052_rtc_driver = { + .probe = da9052_rtc_probe, + .remove = __devexit_p(da9052_rtc_remove), + .driver = { + .name = "da9052-rtc", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9052_rtc_driver); + +MODULE_AUTHOR("David Dajun Chen "); +MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-rtc"); -- cgit v0.10.2 From 32d322bcb0d6886084197247e30aa130956d5978 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Fri, 23 Mar 2012 15:02:36 -0700 Subject: rtc: ds1307: refactor chip_desc table The chip_desc table is suboptimal. Currently it requires an entry for every new chip type, even if it is empty. This has already been forgotten for the ds1388. Refactor the code, so new entries are only needed, when they chip type really needs a (non-empty) description. Also make the table visually more appealing. Signed-off-by: Wolfram Sang Cc: Austin Boyle Cc: David Anders Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 58edcb0..5098e1a 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -36,6 +36,7 @@ enum ds_type { m41t00, mcp7941x, rx_8025, + last_ds_type /* always last */ // rs5c372 too? different address... }; @@ -120,30 +121,23 @@ struct chip_desc { unsigned alarm:1; }; -static const struct chip_desc chips[] = { -[ds_1307] = { - .nvram56 = 1, -}, -[ds_1337] = { - .alarm = 1, -}, -[ds_1338] = { - .nvram56 = 1, -}, -[ds_1339] = { - .alarm = 1, -}, -[ds_1340] = { -}, -[ds_3231] = { - .alarm = 1, -}, -[m41t00] = { -}, -[mcp7941x] = { -}, -[rx_8025] = { -}, }; +static const struct chip_desc chips[last_ds_type] = { + [ds_1307] = { + .nvram56 = 1, + }, + [ds_1337] = { + .alarm = 1, + }, + [ds_1338] = { + .nvram56 = 1, + }, + [ds_1339] = { + .alarm = 1, + }, + [ds_3231] = { + .alarm = 1, + }, +}; static const struct i2c_device_id ds1307_id[] = { { "ds1307", ds_1307 }, @@ -836,11 +830,7 @@ read_rtc: } break; - case rx_8025: - case ds_1337: - case ds_1339: - case ds_1388: - case ds_3231: + default: break; } -- cgit v0.10.2 From b24a7267709bb0adb694364572478f919e9c7390 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Fri, 23 Mar 2012 15:02:37 -0700 Subject: rtc: ds1307: simplify irq setup code No need to have two seperate if-blocks for setting up the irq. Signed-off-by: Wolfram Sang Tested-by: David Anders Cc: Austin Boyle Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 5098e1a..d4543e8 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -646,11 +646,6 @@ static int __devinit ds1307_probe(struct i2c_client *client, case ds_1337: case ds_1339: case ds_3231: - /* has IRQ? */ - if (ds1307->client->irq > 0 && chip->alarm) { - INIT_WORK(&ds1307->work, ds1307_work); - want_irq = true; - } /* get registers that the "rtc" read below won't read... */ tmp = ds1307->read_block_data(ds1307->client, DS1337_REG_CONTROL, 2, buf); @@ -668,10 +663,14 @@ static int __devinit ds1307_probe(struct i2c_client *client, * For some variants, be sure alarms can trigger when we're * running on Vbackup (BBSQI/BBSQW) */ - if (want_irq) { + if (ds1307->client->irq > 0 && chip->alarm) { + INIT_WORK(&ds1307->work, ds1307_work); + ds1307->regs[0] |= DS1337_BIT_INTCN | bbsqi_bitpos[ds1307->type]; ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE); + + want_irq = true; } i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, -- cgit v0.10.2 From 40ce972d59fcfd4979e5de04456122447b40c1cf Mon Sep 17 00:00:00 2001 From: David Anders Date: Fri, 23 Mar 2012 15:02:37 -0700 Subject: rtc: ds1307: comment and format cleanup Do some cleanup of the comment sections as well as correct some formatting issues reported by checkpatch.pl. Signed-off-by: David Anders Signed-off-by: Wolfram Sang Cc: Austin Boyle Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index d4543e8..84ab971 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -20,7 +20,8 @@ -/* We can't determine type by probing, but if we expect pre-Linux code +/* + * We can't determine type by probing, but if we expect pre-Linux code * to have set the chip up as a clock (turning on the oscillator and * setting the date and time), Linux can ignore the non-clock features. * That's a natural job for a factory or repair bench. @@ -37,7 +38,7 @@ enum ds_type { mcp7941x, rx_8025, last_ds_type /* always last */ - // rs5c372 too? different address... + /* rs5c372 too? different address... */ }; @@ -59,7 +60,8 @@ enum ds_type { # define DS1337_BIT_CENTURY 0x80 /* in REG_MONTH */ #define DS1307_REG_YEAR 0x06 /* 00-99 */ -/* Other registers (control, status, alarms, trickle charge, NVRAM, etc) +/* + * Other registers (control, status, alarms, trickle charge, NVRAM, etc) * start at 7, and they differ a LOT. Only control and status matter for * basic RTC date and time functionality; be careful using them. */ @@ -366,6 +368,11 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) | DS1340_BIT_CENTURY; break; case mcp7941x: + /* + * these bits were cleared when preparing the date/time + * values and need to be set again before writing the + * buffer out to the device. + */ buf[DS1307_REG_SECS] |= MCP7941X_BIT_ST; buf[DS1307_REG_WDAY] |= MCP7941X_BIT_VBATEN; break; @@ -411,7 +418,8 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t) ds1307->regs[6], ds1307->regs[7], ds1307->regs[8]); - /* report alarm time (ALARM1); assume 24 hour and day-of-month modes, + /* + * report alarm time (ALARM1); assume 24 hour and day-of-month modes, * and that all four fields are checked matches */ t->time.tm_sec = bcd2bin(ds1307->regs[0] & 0x7f); @@ -439,7 +447,7 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t) static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = to_i2c_client(dev); struct ds1307 *ds1307 = i2c_get_clientdata(client); unsigned char *buf = ds1307->regs; u8 control, status; @@ -602,8 +610,6 @@ static struct bin_attribute nvram = { /*----------------------------------------------------------------------*/ -static struct i2c_driver ds1307_driver; - static int __devinit ds1307_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -624,7 +630,8 @@ static int __devinit ds1307_probe(struct i2c_client *client, && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) return -EIO; - if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL))) + ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL); + if (!ds1307) return -ENOMEM; i2c_set_clientdata(client, ds1307); @@ -659,7 +666,8 @@ static int __devinit ds1307_probe(struct i2c_client *client, if (ds1307->regs[0] & DS1337_BIT_nEOSC) ds1307->regs[0] &= ~DS1337_BIT_nEOSC; - /* Using IRQ? Disable the square wave and both alarms. + /* + * Using IRQ? Disable the square wave and both alarms. * For some variants, be sure alarms can trigger when we're * running on Vbackup (BBSQI/BBSQW) */ @@ -765,7 +773,8 @@ read_rtc: goto exit_free; } - /* minimal sanity checking; some chips (like DS1340) don't + /* + * minimal sanity checking; some chips (like DS1340) don't * specify the extra bits as must-be-zero, but there are * still a few values that are clearly out-of-range. */ @@ -837,7 +846,8 @@ read_rtc: switch (ds1307->type) { case ds_1340: case m41t00: - /* NOTE: ignores century bits; fix before deploying + /* + * NOTE: ignores century bits; fix before deploying * systems that will run through year 2100. */ break; @@ -847,7 +857,8 @@ read_rtc: if (!(tmp & DS1307_BIT_12HR)) break; - /* Be sure we're in 24 hour mode. Multi-master systems + /* + * Be sure we're in 24 hour mode. Multi-master systems * take note... */ tmp = bcd2bin(tmp & 0x1f); @@ -902,7 +913,7 @@ exit_free: static int __devexit ds1307_remove(struct i2c_client *client) { - struct ds1307 *ds1307 = i2c_get_clientdata(client); + struct ds1307 *ds1307 = i2c_get_clientdata(client); if (test_and_clear_bit(HAS_ALARM, &ds1307->flags)) { free_irq(client->irq, client); -- cgit v0.10.2 From 9eab0a788d2d6e513f43b7c0e5bb9d60446233cb Mon Sep 17 00:00:00 2001 From: Austin Boyle Date: Fri, 23 Mar 2012 15:02:38 -0700 Subject: rtc: ds1307: generalise ram size and offset Generalise NVRAM to support RAM with other size and offset, such as the 64 bytes of SRAM on the mcp7941x. [rdunlap@xenotime.net: fix printk format warning] Signed-off-by: Austin Boyle Signed-off-by: Wolfram Sang Signed-off-by: Randy Dunlap Cc: David Anders Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 84ab971..cd188ab 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -105,6 +105,8 @@ enum ds_type { struct ds1307 { u8 offset; /* register's offset */ u8 regs[11]; + u16 nvram_offset; + struct bin_attribute *nvram; enum ds_type type; unsigned long flags; #define HAS_NVRAM 0 /* bit 0 == sysfs file active */ @@ -119,19 +121,22 @@ struct ds1307 { }; struct chip_desc { - unsigned nvram56:1; unsigned alarm:1; + u16 nvram_offset; + u16 nvram_size; }; static const struct chip_desc chips[last_ds_type] = { [ds_1307] = { - .nvram56 = 1, + .nvram_offset = 8, + .nvram_size = 56, }, [ds_1337] = { .alarm = 1, }, [ds_1338] = { - .nvram56 = 1, + .nvram_offset = 8, + .nvram_size = 56, }, [ds_1339] = { .alarm = 1, @@ -139,6 +144,11 @@ static const struct chip_desc chips[last_ds_type] = { [ds_3231] = { .alarm = 1, }, + [mcp7941x] = { + /* this is battery backed SRAM */ + .nvram_offset = 0x20, + .nvram_size = 0x40, + }, }; static const struct i2c_device_id ds1307_id[] = { @@ -543,8 +553,6 @@ static const struct rtc_class_ops ds13xx_rtc_ops = { /*----------------------------------------------------------------------*/ -#define NVRAM_SIZE 56 - static ssize_t ds1307_nvram_read(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, @@ -557,14 +565,15 @@ ds1307_nvram_read(struct file *filp, struct kobject *kobj, client = kobj_to_i2c_client(kobj); ds1307 = i2c_get_clientdata(client); - if (unlikely(off >= NVRAM_SIZE)) + if (unlikely(off >= ds1307->nvram->size)) return 0; - if ((off + count) > NVRAM_SIZE) - count = NVRAM_SIZE - off; + if ((off + count) > ds1307->nvram->size) + count = ds1307->nvram->size - off; if (unlikely(!count)) return count; - result = ds1307->read_block_data(client, 8 + off, count, buf); + result = ds1307->read_block_data(client, ds1307->nvram_offset + off, + count, buf); if (result < 0) dev_err(&client->dev, "%s error %d\n", "nvram read", result); return result; @@ -582,14 +591,15 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj, client = kobj_to_i2c_client(kobj); ds1307 = i2c_get_clientdata(client); - if (unlikely(off >= NVRAM_SIZE)) + if (unlikely(off >= ds1307->nvram->size)) return -EFBIG; - if ((off + count) > NVRAM_SIZE) - count = NVRAM_SIZE - off; + if ((off + count) > ds1307->nvram->size) + count = ds1307->nvram->size - off; if (unlikely(!count)) return count; - result = ds1307->write_block_data(client, 8 + off, count, buf); + result = ds1307->write_block_data(client, ds1307->nvram_offset + off, + count, buf); if (result < 0) { dev_err(&client->dev, "%s error %d\n", "nvram write", result); return result; @@ -597,17 +607,6 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj, return count; } -static struct bin_attribute nvram = { - .attr = { - .name = "nvram", - .mode = S_IRUGO | S_IWUSR, - }, - - .read = ds1307_nvram_read, - .write = ds1307_nvram_write, - .size = NVRAM_SIZE, -}; - /*----------------------------------------------------------------------*/ static int __devinit ds1307_probe(struct i2c_client *client, @@ -894,16 +893,31 @@ read_rtc: dev_dbg(&client->dev, "got IRQ %d\n", client->irq); } - if (chip->nvram56) { - err = sysfs_create_bin_file(&client->dev.kobj, &nvram); - if (err == 0) { - set_bit(HAS_NVRAM, &ds1307->flags); - dev_info(&client->dev, "56 bytes nvram\n"); + if (chip->nvram_size) { + ds1307->nvram = kzalloc(sizeof(struct bin_attribute), + GFP_KERNEL); + if (!ds1307->nvram) { + err = -ENOMEM; + goto exit_nvram; + } + ds1307->nvram->attr.name = "nvram"; + ds1307->nvram->attr.mode = S_IRUGO | S_IWUSR; + ds1307->nvram->read = ds1307_nvram_read, + ds1307->nvram->write = ds1307_nvram_write, + ds1307->nvram->size = chip->nvram_size; + ds1307->nvram_offset = chip->nvram_offset; + err = sysfs_create_bin_file(&client->dev.kobj, ds1307->nvram); + if (err) { + kfree(ds1307->nvram); + goto exit_nvram; } + set_bit(HAS_NVRAM, &ds1307->flags); + dev_info(&client->dev, "%zu bytes nvram\n", ds1307->nvram->size); } return 0; +exit_nvram: exit_irq: rtc_device_unregister(ds1307->rtc); exit_free: @@ -920,8 +934,10 @@ static int __devexit ds1307_remove(struct i2c_client *client) cancel_work_sync(&ds1307->work); } - if (test_and_clear_bit(HAS_NVRAM, &ds1307->flags)) - sysfs_remove_bin_file(&client->dev.kobj, &nvram); + if (test_and_clear_bit(HAS_NVRAM, &ds1307->flags)) { + sysfs_remove_bin_file(&client->dev.kobj, ds1307->nvram); + kfree(ds1307->nvram); + } rtc_device_unregister(ds1307->rtc); kfree(ds1307); -- cgit v0.10.2 From 41f0c02eacec9f984adb22e8fecda49e13b7eb13 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Fri, 23 Mar 2012 15:02:38 -0700 Subject: fat: clean up xlate_to_uni() xlate_to_uni() is called by vfat_build_slots() with sbi->nls_io as the final argument. nls_io can never be null at this point because the check is already being done in fat_fill_super() wherein the mount fails if it is null. Signed-off-by: Namjae Jeon Signed-off-by: Ravishankar N Acked-by: OGAWA Hirofumi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index a81eb23..aae3b4e 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -521,57 +521,46 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, op = &outname[*outlen * sizeof(wchar_t)]; } else { - if (nls) { - for (i = 0, ip = name, op = outname, *outlen = 0; - i < len && *outlen <= FAT_LFN_LEN; - *outlen += 1) - { - if (escape && (*ip == ':')) { - if (i > len - 5) - return -EINVAL; - ec = 0; - for (k = 1; k < 5; k++) { - nc = ip[k]; - ec <<= 4; - if (nc >= '0' && nc <= '9') { - ec |= nc - '0'; - continue; - } - if (nc >= 'a' && nc <= 'f') { - ec |= nc - ('a' - 10); - continue; - } - if (nc >= 'A' && nc <= 'F') { - ec |= nc - ('A' - 10); - continue; - } - return -EINVAL; + for (i = 0, ip = name, op = outname, *outlen = 0; + i < len && *outlen <= FAT_LFN_LEN; + *outlen += 1) { + if (escape && (*ip == ':')) { + if (i > len - 5) + return -EINVAL; + ec = 0; + for (k = 1; k < 5; k++) { + nc = ip[k]; + ec <<= 4; + if (nc >= '0' && nc <= '9') { + ec |= nc - '0'; + continue; } - *op++ = ec & 0xFF; - *op++ = ec >> 8; - ip += 5; - i += 5; - } else { - if ((charlen = nls->char2uni(ip, len - i, (wchar_t *)op)) < 0) - return -EINVAL; - ip += charlen; - i += charlen; - op += 2; + if (nc >= 'a' && nc <= 'f') { + ec |= nc - ('a' - 10); + continue; + } + if (nc >= 'A' && nc <= 'F') { + ec |= nc - ('A' - 10); + continue; + } + return -EINVAL; } + *op++ = ec & 0xFF; + *op++ = ec >> 8; + ip += 5; + i += 5; + } else { + charlen = nls->char2uni(ip, len - i, + (wchar_t *)op); + if (charlen < 0) + return -EINVAL; + ip += charlen; + i += charlen; + op += 2; } - if (i < len) - return -ENAMETOOLONG; - } else { - for (i = 0, ip = name, op = outname, *outlen = 0; - i < len && *outlen <= FAT_LFN_LEN; - i++, *outlen += 1) - { - *op++ = *ip++; - *op++ = 0; - } - if (i < len) - return -ENAMETOOLONG; } + if (i < len) + return -ENAMETOOLONG; } *longlen = *outlen; -- cgit v0.10.2 From d533df07c20c7b59b0559a3ac38fb45c81ffd6bb Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Fri, 23 Mar 2012 15:02:39 -0700 Subject: fat: fix bug in enforcing Long File Name length Since '*outlen' is initialized to zero, it is currently possible to create a filename of length (FAT_LFN_LEN + 1) when utf8 is not enabled. To enforce the FAT_LFN_LEN limit, we must perform one less iteration. Signed-off-by: Namjae Jeon Signed-off-by: Ravishankar N Acked-by: OGAWA Hirofumi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index aae3b4e..98ae804 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -522,7 +522,7 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, op = &outname[*outlen * sizeof(wchar_t)]; } else { for (i = 0, ip = name, op = outname, *outlen = 0; - i < len && *outlen <= FAT_LFN_LEN; + i < len && *outlen < FAT_LFN_LEN; *outlen += 1) { if (escape && (*ip == ':')) { if (i > len - 5) -- cgit v0.10.2 From 15cab952139404d0e593cb1aaab0a3547ac0f95b Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:39 -0700 Subject: ptrace: the killed tracee should not enter the syscall Another old/known problem. If the tracee is killed after it reports syscall_entry, it starts the syscall and debugger can't control this. This confuses the users and this creates the security problems for ptrace jailers. Change tracehook_report_syscall_entry() to return non-zero if killed, this instructs syscall_trace_enter() to abort the syscall. Reported-by: Chris Evans Tested-by: Indan Zupancic Signed-off-by: Oleg Nesterov Cc: Denys Vlasenko Cc: Tejun Heo Cc: Pedro Alves Cc: Jan Kratochvil Cc: Steven Rostedt Cc: Frederic Weisbecker Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index a71a292..51bd91d 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -54,12 +54,12 @@ struct linux_binprm; /* * ptrace report for syscall entry and exit looks identical. */ -static inline void ptrace_report_syscall(struct pt_regs *regs) +static inline int ptrace_report_syscall(struct pt_regs *regs) { int ptrace = current->ptrace; if (!(ptrace & PT_PTRACED)) - return; + return 0; ptrace_notify(SIGTRAP | ((ptrace & PT_TRACESYSGOOD) ? 0x80 : 0)); @@ -72,6 +72,8 @@ static inline void ptrace_report_syscall(struct pt_regs *regs) send_sig(current->exit_code, current, 1); current->exit_code = 0; } + + return fatal_signal_pending(current); } /** @@ -96,8 +98,7 @@ static inline void ptrace_report_syscall(struct pt_regs *regs) static inline __must_check int tracehook_report_syscall_entry( struct pt_regs *regs) { - ptrace_report_syscall(regs); - return 0; + return ptrace_report_syscall(regs); } /** -- cgit v0.10.2 From b1845ff53f1a9eadba005ae53dfe60ab00dfe83b Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:40 -0700 Subject: ptrace: don't send SIGTRAP on exec if SEIZED ptrace_event(PTRACE_EVENT_EXEC) sends SIGTRAP if PT_TRACE_EXEC is not set. This is because this SIGTRAP predates PTRACE_O_TRACEEXEC option, we do not need/want this with PT_SEIZED which can set the options during attach. Suggested-by: Pedro Alves Signed-off-by: Oleg Nesterov Cc: Chris Evans Cc: Indan Zupancic Cc: Denys Vlasenko Cc: Tejun Heo Cc: Pedro Alves Cc: Jan Kratochvil Cc: Steven Rostedt Cc: Frederic Weisbecker Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index c2f1f6a..6fdb196 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -199,9 +199,10 @@ static inline void ptrace_event(int event, unsigned long message) if (unlikely(ptrace_event_enabled(current, event))) { current->ptrace_message = message; ptrace_notify((event << 8) | SIGTRAP); - } else if (event == PTRACE_EVENT_EXEC && unlikely(current->ptrace)) { + } else if (event == PTRACE_EVENT_EXEC) { /* legacy EXEC report via SIGTRAP */ - send_sig(SIGTRAP, current, 0); + if ((current->ptrace & (PT_PTRACED|PT_SEIZED)) == PT_PTRACED) + send_sig(SIGTRAP, current, 0); } } -- cgit v0.10.2 From 8c5cf9e5c50dc902713897e10201aa71f3546aa1 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 23 Mar 2012 15:02:40 -0700 Subject: ptrace: don't modify flags on PTRACE_SETOPTIONS failure On ptrace(PTRACE_SETOPTIONS, pid, 0, ), we used to set those option bits which are known, and then fail with -EINVAL if there are some unknown bits in . This is inconsistent with typical error handling, which does not change any state if input is invalid. This patch changes PTRACE_SETOPTIONS behavior so that in this case, we return -EINVAL and don't change any bits in task->ptrace. It's very unlikely that there is userspace code in the wild which will be affected by this change: it should have the form ptrace(PTRACE_SETOPTIONS, pid, 0, PTRACE_O_BOGUSOPT) where PTRACE_O_BOGUSOPT is a constant unknown to the kernel. But kernel headers, naturally, don't contain any PTRACE_O_BOGUSOPTs, thus the only way userspace can use one if it defines one itself. I can't see why anyone would do such a thing deliberately. Signed-off-by: Denys Vlasenko Acked-by: Tejun Heo Reviewed-by: Oleg Nesterov Cc: Pedro Alves Cc: Jan Kratochvil Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 00ab2ca..273f56e 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -528,6 +528,9 @@ int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long ds static int ptrace_setoptions(struct task_struct *child, unsigned long data) { + if (data & ~(unsigned long)PTRACE_O_MASK) + return -EINVAL; + child->ptrace &= ~PT_TRACE_MASK; if (data & PTRACE_O_TRACESYSGOOD) @@ -551,7 +554,7 @@ static int ptrace_setoptions(struct task_struct *child, unsigned long data) if (data & PTRACE_O_TRACEEXIT) child->ptrace |= PT_TRACE_EXIT; - return (data & ~PTRACE_O_MASK) ? -EINVAL : 0; + return 0; } static int ptrace_getsiginfo(struct task_struct *child, siginfo_t *info) -- cgit v0.10.2 From 86b6c1f301faf085de5a3f9ce16b8de6e69c729b Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 23 Mar 2012 15:02:41 -0700 Subject: ptrace: simplify PTRACE_foo constants and PTRACE_SETOPTIONS code Exchange PT_TRACESYSGOOD and PT_PTRACE_CAP bit positions, which makes PT_option bits contiguous and therefore makes code in ptrace_setoptions() much simpler. Every PTRACE_O_TRACEevent is defined to (1 << PTRACE_EVENT_event) instead of using explicit numeric constants, to ensure we don't mess up relationship between bit positions and event ids. PT_EVENT_FLAG_SHIFT was not particularly useful, PT_OPT_FLAG_SHIFT with value of PT_EVENT_FLAG_SHIFT-1 is easier to use. PT_TRACE_MASK constant is nuked, the only its use is replaced by (PTRACE_O_MASK << PT_OPT_FLAG_SHIFT). Signed-off-by: Denys Vlasenko Acked-by: Tejun Heo Reviewed-by: Oleg Nesterov Cc: Pedro Alves Cc: Jan Kratochvil Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index 6fdb196..6f1260e 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -54,17 +54,6 @@ /* flags in @data for PTRACE_SEIZE */ #define PTRACE_SEIZE_DEVEL 0x80000000 /* temp flag for development */ -/* options set using PTRACE_SETOPTIONS */ -#define PTRACE_O_TRACESYSGOOD 0x00000001 -#define PTRACE_O_TRACEFORK 0x00000002 -#define PTRACE_O_TRACEVFORK 0x00000004 -#define PTRACE_O_TRACECLONE 0x00000008 -#define PTRACE_O_TRACEEXEC 0x00000010 -#define PTRACE_O_TRACEVFORKDONE 0x00000020 -#define PTRACE_O_TRACEEXIT 0x00000040 - -#define PTRACE_O_MASK 0x0000007f - /* Wait extended result codes for the above trace options. */ #define PTRACE_EVENT_FORK 1 #define PTRACE_EVENT_VFORK 2 @@ -74,6 +63,17 @@ #define PTRACE_EVENT_EXIT 6 #define PTRACE_EVENT_STOP 7 +/* options set using PTRACE_SETOPTIONS */ +#define PTRACE_O_TRACESYSGOOD 1 +#define PTRACE_O_TRACEFORK (1 << PTRACE_EVENT_FORK) +#define PTRACE_O_TRACEVFORK (1 << PTRACE_EVENT_VFORK) +#define PTRACE_O_TRACECLONE (1 << PTRACE_EVENT_CLONE) +#define PTRACE_O_TRACEEXEC (1 << PTRACE_EVENT_EXEC) +#define PTRACE_O_TRACEVFORKDONE (1 << PTRACE_EVENT_VFORK_DONE) +#define PTRACE_O_TRACEEXIT (1 << PTRACE_EVENT_EXIT) + +#define PTRACE_O_MASK 0x0000007f + #include #ifdef __KERNEL__ @@ -88,13 +88,12 @@ #define PT_SEIZED 0x00010000 /* SEIZE used, enable new behavior */ #define PT_PTRACED 0x00000001 #define PT_DTRACE 0x00000002 /* delayed trace (used on m68k, i386) */ -#define PT_TRACESYSGOOD 0x00000004 -#define PT_PTRACE_CAP 0x00000008 /* ptracer can follow suid-exec */ +#define PT_PTRACE_CAP 0x00000004 /* ptracer can follow suid-exec */ +#define PT_OPT_FLAG_SHIFT 3 /* PT_TRACE_* event enable flags */ -#define PT_EVENT_FLAG_SHIFT 4 -#define PT_EVENT_FLAG(event) (1 << (PT_EVENT_FLAG_SHIFT + (event) - 1)) - +#define PT_EVENT_FLAG(event) (1 << (PT_OPT_FLAG_SHIFT + (event))) +#define PT_TRACESYSGOOD PT_EVENT_FLAG(0) #define PT_TRACE_FORK PT_EVENT_FLAG(PTRACE_EVENT_FORK) #define PT_TRACE_VFORK PT_EVENT_FLAG(PTRACE_EVENT_VFORK) #define PT_TRACE_CLONE PT_EVENT_FLAG(PTRACE_EVENT_CLONE) @@ -102,8 +101,6 @@ #define PT_TRACE_VFORK_DONE PT_EVENT_FLAG(PTRACE_EVENT_VFORK_DONE) #define PT_TRACE_EXIT PT_EVENT_FLAG(PTRACE_EVENT_EXIT) -#define PT_TRACE_MASK 0x000003f4 - /* single stepping state bits (used on ARM and PA-RISC) */ #define PT_SINGLESTEP_BIT 31 #define PT_SINGLESTEP (1<ptrace &= ~PT_TRACE_MASK; - - if (data & PTRACE_O_TRACESYSGOOD) - child->ptrace |= PT_TRACESYSGOOD; - - if (data & PTRACE_O_TRACEFORK) - child->ptrace |= PT_TRACE_FORK; - - if (data & PTRACE_O_TRACEVFORK) - child->ptrace |= PT_TRACE_VFORK; - - if (data & PTRACE_O_TRACECLONE) - child->ptrace |= PT_TRACE_CLONE; - - if (data & PTRACE_O_TRACEEXEC) - child->ptrace |= PT_TRACE_EXEC; - - if (data & PTRACE_O_TRACEVFORKDONE) - child->ptrace |= PT_TRACE_VFORK_DONE; - - if (data & PTRACE_O_TRACEEXIT) - child->ptrace |= PT_TRACE_EXIT; + /* Avoid intermediate state when all opts are cleared */ + flags = child->ptrace; + flags &= ~(PTRACE_O_MASK << PT_OPT_FLAG_SHIFT); + flags |= (data << PT_OPT_FLAG_SHIFT); + child->ptrace = flags; return 0; } -- cgit v0.10.2 From aa9147c98f27550bd39416eca5a5844e54bced26 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 23 Mar 2012 15:02:42 -0700 Subject: ptrace: make PTRACE_SEIZE set ptrace options specified in 'data' parameter This can be used to close a few corner cases in strace where we get unwanted racy behavior after attach, but before we have a chance to set options (the notorious post-execve SIGTRAP comes to mind), and removes the need to track "did we set opts for this task" state in strace internals. While we are at it: Make it possible to extend SEIZE in the future with more functionality by passing non-zero 'addr' parameter. To that end, error out if 'addr' is non-zero. PTRACE_ATTACH did not (and still does not) have such check, and users (strace) do pass garbage there... let's avoid repeating this mistake with SEIZE. Set all task->ptrace bits in one operation - before this change, we were adding PT_SEIZED and PT_PTRACE_CAP with task->ptrace |= BIT ops. This was probably ok (not a bug), but let's be on a safer side. Changes since v2: use (unsigned long) casts instead of (long) ones, move PTRACE_SEIZE_DEVEL-related code to separate lines of code. Signed-off-by: Denys Vlasenko Acked-by: Tejun Heo Cc: Pedro Alves Reviewed-by: Oleg Nesterov Cc: Jan Kratochvil Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 9acd07a..4661c5b 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -231,6 +231,7 @@ bool ptrace_may_access(struct task_struct *task, unsigned int mode) } static int ptrace_attach(struct task_struct *task, long request, + unsigned long addr, unsigned long flags) { bool seize = (request == PTRACE_SEIZE); @@ -238,19 +239,29 @@ static int ptrace_attach(struct task_struct *task, long request, /* * SEIZE will enable new ptrace behaviors which will be implemented - * gradually. SEIZE_DEVEL is used to prevent applications + * gradually. SEIZE_DEVEL bit is used to prevent applications * expecting full SEIZE behaviors trapping on kernel commits which * are still in the process of implementing them. * * Only test programs for new ptrace behaviors being implemented * should set SEIZE_DEVEL. If unset, SEIZE will fail with -EIO. * - * Once SEIZE behaviors are completely implemented, this flag and - * the following test will be removed. + * Once SEIZE behaviors are completely implemented, this flag + * will be removed. */ retval = -EIO; - if (seize && !(flags & PTRACE_SEIZE_DEVEL)) - goto out; + if (seize) { + if (addr != 0) + goto out; + if (!(flags & PTRACE_SEIZE_DEVEL)) + goto out; + flags &= ~(unsigned long)PTRACE_SEIZE_DEVEL; + if (flags & ~(unsigned long)PTRACE_O_MASK) + goto out; + flags = PT_PTRACED | PT_SEIZED | (flags << PT_OPT_FLAG_SHIFT); + } else { + flags = PT_PTRACED; + } audit_ptrace(task); @@ -282,11 +293,11 @@ static int ptrace_attach(struct task_struct *task, long request, if (task->ptrace) goto unlock_tasklist; - task->ptrace = PT_PTRACED; if (seize) - task->ptrace |= PT_SEIZED; + flags |= PT_SEIZED; if (ns_capable(task_user_ns(task), CAP_SYS_PTRACE)) - task->ptrace |= PT_PTRACE_CAP; + flags |= PT_PTRACE_CAP; + task->ptrace = flags; __ptrace_link(task, current); @@ -879,7 +890,7 @@ SYSCALL_DEFINE4(ptrace, long, request, long, pid, unsigned long, addr, } if (request == PTRACE_ATTACH || request == PTRACE_SEIZE) { - ret = ptrace_attach(child, request, data); + ret = ptrace_attach(child, request, addr, data); /* * Some architectures need to do book-keeping after * a ptrace attach. @@ -1022,7 +1033,7 @@ asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, } if (request == PTRACE_ATTACH || request == PTRACE_SEIZE) { - ret = ptrace_attach(child, request, data); + ret = ptrace_attach(child, request, addr, data); /* * Some architectures need to do book-keeping after * a ptrace attach. -- cgit v0.10.2 From 5cdf389aee90109e2e3d88085dea4dd5508a3be7 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 23 Mar 2012 15:02:42 -0700 Subject: ptrace: renumber PTRACE_EVENT_STOP so that future new options and events can match PTRACE_EVENT_foo and PTRACE_O_TRACEfoo used to match. New PTRACE_EVENT_STOP is the first event which has no corresponding PTRACE_O_TRACE option. If we will ever want to add another such option, its PTRACE_EVENT's value will collide with PTRACE_EVENT_STOP's value. This patch changes PTRACE_EVENT_STOP value to prevent this. While at it, added a comment - the one atop PTRACE_EVENT block, saying "Wait extended result codes for the above trace options", is not true for PTRACE_EVENT_STOP. Signed-off-by: Denys Vlasenko Cc: Tejun Heo Reviewed-by: Oleg Nesterov Cc: Pedro Alves Cc: Jan Kratochvil Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index 6f1260e..30be180 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -61,7 +61,8 @@ #define PTRACE_EVENT_EXEC 4 #define PTRACE_EVENT_VFORK_DONE 5 #define PTRACE_EVENT_EXIT 6 -#define PTRACE_EVENT_STOP 7 +/* Extended result codes which enabled by means other than options. */ +#define PTRACE_EVENT_STOP 128 /* options set using PTRACE_SETOPTIONS */ #define PTRACE_O_TRACESYSGOOD 1 -- cgit v0.10.2 From ee00560c7dac1dbbf048446a8489550d0a5765b7 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 23 Mar 2012 15:02:43 -0700 Subject: ptrace: remove PTRACE_SEIZE_DEVEL bit PTRACE_SEIZE code is tested and ready for production use, remove the code which requires special bit in data argument to make PTRACE_SEIZE work. Strace team prepares for a new release of strace, and we would like to ship the code which uses PTRACE_SEIZE, preferably after this change goes into released kernel. Signed-off-by: Denys Vlasenko Acked-by: Tejun Heo Acked-by: Oleg Nesterov Cc: Pedro Alves Cc: Jan Kratochvil Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index 30be180..407c678 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -51,9 +51,6 @@ #define PTRACE_INTERRUPT 0x4207 #define PTRACE_LISTEN 0x4208 -/* flags in @data for PTRACE_SEIZE */ -#define PTRACE_SEIZE_DEVEL 0x80000000 /* temp flag for development */ - /* Wait extended result codes for the above trace options. */ #define PTRACE_EVENT_FORK 1 #define PTRACE_EVENT_VFORK 2 @@ -64,7 +61,7 @@ /* Extended result codes which enabled by means other than options. */ #define PTRACE_EVENT_STOP 128 -/* options set using PTRACE_SETOPTIONS */ +/* Options set using PTRACE_SETOPTIONS or using PTRACE_SEIZE @data param */ #define PTRACE_O_TRACESYSGOOD 1 #define PTRACE_O_TRACEFORK (1 << PTRACE_EVENT_FORK) #define PTRACE_O_TRACEVFORK (1 << PTRACE_EVENT_VFORK) diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 4661c5b..ee8d49b 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -237,25 +237,10 @@ static int ptrace_attach(struct task_struct *task, long request, bool seize = (request == PTRACE_SEIZE); int retval; - /* - * SEIZE will enable new ptrace behaviors which will be implemented - * gradually. SEIZE_DEVEL bit is used to prevent applications - * expecting full SEIZE behaviors trapping on kernel commits which - * are still in the process of implementing them. - * - * Only test programs for new ptrace behaviors being implemented - * should set SEIZE_DEVEL. If unset, SEIZE will fail with -EIO. - * - * Once SEIZE behaviors are completely implemented, this flag - * will be removed. - */ retval = -EIO; if (seize) { if (addr != 0) goto out; - if (!(flags & PTRACE_SEIZE_DEVEL)) - goto out; - flags &= ~(unsigned long)PTRACE_SEIZE_DEVEL; if (flags & ~(unsigned long)PTRACE_O_MASK) goto out; flags = PT_PTRACED | PT_SEIZED | (flags << PT_OPT_FLAG_SHIFT); -- cgit v0.10.2 From 43aca3246cb7f736b20c11da9ce932a124a2a85a Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Fri, 23 Mar 2012 15:02:43 -0700 Subject: Hexagon: use set_current_blocked() and block_sigmask() As described in e6fa16ab9c1e ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov Acked-by: Richard Kuo Signed-off-by: Matt Fleming Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c index b45be31..ecbab34 100644 --- a/arch/hexagon/kernel/signal.c +++ b/arch/hexagon/kernel/signal.c @@ -192,12 +192,7 @@ static int handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka, if (rc) return rc; - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + block_sigmask(ka, sig); return 0; } @@ -305,10 +300,7 @@ asmlinkage int sys_rt_sigreturn(void) goto badframe; sigdelsetmask(&blocked, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = blocked; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&blocked); if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) goto badframe; -- cgit v0.10.2 From 629d362b9950166c6fac2aa8425db34d824bb043 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:44 -0700 Subject: signal: give SEND_SIG_FORCED more power to beat SIGNAL_UNKILLABLE force_sig_info() and friends have the special semantics for synchronous signals, this interface should not be used if the target is not current. And it needs the fixes, in particular the clearing of SIGNAL_UNKILLABLE is not exactly right. However there are callers which have to use force_ exactly because it clears SIGNAL_UNKILLABLE and thus it can kill the CLONE_NEWPID tasks, although this is almost always is wrong by various reasons. With this patch SEND_SIG_FORCED ignores SIGNAL_UNKILLABLE, like we do if the signal comes from the ancestor namespace. This makes the naming in prepare_signal() paths insane, fixed by the next cleanup. Note: this only affects SIGKILL/SIGSTOP, but this is enough for force_sig() abusers. Signed-off-by: Oleg Nesterov Cc: Tejun Heo Cc: Anton Vorontsov Cc: "Eric W. Biederman" Cc: KOSAKI Motohiro Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/signal.c b/kernel/signal.c index e76001c..2584f5a 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1059,7 +1059,8 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t, assert_spin_locked(&t->sighand->siglock); result = TRACE_SIGNAL_IGNORED; - if (!prepare_signal(sig, t, from_ancestor_ns)) + if (!prepare_signal(sig, t, + from_ancestor_ns || (info == SEND_SIG_FORCED))) goto ret; pending = group ? &t->signal->shared_pending : &t->pending; -- cgit v0.10.2 From def8cf72562e17ec8316ce0cb5697c7afd6400e3 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:45 -0700 Subject: signal: cosmetic, s/from_ancestor_ns/force/ in prepare_signal() paths Cosmetic, rename the from_ancestor_ns argument in prepare_signal() paths. After the previous change it doesn't match the reality. Signed-off-by: Oleg Nesterov Cc: Tejun Heo Cc: Anton Vorontsov Cc: "Eric W. Biederman" Cc: KOSAKI Motohiro Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/signal.c b/kernel/signal.c index 2584f5a..d523da0 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -58,21 +58,20 @@ static int sig_handler_ignored(void __user *handler, int sig) (handler == SIG_DFL && sig_kernel_ignore(sig)); } -static int sig_task_ignored(struct task_struct *t, int sig, - int from_ancestor_ns) +static int sig_task_ignored(struct task_struct *t, int sig, bool force) { void __user *handler; handler = sig_handler(t, sig); if (unlikely(t->signal->flags & SIGNAL_UNKILLABLE) && - handler == SIG_DFL && !from_ancestor_ns) + handler == SIG_DFL && !force) return 1; return sig_handler_ignored(handler, sig); } -static int sig_ignored(struct task_struct *t, int sig, int from_ancestor_ns) +static int sig_ignored(struct task_struct *t, int sig, bool force) { /* * Blocked signals are never ignored, since the @@ -82,7 +81,7 @@ static int sig_ignored(struct task_struct *t, int sig, int from_ancestor_ns) if (sigismember(&t->blocked, sig) || sigismember(&t->real_blocked, sig)) return 0; - if (!sig_task_ignored(t, sig, from_ancestor_ns)) + if (!sig_task_ignored(t, sig, force)) return 0; /* @@ -855,7 +854,7 @@ static void ptrace_trap_notify(struct task_struct *t) * Returns true if the signal should be actually delivered, otherwise * it should be dropped. */ -static int prepare_signal(int sig, struct task_struct *p, int from_ancestor_ns) +static int prepare_signal(int sig, struct task_struct *p, bool force) { struct signal_struct *signal = p->signal; struct task_struct *t; @@ -915,7 +914,7 @@ static int prepare_signal(int sig, struct task_struct *p, int from_ancestor_ns) } } - return !sig_ignored(p, sig, from_ancestor_ns); + return !sig_ignored(p, sig, force); } /* @@ -1602,7 +1601,7 @@ int send_sigqueue(struct sigqueue *q, struct task_struct *t, int group) ret = 1; /* the signal is ignored */ result = TRACE_SIGNAL_IGNORED; - if (!prepare_signal(sig, t, 0)) + if (!prepare_signal(sig, t, false)) goto out; ret = 0; -- cgit v0.10.2 From d2d393099de21eda91c5ec6a05d60e5dee4d5175 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:45 -0700 Subject: signal: oom_kill_task: use SEND_SIG_FORCED instead of force_sig() Change oom_kill_task() to use do_send_sig_info(SEND_SIG_FORCED) instead of force_sig(SIGKILL). With the recent changes we do not need force_ to kill the CLONE_NEWPID tasks. And this is more correct. force_sig() can race with the exiting thread even if oom_kill_task() checks p->mm != NULL, while do_send_sig_info(group => true) kille the whole process. Signed-off-by: Oleg Nesterov Cc: Tejun Heo Cc: Anton Vorontsov Cc: "Eric W. Biederman" Cc: KOSAKI Motohiro Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 4198e00..46bf2ed5 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -521,11 +521,11 @@ static void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, pr_err("Kill process %d (%s) sharing same memory\n", task_pid_nr(p), p->comm); task_unlock(p); - force_sig(SIGKILL, p); + do_send_sig_info(SIGKILL, SEND_SIG_FORCED, p, true); } set_tsk_thread_flag(victim, TIF_MEMDIE); - force_sig(SIGKILL, victim); + do_send_sig_info(SIGKILL, SEND_SIG_FORCED, victim, true); } #undef K -- cgit v0.10.2 From a02d6fd643cbd4c559113b35b31d3b04e4ec60c7 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:46 -0700 Subject: signal: zap_pid_ns_processes: s/SEND_SIG_NOINFO/SEND_SIG_FORCED/ Change zap_pid_ns_processes() to use SEND_SIG_FORCED, it looks more clear compared to SEND_SIG_NOINFO which relies on from_ancestor_ns logic send_signal(). It is also more efficient if we need to kill a lot of tasks because it doesn't alloc sigqueue. While at it, add the __fatal_signal_pending(task) check as a minor optimization. Signed-off-by: Oleg Nesterov Cc: Tejun Heo Cc: Anton Vorontsov Cc: "Eric W. Biederman" Cc: KOSAKI Motohiro Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index a896839..17b2328 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -168,13 +168,9 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns) while (nr > 0) { rcu_read_lock(); - /* - * Any nested-container's init processes won't ignore the - * SEND_SIG_NOINFO signal, see send_signal()->si_fromuser(). - */ task = pid_task(find_vpid(nr), PIDTYPE_PID); - if (task) - send_sig_info(SIGKILL, SEND_SIG_NOINFO, task); + if (task && !__fatal_signal_pending(task)) + send_sig_info(SIGKILL, SEND_SIG_FORCED, task); rcu_read_unlock(); -- cgit v0.10.2 From 70834d3070c3f3015ab5c05176d54bd4a0100546 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:46 -0700 Subject: usermodehelper: use UMH_WAIT_PROC consistently A few call_usermodehelper() callers use the hardcoded constant instead of the proper UMH_WAIT_PROC, fix them. Reported-by: Tetsuo Handa Signed-off-by: Oleg Nesterov Cc: Lars Ellenberg Cc: Greg Kroah-Hartman Cc: Michal Januszewski Cc: Florian Tobias Schandinat Cc: Kentaro Takeda Cc: Tetsuo Handa Cc: James Morris Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index e09f9ce..abfaaca 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -179,7 +179,7 @@ int drbd_khelper(struct drbd_conf *mdev, char *cmd) dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); drbd_bcast_ev_helper(mdev, cmd); - ret = call_usermodehelper(usermode_helper, argv, envp, 1); + ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC); if (ret) dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", usermode_helper, cmd, mb, diff --git a/drivers/staging/rtl8187se/r8180_core.c b/drivers/staging/rtl8187se/r8180_core.c index e4ade55..4fe52f6 100644 --- a/drivers/staging/rtl8187se/r8180_core.c +++ b/drivers/staging/rtl8187se/r8180_core.c @@ -4159,7 +4159,7 @@ void GPIOChangeRFWorkItemCallBack(struct work_struct *work) argv[0] = RadioPowerPath; argv[2] = NULL; - call_usermodehelper(RadioPowerPath, argv, envp, 1); + call_usermodehelper(RadioPowerPath, argv, envp, UMH_WAIT_PROC); } } diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_dm.c b/drivers/staging/rtl8192e/rtl8192e/rtl_dm.c index a7fa9aa..f026b71 100644 --- a/drivers/staging/rtl8192e/rtl8192e/rtl_dm.c +++ b/drivers/staging/rtl8192e/rtl8192e/rtl_dm.c @@ -208,7 +208,7 @@ static void dm_check_ac_dc_power(struct net_device *dev) if (priv->rtllib->state != RTLLIB_LINKED) return; - call_usermodehelper(ac_dc_check_script_path, argv, envp, 1); + call_usermodehelper(ac_dc_check_script_path, argv, envp, UMH_WAIT_PROC); return; }; @@ -2296,7 +2296,7 @@ void dm_CheckRfCtrlGPIO(void *data) argv[0] = RadioPowerPath; argv[2] = NULL; - call_usermodehelper(RadioPowerPath, argv, envp, 1); + call_usermodehelper(RadioPowerPath, argv, envp, UMH_WAIT_PROC); } } diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c index 9db3de3..260cca7 100644 --- a/drivers/video/uvesafb.c +++ b/drivers/video/uvesafb.c @@ -121,7 +121,7 @@ static int uvesafb_helper_start(void) NULL, }; - return call_usermodehelper(v86d_path, argv, envp, 1); + return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC); } /* diff --git a/security/tomoyo/load_policy.c b/security/tomoyo/load_policy.c index 6797540..078fac0 100644 --- a/security/tomoyo/load_policy.c +++ b/security/tomoyo/load_policy.c @@ -102,7 +102,7 @@ void tomoyo_load_policy(const char *filename) envp[0] = "HOME=/"; envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; envp[2] = NULL; - call_usermodehelper(argv[0], argv, envp, 1); + call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC); tomoyo_check_profile(); } -- cgit v0.10.2 From b3449922502f5a161ee2b5022a33aec8472fbf18 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:47 -0700 Subject: usermodehelper: introduce umh_complete(sub_info) Preparation. Add the new trivial helper, umh_complete(). Currently it simply does complete(sub_info->complete). Signed-off-by: Oleg Nesterov Cc: Tetsuo Handa Cc: Rusty Russell Cc: Tejun Heo Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/kmod.c b/kernel/kmod.c index a0a8854..8ea2594 100644 --- a/kernel/kmod.c +++ b/kernel/kmod.c @@ -199,6 +199,11 @@ void call_usermodehelper_freeinfo(struct subprocess_info *info) } EXPORT_SYMBOL(call_usermodehelper_freeinfo); +static void umh_complete(struct subprocess_info *sub_info) +{ + complete(sub_info->complete); +} + /* Keventd can't block, but this (a child) can. */ static int wait_for_helper(void *data) { @@ -235,7 +240,7 @@ static int wait_for_helper(void *data) sub_info->retval = ret; } - complete(sub_info->complete); + umh_complete(sub_info); return 0; } @@ -269,7 +274,7 @@ static void __call_usermodehelper(struct work_struct *work) case UMH_WAIT_EXEC: if (pid < 0) sub_info->retval = pid; - complete(sub_info->complete); + umh_complete(sub_info); } } -- cgit v0.10.2 From d0bd587a80960d7ba7e0c8396e154028c9045c54 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:47 -0700 Subject: usermodehelper: implement UMH_KILLABLE Implement UMH_KILLABLE, should be used along with UMH_WAIT_EXEC/PROC. The caller must ensure that subprocess_info->path/etc can not go away until call_usermodehelper_freeinfo(). call_usermodehelper_exec(UMH_KILLABLE) does wait_for_completion_killable. If it fails, it uses xchg(&sub_info->complete, NULL) to serialize with umh_complete() which does the same xhcg() to access sub_info->complete. If call_usermodehelper_exec wins, it can safely return. umh_complete() should get NULL and call call_usermodehelper_freeinfo(). Otherwise we know that umh_complete() was already called, in this case call_usermodehelper_exec() falls back to wait_for_completion() which should succeed "very soon". Note: UMH_NO_WAIT == -1 but it obviously should not be used with UMH_KILLABLE. We delay the neccessary cleanup to simplify the back porting. Signed-off-by: Oleg Nesterov Cc: Tetsuo Handa Cc: Rusty Russell Cc: Tejun Heo Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/kmod.h b/include/linux/kmod.h index 722f477..1b598585 100644 --- a/include/linux/kmod.h +++ b/include/linux/kmod.h @@ -54,6 +54,8 @@ enum umh_wait { UMH_WAIT_PROC = 1, /* wait for the process to complete */ }; +#define UMH_KILLABLE 4 /* wait for EXEC/PROC killable */ + struct subprocess_info { struct work_struct work; struct completion *complete; diff --git a/kernel/kmod.c b/kernel/kmod.c index 8ea2594..f92f917 100644 --- a/kernel/kmod.c +++ b/kernel/kmod.c @@ -201,7 +201,15 @@ EXPORT_SYMBOL(call_usermodehelper_freeinfo); static void umh_complete(struct subprocess_info *sub_info) { - complete(sub_info->complete); + struct completion *comp = xchg(&sub_info->complete, NULL); + /* + * See call_usermodehelper_exec(). If xchg() returns NULL + * we own sub_info, the UMH_KILLABLE caller has gone away. + */ + if (comp) + complete(comp); + else + call_usermodehelper_freeinfo(sub_info); } /* Keventd can't block, but this (a child) can. */ @@ -252,6 +260,9 @@ static void __call_usermodehelper(struct work_struct *work) enum umh_wait wait = sub_info->wait; pid_t pid; + if (wait != UMH_NO_WAIT) + wait &= ~UMH_KILLABLE; + /* CLONE_VFORK: wait until the usermode helper has execve'd * successfully We need the data structures to stay around * until that is done. */ @@ -461,9 +472,21 @@ int call_usermodehelper_exec(struct subprocess_info *sub_info, queue_work(khelper_wq, &sub_info->work); if (wait == UMH_NO_WAIT) /* task has freed sub_info */ goto unlock; + + if (wait & UMH_KILLABLE) { + retval = wait_for_completion_killable(&done); + if (!retval) + goto wait_done; + + /* umh_complete() will see NULL and free sub_info */ + if (xchg(&sub_info->complete, NULL)) + goto unlock; + /* fallthrough, umh_complete() was already called */ + } + wait_for_completion(&done); +wait_done: retval = sub_info->retval; - out: call_usermodehelper_freeinfo(sub_info); unlock: -- cgit v0.10.2 From 9d944ef32e83405a07376f112e9f02161d3e9731 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:48 -0700 Subject: usermodehelper: kill umh_wait, renumber UMH_* constants No functional changes. It is not sane to use UMH_KILLABLE with enum umh_wait, but obviously we do not want another argument in call_usermodehelper_* helpers. Kill this enum, use the plain int. Signed-off-by: Oleg Nesterov Cc: Tetsuo Handa Cc: Rusty Russell Cc: Tejun Heo Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/include/linux/kmod.h b/include/linux/kmod.h index 1b598585..9efeae6 100644 --- a/include/linux/kmod.h +++ b/include/linux/kmod.h @@ -48,12 +48,9 @@ static inline int request_module_nowait(const char *name, ...) { return -ENOSYS; struct cred; struct file; -enum umh_wait { - UMH_NO_WAIT = -1, /* don't wait at all */ - UMH_WAIT_EXEC = 0, /* wait for the exec, but not the process */ - UMH_WAIT_PROC = 1, /* wait for the process to complete */ -}; - +#define UMH_NO_WAIT 0 /* don't wait at all */ +#define UMH_WAIT_EXEC 1 /* wait for the exec, but not the process */ +#define UMH_WAIT_PROC 2 /* wait for the process to complete */ #define UMH_KILLABLE 4 /* wait for EXEC/PROC killable */ struct subprocess_info { @@ -62,7 +59,7 @@ struct subprocess_info { char *path; char **argv; char **envp; - enum umh_wait wait; + int wait; int retval; int (*init)(struct subprocess_info *info, struct cred *new); void (*cleanup)(struct subprocess_info *info); @@ -80,15 +77,14 @@ void call_usermodehelper_setfns(struct subprocess_info *info, void *data); /* Actually execute the sub-process */ -int call_usermodehelper_exec(struct subprocess_info *info, enum umh_wait wait); +int call_usermodehelper_exec(struct subprocess_info *info, int wait); /* Free the subprocess_info. This is only needed if you're not going to call call_usermodehelper_exec */ void call_usermodehelper_freeinfo(struct subprocess_info *info); static inline int -call_usermodehelper_fns(char *path, char **argv, char **envp, - enum umh_wait wait, +call_usermodehelper_fns(char *path, char **argv, char **envp, int wait, int (*init)(struct subprocess_info *info, struct cred *new), void (*cleanup)(struct subprocess_info *), void *data) { @@ -106,7 +102,7 @@ call_usermodehelper_fns(char *path, char **argv, char **envp, } static inline int -call_usermodehelper(char *path, char **argv, char **envp, enum umh_wait wait) +call_usermodehelper(char *path, char **argv, char **envp, int wait) { return call_usermodehelper_fns(path, argv, envp, wait, NULL, NULL, NULL); diff --git a/kernel/kmod.c b/kernel/kmod.c index f92f917..8341de9 100644 --- a/kernel/kmod.c +++ b/kernel/kmod.c @@ -257,12 +257,9 @@ static void __call_usermodehelper(struct work_struct *work) { struct subprocess_info *sub_info = container_of(work, struct subprocess_info, work); - enum umh_wait wait = sub_info->wait; + int wait = sub_info->wait & ~UMH_KILLABLE; pid_t pid; - if (wait != UMH_NO_WAIT) - wait &= ~UMH_KILLABLE; - /* CLONE_VFORK: wait until the usermode helper has execve'd * successfully We need the data structures to stay around * until that is done. */ @@ -451,8 +448,7 @@ EXPORT_SYMBOL(call_usermodehelper_setfns); * asynchronously if wait is not set, and runs as a child of keventd. * (ie. it runs with full root capabilities). */ -int call_usermodehelper_exec(struct subprocess_info *sub_info, - enum umh_wait wait) +int call_usermodehelper_exec(struct subprocess_info *sub_info, int wait) { DECLARE_COMPLETION_ONSTACK(done); int retval = 0; diff --git a/security/keys/request_key.c b/security/keys/request_key.c index 8246532..cc37903 100644 --- a/security/keys/request_key.c +++ b/security/keys/request_key.c @@ -91,7 +91,7 @@ static void umh_keys_cleanup(struct subprocess_info *info) * Call a usermode helper with a specific session keyring. */ static int call_usermodehelper_keys(char *path, char **argv, char **envp, - struct key *session_keyring, enum umh_wait wait) + struct key *session_keyring, int wait) { gfp_t gfp_mask = (wait == UMH_NO_WAIT) ? GFP_ATOMIC : GFP_KERNEL; struct subprocess_info *info = -- cgit v0.10.2 From 5b9bd473e3b8a8c6c4ae99be475e6e9b27568555 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:49 -0700 Subject: usermodehelper: ____call_usermodehelper() doesn't need do_exit() Minor cleanup. ____call_usermodehelper() can simply return, no need to call do_exit() explicitely. Signed-off-by: Oleg Nesterov Cc: Tetsuo Handa Cc: Rusty Russell Cc: Tejun Heo Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/kmod.c b/kernel/kmod.c index 8341de9..685b246 100644 --- a/kernel/kmod.c +++ b/kernel/kmod.c @@ -188,7 +188,7 @@ static int ____call_usermodehelper(void *data) /* Exec failed? */ fail: sub_info->retval = retval; - do_exit(0); + return 0; } void call_usermodehelper_freeinfo(struct subprocess_info *info) -- cgit v0.10.2 From 3e63a93b987685f02421e18b2aa452d20553a88b Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:49 -0700 Subject: kmod: introduce call_modprobe() helper No functional changes. Move the call_usermodehelper code from __request_module() into the new simple helper, call_modprobe(). Signed-off-by: Oleg Nesterov Cc: Tetsuo Handa Cc: Rusty Russell Cc: Tejun Heo Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/kmod.c b/kernel/kmod.c index 685b246..56a29e8 100644 --- a/kernel/kmod.c +++ b/kernel/kmod.c @@ -60,6 +60,21 @@ static DECLARE_RWSEM(umhelper_sem); */ char modprobe_path[KMOD_PATH_LEN] = "/sbin/modprobe"; +static int call_modprobe(char *module_name, int wait) +{ + static char *envp[] = { + "HOME=/", + "TERM=linux", + "PATH=/sbin:/usr/sbin:/bin:/usr/bin", + NULL + }; + + char *argv[] = { modprobe_path, "-q", "--", module_name, NULL }; + + return call_usermodehelper_fns(modprobe_path, argv, envp, + wait, NULL, NULL, NULL); +} + /** * __request_module - try to load a kernel module * @wait: wait (or not) for the operation to complete @@ -81,11 +96,6 @@ int __request_module(bool wait, const char *fmt, ...) char module_name[MODULE_NAME_LEN]; unsigned int max_modprobes; int ret; - char *argv[] = { modprobe_path, "-q", "--", module_name, NULL }; - static char *envp[] = { "HOME=/", - "TERM=linux", - "PATH=/sbin:/usr/sbin:/bin:/usr/bin", - NULL }; static atomic_t kmod_concurrent = ATOMIC_INIT(0); #define MAX_KMOD_CONCURRENT 50 /* Completely arbitrary value - KAO */ static int kmod_loop_msg; @@ -128,9 +138,7 @@ int __request_module(bool wait, const char *fmt, ...) trace_module_request(module_name, wait, _RET_IP_); - ret = call_usermodehelper_fns(modprobe_path, argv, envp, - wait ? UMH_WAIT_PROC : UMH_WAIT_EXEC, - NULL, NULL, NULL); + ret = call_modprobe(module_name, wait ? UMH_WAIT_PROC : UMH_WAIT_EXEC); atomic_dec(&kmod_concurrent); return ret; -- cgit v0.10.2 From 1cc684ab75123efe7ff446eb821d44375ba8fa30 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 23 Mar 2012 15:02:50 -0700 Subject: kmod: make __request_module() killable As Tetsuo Handa pointed out, request_module() can stress the system while the oom-killed caller sleeps in TASK_UNINTERRUPTIBLE. The task T uses "almost all" memory, then it does something which triggers request_module(). Say, it can simply call sys_socket(). This in turn needs more memory and leads to OOM. oom-killer correctly chooses T and kills it, but this can't help because it sleeps in TASK_UNINTERRUPTIBLE and after that oom-killer becomes "disabled" by the TIF_MEMDIE task T. Make __request_module() killable. The only necessary change is that call_modprobe() should kmalloc argv and module_name, they can't live in the stack if we use UMH_KILLABLE. This memory is freed via call_usermodehelper_freeinfo()->cleanup. Reported-by: Tetsuo Handa Signed-off-by: Oleg Nesterov Cc: Rusty Russell Cc: Tejun Heo Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/kernel/kmod.c b/kernel/kmod.c index 56a29e8..957a7aa 100644 --- a/kernel/kmod.c +++ b/kernel/kmod.c @@ -60,6 +60,12 @@ static DECLARE_RWSEM(umhelper_sem); */ char modprobe_path[KMOD_PATH_LEN] = "/sbin/modprobe"; +static void free_modprobe_argv(struct subprocess_info *info) +{ + kfree(info->argv[3]); /* check call_modprobe() */ + kfree(info->argv); +} + static int call_modprobe(char *module_name, int wait) { static char *envp[] = { @@ -69,10 +75,26 @@ static int call_modprobe(char *module_name, int wait) NULL }; - char *argv[] = { modprobe_path, "-q", "--", module_name, NULL }; + char **argv = kmalloc(sizeof(char *[5]), GFP_KERNEL); + if (!argv) + goto out; + + module_name = kstrdup(module_name, GFP_KERNEL); + if (!module_name) + goto free_argv; + + argv[0] = modprobe_path; + argv[1] = "-q"; + argv[2] = "--"; + argv[3] = module_name; /* check free_modprobe_argv() */ + argv[4] = NULL; return call_usermodehelper_fns(modprobe_path, argv, envp, - wait, NULL, NULL, NULL); + wait | UMH_KILLABLE, NULL, free_modprobe_argv, NULL); +free_argv: + kfree(argv); +out: + return -ENOMEM; } /** -- cgit v0.10.2 From 909af768e88867016f427264ae39d27a57b6a8ed Mon Sep 17 00:00:00 2001 From: Jason Baron Date: Fri, 23 Mar 2012 15:02:51 -0700 Subject: coredump: remove VM_ALWAYSDUMP flag The motivation for this patchset was that I was looking at a way for a qemu-kvm process, to exclude the guest memory from its core dump, which can be quite large. There are already a number of filter flags in /proc//coredump_filter, however, these allow one to specify 'types' of kernel memory, not specific address ranges (which is needed in this case). Since there are no more vma flags available, the first patch eliminates the need for the 'VM_ALWAYSDUMP' flag. The flag is used internally by the kernel to mark vdso and vsyscall pages. However, it is simple enough to check if a vma covers a vdso or vsyscall page without the need for this flag. The second patch then replaces the 'VM_ALWAYSDUMP' flag with a new 'VM_NODUMP' flag, which can be set by userspace using new madvise flags: 'MADV_DONTDUMP', and unset via 'MADV_DODUMP'. The core dump filters continue to work the same as before unless 'MADV_DONTDUMP' is set on the region. The qemu code which implements this features is at: http://people.redhat.com/~jbaron/qemu-dump/qemu-dump.patch In my testing the qemu core dump shrunk from 383MB -> 13MB with this patch. I also believe that the 'MADV_DONTDUMP' flag might be useful for security sensitive apps, which might want to select which areas are dumped. This patch: The VM_ALWAYSDUMP flag is currently used by the coredump code to indicate that a vma is part of a vsyscall or vdso section. However, we can determine if a vma is in one these sections by checking it against the gate_vma and checking for a non-NULL return value from arch_vma_name(). Thus, freeing a valuable vma bit. Signed-off-by: Jason Baron Acked-by: Roland McGrath Cc: Chris Metcalf Cc: Avi Kivity Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index c2ae3cd..219e4ef 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -533,8 +533,7 @@ int vectors_user_mapping(void) struct mm_struct *mm = current->mm; return install_special_mapping(mm, 0xffff0000, PAGE_SIZE, VM_READ | VM_EXEC | - VM_MAYREAD | VM_MAYEXEC | - VM_ALWAYSDUMP | VM_RESERVED, + VM_MAYREAD | VM_MAYEXEC | VM_RESERVED, NULL); } diff --git a/arch/hexagon/kernel/vdso.c b/arch/hexagon/kernel/vdso.c index 16277c3..f212a45 100644 --- a/arch/hexagon/kernel/vdso.c +++ b/arch/hexagon/kernel/vdso.c @@ -78,8 +78,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) /* MAYWRITE to allow gdb to COW and set breakpoints. */ ret = install_special_mapping(mm, vdso_base, PAGE_SIZE, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, &vdso_page); if (ret) diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c index e5cdfd6..0f1af58 100644 --- a/arch/mips/kernel/vdso.c +++ b/arch/mips/kernel/vdso.c @@ -88,8 +88,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) ret = install_special_mapping(mm, addr, PAGE_SIZE, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, &vdso_page); if (ret) diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c index 7d14bb69..d36ee10 100644 --- a/arch/powerpc/kernel/vdso.c +++ b/arch/powerpc/kernel/vdso.c @@ -263,17 +263,11 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) * the "data" page of the vDSO or you'll stop getting kernel updates * and your nice userland gettimeofday will be totally dead. * It's fine to use that for setting breakpoints in the vDSO code - * pages though - * - * Make sure the vDSO gets into every core dump. - * Dumping its contents makes post-mortem fully interpretable later - * without matching up the same kernel and hardware config to see - * what PC values meant. + * pages though. */ rc = install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, vdso_pagelist); if (rc) { current->mm->context.vdso_base = 0; diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c index e704a99..9c80138 100644 --- a/arch/s390/kernel/vdso.c +++ b/arch/s390/kernel/vdso.c @@ -241,17 +241,11 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) * on the "data" page of the vDSO or you'll stop getting kernel * updates and your nice userland gettimeofday will be totally dead. * It's fine to use that for setting breakpoints in the vDSO code - * pages though - * - * Make sure the vDSO gets into every core dump. - * Dumping its contents makes post-mortem fully interpretable later - * without matching up the same kernel and hardware config to see - * what PC values meant. + * pages though. */ rc = install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, vdso_pagelist); if (rc) current->mm->context.vdso_base = 0; diff --git a/arch/sh/kernel/vsyscall/vsyscall.c b/arch/sh/kernel/vsyscall/vsyscall.c index 1d6d51a..5ca5797 100644 --- a/arch/sh/kernel/vsyscall/vsyscall.c +++ b/arch/sh/kernel/vsyscall/vsyscall.c @@ -73,8 +73,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) ret = install_special_mapping(mm, addr, PAGE_SIZE, VM_READ | VM_EXEC | - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | - VM_ALWAYSDUMP, + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC, syscall_pages); if (unlikely(ret)) goto up_fail; diff --git a/arch/tile/mm/elf.c b/arch/tile/mm/elf.c index 55e58e9..1a00fb6 100644 --- a/arch/tile/mm/elf.c +++ b/arch/tile/mm/elf.c @@ -117,17 +117,11 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, /* * MAYWRITE to allow gdb to COW and set breakpoints - * - * Make sure the vDSO gets into every core dump. Dumping its - * contents makes post-mortem fully interpretable later - * without matching up the same kernel and hardware config to - * see what PC values meant. */ vdso_base = VDSO_BASE; retval = install_special_mapping(mm, vdso_base, PAGE_SIZE, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, vdso_pages); #ifndef __tilegx__ diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c index 52edc2b..432b429 100644 --- a/arch/unicore32/kernel/process.c +++ b/arch/unicore32/kernel/process.c @@ -381,7 +381,7 @@ int vectors_user_mapping(void) return install_special_mapping(mm, 0xffff0000, PAGE_SIZE, VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYEXEC | - VM_ALWAYSDUMP | VM_RESERVED, + VM_RESERVED, NULL); } diff --git a/arch/x86/um/mem_32.c b/arch/x86/um/mem_32.c index 639900a..f40281e 100644 --- a/arch/x86/um/mem_32.c +++ b/arch/x86/um/mem_32.c @@ -23,14 +23,6 @@ static int __init gate_vma_init(void) gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC; gate_vma.vm_page_prot = __P101; - /* - * Make sure the vDSO gets into every core dump. - * Dumping its contents makes post-mortem fully interpretable later - * without matching up the same kernel and hardware config to see - * what PC values meant. - */ - gate_vma.vm_flags |= VM_ALWAYSDUMP; - return 0; } __initcall(gate_vma_init); diff --git a/arch/x86/um/vdso/vma.c b/arch/x86/um/vdso/vma.c index 91f4ec9..af91901 100644 --- a/arch/x86/um/vdso/vma.c +++ b/arch/x86/um/vdso/vma.c @@ -64,8 +64,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) err = install_special_mapping(mm, um_vdso_addr, PAGE_SIZE, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, vdsop); up_write(&mm->mmap_sem); diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c index 468d591..a944020 100644 --- a/arch/x86/vdso/vdso32-setup.c +++ b/arch/x86/vdso/vdso32-setup.c @@ -250,13 +250,7 @@ static int __init gate_vma_init(void) gate_vma.vm_end = FIXADDR_USER_END; gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC; gate_vma.vm_page_prot = __P101; - /* - * Make sure the vDSO gets into every core dump. - * Dumping its contents makes post-mortem fully interpretable later - * without matching up the same kernel and hardware config to see - * what PC values meant. - */ - gate_vma.vm_flags |= VM_ALWAYSDUMP; + return 0; } @@ -343,17 +337,10 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) if (compat_uses_vma || !compat) { /* * MAYWRITE to allow gdb to COW and set breakpoints - * - * Make sure the vDSO gets into every core dump. - * Dumping its contents makes post-mortem fully - * interpretable later without matching up the same - * kernel and hardware config to see what PC values - * meant. */ ret = install_special_mapping(mm, addr, PAGE_SIZE, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, vdso32_pages); if (ret) diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c index 153407c..17e1827 100644 --- a/arch/x86/vdso/vma.c +++ b/arch/x86/vdso/vma.c @@ -124,8 +124,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) ret = install_special_mapping(mm, addr, vdso_size, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| - VM_ALWAYSDUMP, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, vdso_pages); if (ret) { current->mm->context.vdso = NULL; diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 81878b7..b64be5b 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1093,6 +1093,29 @@ out: */ /* + * The purpose of always_dump_vma() is to make sure that special kernel mappings + * that are useful for post-mortem analysis are included in every core dump. + * In that way we ensure that the core dump is fully interpretable later + * without matching up the same kernel and hardware config to see what PC values + * meant. These special mappings include - vDSO, vsyscall, and other + * architecture specific mappings + */ +static bool always_dump_vma(struct vm_area_struct *vma) +{ + /* Any vsyscall mappings? */ + if (vma == get_gate_vma(vma->vm_mm)) + return true; + /* + * arch_vma_name() returns non-NULL for special architecture mappings, + * such as vDSO sections. + */ + if (arch_vma_name(vma)) + return true; + + return false; +} + +/* * Decide what to dump of a segment, part, all or none. */ static unsigned long vma_dump_size(struct vm_area_struct *vma, @@ -1100,8 +1123,8 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma, { #define FILTER(type) (mm_flags & (1UL << MMF_DUMP_##type)) - /* The vma can be set up to tell us the answer directly. */ - if (vma->vm_flags & VM_ALWAYSDUMP) + /* always dump the vdso and vsyscall sections */ + if (always_dump_vma(vma)) goto whole; /* Hugetlb memory check */ diff --git a/include/linux/mm.h b/include/linux/mm.h index 7330742..2de2ddb 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -111,7 +111,6 @@ extern unsigned int kobjsize(const void *objp); #define VM_HUGEPAGE 0x01000000 /* MADV_HUGEPAGE marked this vma */ #endif #define VM_INSERTPAGE 0x02000000 /* The vma has had "vm_insert_page()" done on it */ -#define VM_ALWAYSDUMP 0x04000000 /* Always include in core dumps */ #define VM_CAN_NONLINEAR 0x08000000 /* Has ->fault & does nonlinear pages */ #define VM_MIXEDMAP 0x10000000 /* Can contain "struct page" and pure PFN pages */ diff --git a/mm/memory.c b/mm/memory.c index 3416b6e..6105f47 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3623,13 +3623,7 @@ static int __init gate_vma_init(void) gate_vma.vm_end = FIXADDR_USER_END; gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC; gate_vma.vm_page_prot = __P101; - /* - * Make sure the vDSO gets into every core dump. - * Dumping its contents makes post-mortem fully interpretable later - * without matching up the same kernel and hardware config to see - * what PC values meant. - */ - gate_vma.vm_flags |= VM_ALWAYSDUMP; + return 0; } __initcall(gate_vma_init); -- cgit v0.10.2 From accb61fe7bb0f5c2a4102239e4981650f9048519 Mon Sep 17 00:00:00 2001 From: Jason Baron Date: Fri, 23 Mar 2012 15:02:51 -0700 Subject: coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP Since we no longer need the VM_ALWAYSDUMP flag, let's use the freed bit for 'VM_NODUMP' flag. The idea is is to add a new madvise() flag: MADV_DONTDUMP, which can be set by applications to specifically request memory regions which should not dump core. The specific application I have in mind is qemu: we can add a flag there that wouldn't dump all of guest memory when qemu dumps core. This flag might also be useful for security sensitive apps that want to absolutely make sure that parts of memory are not dumped. To clear the flag use: MADV_DODUMP. [akpm@linux-foundation.org: s/MADV_NODUMP/MADV_DONTDUMP/, s/MADV_CLEAR_NODUMP/MADV_DODUMP/, per Roland] [akpm@linux-foundation.org: fix up the architectures which broke] Signed-off-by: Jason Baron Acked-by: Roland McGrath Cc: Chris Metcalf Cc: Avi Kivity Cc: Ralf Baechle Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: "James E.J. Bottomley" Cc: Helge Deller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/alpha/include/asm/mman.h b/arch/alpha/include/asm/mman.h index 72db984..cbeb361 100644 --- a/arch/alpha/include/asm/mman.h +++ b/arch/alpha/include/asm/mman.h @@ -56,6 +56,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/arch/mips/include/asm/mman.h b/arch/mips/include/asm/mman.h index 785b4ea..46d3da0 100644 --- a/arch/mips/include/asm/mman.h +++ b/arch/mips/include/asm/mman.h @@ -80,6 +80,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/arch/parisc/include/asm/mman.h b/arch/parisc/include/asm/mman.h index f5b7bf5..12219eb 100644 --- a/arch/parisc/include/asm/mman.h +++ b/arch/parisc/include/asm/mman.h @@ -62,6 +62,10 @@ #define MADV_HUGEPAGE 67 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 68 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 69 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 70 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 #define MAP_VARIABLE 0 diff --git a/arch/xtensa/include/asm/mman.h b/arch/xtensa/include/asm/mman.h index 3078901..25bc6c1 100644 --- a/arch/xtensa/include/asm/mman.h +++ b/arch/xtensa/include/asm/mman.h @@ -86,6 +86,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index b64be5b..504b6eee 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1127,6 +1127,9 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma, if (always_dump_vma(vma)) goto whole; + if (vma->vm_flags & VM_NODUMP) + return 0; + /* Hugetlb memory check */ if (vma->vm_flags & VM_HUGETLB) { if ((vma->vm_flags & VM_SHARED) && FILTER(HUGETLB_SHARED)) diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h index 787abbb..d030d2c 100644 --- a/include/asm-generic/mman-common.h +++ b/include/asm-generic/mman-common.h @@ -48,6 +48,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/include/linux/mm.h b/include/linux/mm.h index 2de2ddb..a6fabdf 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -111,6 +111,7 @@ extern unsigned int kobjsize(const void *objp); #define VM_HUGEPAGE 0x01000000 /* MADV_HUGEPAGE marked this vma */ #endif #define VM_INSERTPAGE 0x02000000 /* The vma has had "vm_insert_page()" done on it */ +#define VM_NODUMP 0x04000000 /* Do not include in the core dump */ #define VM_CAN_NONLINEAR 0x08000000 /* Has ->fault & does nonlinear pages */ #define VM_MIXEDMAP 0x10000000 /* Can contain "struct page" and pure PFN pages */ diff --git a/mm/madvise.c b/mm/madvise.c index f5ab745..1ccbba5 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -65,6 +65,12 @@ static long madvise_behavior(struct vm_area_struct * vma, } new_flags &= ~VM_DONTCOPY; break; + case MADV_DONTDUMP: + new_flags |= VM_NODUMP; + break; + case MADV_DODUMP: + new_flags &= ~VM_NODUMP; + break; case MADV_MERGEABLE: case MADV_UNMERGEABLE: error = ksm_madvise(vma, start, end, behavior, &new_flags); @@ -293,6 +299,8 @@ madvise_behavior_valid(int behavior) case MADV_HUGEPAGE: case MADV_NOHUGEPAGE: #endif + case MADV_DONTDUMP: + case MADV_DODUMP: return 1; default: -- cgit v0.10.2 From b908243c549448fc0662f9cdd8d5cfe620fcdc31 Mon Sep 17 00:00:00 2001 From: Djalal Harouni Date: Fri, 23 Mar 2012 15:02:52 -0700 Subject: fs/proc/kcore.c: make get_sparsemem_vmemmap_info() static get_sparsemem_vmemmap_info() is only used inside fs/proc/kcore.c Signed-off-by: Djalal Harouni Reviewed-by: WANG Cong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index e5e69af..86c67ee 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -157,7 +157,8 @@ static int kcore_update_ram(void) #ifdef CONFIG_SPARSEMEM_VMEMMAP /* calculate vmemmap's address from given system ram pfn and register it */ -int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head) +static int +get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head) { unsigned long pfn = __pa(ent->addr) >> PAGE_SHIFT; unsigned long nr_pages = ent->size >> PAGE_SHIFT; @@ -189,7 +190,8 @@ int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head) } #else -int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head) +static int +get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head) { return 1; } -- cgit v0.10.2 From 59a32e2ce5eb809967cac4e718bc527beca83c59 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Fri, 23 Mar 2012 15:02:53 -0700 Subject: proc: speed up /proc/stat handling On a typical 16 cpus machine, "cat /proc/stat" gives more than 4096 bytes, and is slow : # strace -T -o /tmp/STRACE cat /proc/stat | wc -c 5826 # grep "cpu " /tmp/STRACE read(0, "cpu 1949310 19 2144714 12117253"..., 32768) = 5826 <0.001504> Thats partly because show_stat() must be called twice since initial buffer size is too small (4096 bytes for less than 32 possible cpus) Fix this by : 1) Taking into account nr_irqs in the initial buffer sizing. 2) Using ksize() to allow better filling of initial buffer. Signed-off-by: Eric Dumazet Cc: Glauber Costa Cc: Russell King - ARM Linux Cc: KAMEZAWA Hiroyuki Cc: Paul Turner Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/proc/stat.c b/fs/proc/stat.c index 121f77c..ac44611 100644 --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -157,11 +157,14 @@ static int show_stat(struct seq_file *p, void *v) static int stat_open(struct inode *inode, struct file *file) { - unsigned size = 4096 * (1 + num_possible_cpus() / 32); + unsigned size = 1024 + 128 * num_possible_cpus(); char *buf; struct seq_file *m; int res; + /* minimum size to display an interrupt count : 2 bytes */ + size += 2 * nr_irqs; + /* don't ask for more than the kmalloc() max size */ if (size > KMALLOC_MAX_SIZE) size = KMALLOC_MAX_SIZE; @@ -173,7 +176,7 @@ static int stat_open(struct inode *inode, struct file *file) if (!res) { m = file->private_data; m->buf = buf; - m->size = size; + m->size = ksize(buf); } else kfree(buf); return res; -- cgit v0.10.2 From 1ac101a5d675aca2426c5cd460c73fb95acb8391 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Fri, 23 Mar 2012 15:02:54 -0700 Subject: procfs: add num_to_str() to speed up /proc/stat == stat_check.py num = 0 with open("/proc/stat") as f: while num < 1000 : data = f.read() f.seek(0, 0) num = num + 1 == perf shows 20.39% stat_check.py [kernel.kallsyms] [k] format_decode 13.41% stat_check.py [kernel.kallsyms] [k] number 12.61% stat_check.py [kernel.kallsyms] [k] vsnprintf 10.85% stat_check.py [kernel.kallsyms] [k] memcpy 4.85% stat_check.py [kernel.kallsyms] [k] radix_tree_lookup 4.43% stat_check.py [kernel.kallsyms] [k] seq_printf This patch removes most of calls to vsnprintf() by adding num_to_str() and seq_print_decimal_ull(), which prints decimal numbers without rich functions provided by printf(). On my 8cpu box. == Before patch == [root@bluextal test]# time ./stat_check.py real 0m0.150s user 0m0.026s sys 0m0.121s == After patch == [root@bluextal test]# time ./stat_check.py real 0m0.055s user 0m0.022s sys 0m0.030s [akpm@linux-foundation.org: remove incorrect comment, use less statck in num_to_str(), move comment from .h to .c, simplify seq_put_decimal_ull()] [andrea@betterlinux.com: avoid breaking the ABI in /proc/stat] Signed-off-by: KAMEZAWA Hiroyuki Signed-off-by: Andrea Righi Cc: Eric Dumazet Cc: Glauber Costa Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Paul Turner Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/proc/stat.c b/fs/proc/stat.c index ac44611..6a0c62d 100644 --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -89,18 +89,19 @@ static int show_stat(struct seq_file *p, void *v) } sum += arch_irq_stat(); - seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu " - "%llu\n", - (unsigned long long)cputime64_to_clock_t(user), - (unsigned long long)cputime64_to_clock_t(nice), - (unsigned long long)cputime64_to_clock_t(system), - (unsigned long long)cputime64_to_clock_t(idle), - (unsigned long long)cputime64_to_clock_t(iowait), - (unsigned long long)cputime64_to_clock_t(irq), - (unsigned long long)cputime64_to_clock_t(softirq), - (unsigned long long)cputime64_to_clock_t(steal), - (unsigned long long)cputime64_to_clock_t(guest), - (unsigned long long)cputime64_to_clock_t(guest_nice)); + seq_puts(p, "cpu "); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice)); + seq_putc(p, '\n'); + for_each_online_cpu(i) { /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ user = kcpustat_cpu(i).cpustat[CPUTIME_USER]; @@ -113,26 +114,24 @@ static int show_stat(struct seq_file *p, void *v) steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL]; guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST]; guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE]; - seq_printf(p, - "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu " - "%llu\n", - i, - (unsigned long long)cputime64_to_clock_t(user), - (unsigned long long)cputime64_to_clock_t(nice), - (unsigned long long)cputime64_to_clock_t(system), - (unsigned long long)cputime64_to_clock_t(idle), - (unsigned long long)cputime64_to_clock_t(iowait), - (unsigned long long)cputime64_to_clock_t(irq), - (unsigned long long)cputime64_to_clock_t(softirq), - (unsigned long long)cputime64_to_clock_t(steal), - (unsigned long long)cputime64_to_clock_t(guest), - (unsigned long long)cputime64_to_clock_t(guest_nice)); + seq_printf(p, "cpu%d", i); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest)); + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice)); + seq_putc(p, '\n'); } seq_printf(p, "intr %llu", (unsigned long long)sum); /* sum again ? it could be updated? */ for_each_irq_nr(j) - seq_printf(p, " %u", kstat_irqs(j)); + seq_put_decimal_ull(p, ' ', kstat_irqs(j)); seq_printf(p, "\nctxt %llu\n" @@ -149,7 +148,7 @@ static int show_stat(struct seq_file *p, void *v) seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); for (i = 0; i < NR_SOFTIRQS; i++) - seq_printf(p, " %u", per_softirq_sums[i]); + seq_put_decimal_ull(p, ' ', per_softirq_sums[i]); seq_putc(p, '\n'); return 0; diff --git a/fs/seq_file.c b/fs/seq_file.c index aa242dc..7d19816 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -644,6 +644,39 @@ int seq_puts(struct seq_file *m, const char *s) } EXPORT_SYMBOL(seq_puts); +/* + * A helper routine for putting decimal numbers without rich format of printf(). + * only 'unsigned long long' is supported. + * This routine will put one byte delimiter + number into seq_file. + * This routine is very quick when you show lots of numbers. + * In usual cases, it will be better to use seq_printf(). It's easier to read. + */ +int seq_put_decimal_ull(struct seq_file *m, char delimiter, + unsigned long long num) +{ + int len; + + if (m->count + 2 >= m->size) /* we'll write 2 bytes at least */ + goto overflow; + + m->buf[m->count++] = delimiter; + + if (num < 10) { + m->buf[m->count++] = num + '0'; + return 0; + } + + len = num_to_str(m->buf + m->count, m->size - m->count, num); + if (!len) + goto overflow; + m->count += len; + return 0; +overflow: + m->count = m->size; + return -1; +} +EXPORT_SYMBOL(seq_put_decimal_ull); + /** * seq_write - write arbitrary data to buffer * @seq: seq_file identifying the buffer to which data should be written diff --git a/include/linux/kernel.h b/include/linux/kernel.h index f2085b5..3e140ad 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -312,6 +312,8 @@ extern long long simple_strtoll(const char *,char **,unsigned int); #define strict_strtoull kstrtoull #define strict_strtoll kstrtoll +extern int num_to_str(char *buf, int size, unsigned long long num); + /* lib/printf utilities */ extern __printf(2, 3) int sprintf(char *buf, const char * fmt, ...); diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 44f1514..5bba42c 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -121,9 +121,10 @@ int single_release(struct inode *, struct file *); void *__seq_open_private(struct file *, const struct seq_operations *, int); int seq_open_private(struct file *, const struct seq_operations *, int); int seq_release_private(struct inode *, struct file *); +int seq_put_decimal_ull(struct seq_file *m, char delimiter, + unsigned long long num); #define SEQ_START_TOKEN ((void *)1) - /* * Helpers for iteration over list_head-s in seq_files */ diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 38e612e..385c402 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -212,6 +212,26 @@ char *put_dec(char *buf, unsigned long long num) } } +/* + * Convert passed number to decimal string. + * Returns the length of string. On buffer overflow, returns 0. + * + * If speed is not important, use snprintf(). It's easy to read the code. + */ +int num_to_str(char *buf, int size, unsigned long long num) +{ + char tmp[21]; /* Enough for 2^64 in decimal */ + int idx, len; + + len = put_dec(tmp, num) - tmp; + + if (len > size) + return 0; + for (idx = 0; idx < len; ++idx) + buf[idx] = tmp[len - idx - 1]; + return len; +} + #define ZEROPAD 1 /* pad with zero */ #define SIGN 2 /* unsigned/signed long */ #define PLUS 4 /* show plus */ -- cgit v0.10.2 From bda7bad62bc4c4e0783348e8db51abe094153c56 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Fri, 23 Mar 2012 15:02:54 -0700 Subject: procfs: speed up /proc/pid/stat, statm Process accounting applications as top, ps visit some files under /proc/. With seq_put_decimal_ull(), we can optimize /proc//stat and /proc//statm files. This patch adds - seq_put_decimal_ll() for signed values. - allow delimiter == 0. - convert seq_printf() to seq_put_decimal_ull/ll in /proc/stat, statm. Test result on a system with 2000+ procs. Before patch: [kamezawa@bluextal test]$ top -b -n 1 | wc -l 2223 [kamezawa@bluextal test]$ time top -b -n 1 > /dev/null real 0m0.675s user 0m0.044s sys 0m0.121s [kamezawa@bluextal test]$ time ps -elf > /dev/null real 0m0.236s user 0m0.056s sys 0m0.176s After patch: kamezawa@bluextal ~]$ time top -b -n 1 > /dev/null real 0m0.657s user 0m0.052s sys 0m0.100s [kamezawa@bluextal ~]$ time ps -elf > /dev/null real 0m0.198s user 0m0.050s sys 0m0.145s Considering top, ps tend to scan /proc periodically, this will reduce cpu consumption by top/ps to some extent. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: KAMEZAWA Hiroyuki Cc: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/proc/array.c b/fs/proc/array.c index c602b8d..fbb53c2 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -462,59 +462,56 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, /* convert nsec -> ticks */ start_time = nsec_to_clock_t(start_time); - seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \ -%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \ -%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld %lu %lu %lu\n", - pid_nr_ns(pid, ns), - tcomm, - state, - ppid, - pgid, - sid, - tty_nr, - tty_pgrp, - task->flags, - min_flt, - cmin_flt, - maj_flt, - cmaj_flt, - cputime_to_clock_t(utime), - cputime_to_clock_t(stime), - cputime_to_clock_t(cutime), - cputime_to_clock_t(cstime), - priority, - nice, - num_threads, - start_time, - vsize, - mm ? get_mm_rss(mm) : 0, - rsslim, - mm ? (permitted ? mm->start_code : 1) : 0, - mm ? (permitted ? mm->end_code : 1) : 0, - (permitted && mm) ? mm->start_stack : 0, - esp, - eip, - /* The signal information here is obsolete. - * It must be decimal for Linux 2.0 compatibility. - * Use /proc/#/status for real-time signals. - */ - task->pending.signal.sig[0] & 0x7fffffffUL, - task->blocked.sig[0] & 0x7fffffffUL, - sigign .sig[0] & 0x7fffffffUL, - sigcatch .sig[0] & 0x7fffffffUL, - wchan, - 0UL, - 0UL, - task->exit_signal, - task_cpu(task), - task->rt_priority, - task->policy, - (unsigned long long)delayacct_blkio_ticks(task), - cputime_to_clock_t(gtime), - cputime_to_clock_t(cgtime), - (mm && permitted) ? mm->start_data : 0, - (mm && permitted) ? mm->end_data : 0, - (mm && permitted) ? mm->start_brk : 0); + seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state); + seq_put_decimal_ll(m, ' ', ppid); + seq_put_decimal_ll(m, ' ', pgid); + seq_put_decimal_ll(m, ' ', sid); + seq_put_decimal_ll(m, ' ', tty_nr); + seq_put_decimal_ll(m, ' ', tty_pgrp); + seq_put_decimal_ull(m, ' ', task->flags); + seq_put_decimal_ull(m, ' ', min_flt); + seq_put_decimal_ull(m, ' ', cmin_flt); + seq_put_decimal_ull(m, ' ', maj_flt); + seq_put_decimal_ull(m, ' ', cmaj_flt); + seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime)); + seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime)); + seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime)); + seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime)); + seq_put_decimal_ll(m, ' ', priority); + seq_put_decimal_ll(m, ' ', nice); + seq_put_decimal_ll(m, ' ', num_threads); + seq_put_decimal_ull(m, ' ', 0); + seq_put_decimal_ull(m, ' ', start_time); + seq_put_decimal_ull(m, ' ', vsize); + seq_put_decimal_ll(m, ' ', mm ? get_mm_rss(mm) : 0); + seq_put_decimal_ull(m, ' ', rsslim); + seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0); + seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0); + seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0); + seq_put_decimal_ull(m, ' ', esp); + seq_put_decimal_ull(m, ' ', eip); + /* The signal information here is obsolete. + * It must be decimal for Linux 2.0 compatibility. + * Use /proc/#/status for real-time signals. + */ + seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL); + seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL); + seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL); + seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL); + seq_put_decimal_ull(m, ' ', wchan); + seq_put_decimal_ull(m, ' ', 0); + seq_put_decimal_ull(m, ' ', 0); + seq_put_decimal_ll(m, ' ', task->exit_signal); + seq_put_decimal_ll(m, ' ', task_cpu(task)); + seq_put_decimal_ull(m, ' ', task->rt_priority); + seq_put_decimal_ull(m, ' ', task->policy); + seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task)); + seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime)); + seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime)); + seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_data : 0); + seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->end_data : 0); + seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_brk : 0); + seq_putc(m, '\n'); if (mm) mmput(mm); return 0; @@ -542,8 +539,20 @@ int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, size = task_statm(mm, &shared, &text, &data, &resident); mmput(mm); } - seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", - size, resident, shared, text, data); + /* + * For quick read, open code by putting numbers directly + * expected format is + * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", + * size, resident, shared, text, data); + */ + seq_put_decimal_ull(m, 0, size); + seq_put_decimal_ull(m, ' ', resident); + seq_put_decimal_ull(m, ' ', shared); + seq_put_decimal_ull(m, ' ', text); + seq_put_decimal_ull(m, ' ', 0); + seq_put_decimal_ull(m, ' ', text); + seq_put_decimal_ull(m, ' ', 0); + seq_putc(m, '\n'); return 0; } diff --git a/fs/seq_file.c b/fs/seq_file.c index 7d19816..55c293f 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -659,7 +659,8 @@ int seq_put_decimal_ull(struct seq_file *m, char delimiter, if (m->count + 2 >= m->size) /* we'll write 2 bytes at least */ goto overflow; - m->buf[m->count++] = delimiter; + if (delimiter) + m->buf[m->count++] = delimiter; if (num < 10) { m->buf[m->count++] = num + '0'; @@ -677,6 +678,24 @@ overflow: } EXPORT_SYMBOL(seq_put_decimal_ull); +int seq_put_decimal_ll(struct seq_file *m, char delimiter, + long long num) +{ + if (num < 0) { + if (m->count + 3 >= m->size) { + m->count = m->size; + return -1; + } + if (delimiter) + m->buf[m->count++] = delimiter; + num = -num; + delimiter = '-'; + } + return seq_put_decimal_ull(m, delimiter, num); + +} +EXPORT_SYMBOL(seq_put_decimal_ll); + /** * seq_write - write arbitrary data to buffer * @seq: seq_file identifying the buffer to which data should be written diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 5bba42c..54e5ae7 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -123,6 +123,8 @@ int seq_open_private(struct file *, const struct seq_operations *, int); int seq_release_private(struct inode *, struct file *); int seq_put_decimal_ull(struct seq_file *m, char delimiter, unsigned long long num); +int seq_put_decimal_ll(struct seq_file *m, char delimiter, + long long num); #define SEQ_START_TOKEN ((void *)1) /* -- cgit v0.10.2 From 1b26c9b334044cff6d1d2698f2be41bc7d9a0864 Mon Sep 17 00:00:00 2001 From: Pravin B Shelar Date: Fri, 23 Mar 2012 15:02:55 -0700 Subject: proc-ns: use d_set_d_op() API to set dentry ops in proc_ns_instantiate(). The namespace cleanup path leaks a dentry which holds a reference count on a network namespace. Keeping that network namespace from being freed when the last user goes away. Leaving things like vlan devices in the leaked network namespace. If you use ip netns add for much real work this problem becomes apparent pretty quickly. It light testing the problem hides because frequently you simply don't notice the leak. Use d_set_d_op() so that DCACHE_OP_* flags are set correctly. This issue exists back to 3.0. Acked-by: "Eric W. Biederman" Reported-by: Justin Pettit Signed-off-by: Pravin B Shelar Signed-off-by: Jesse Gross Cc: David Miller Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index 27da860..3551f1f 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -53,7 +53,7 @@ static struct dentry *proc_ns_instantiate(struct inode *dir, ei->ns_ops = ns_ops; ei->ns = ns; - dentry->d_op = &pid_dentry_operations; + d_set_d_op(dentry, &pid_dentry_operations); d_add(dentry, inode); /* Close the race of the process dying before we return the dentry */ if (pid_revalidate(dentry, NULL)) -- cgit v0.10.2 From e075f59152890ffd7e3d704afc997dd686c8a781 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Fri, 23 Mar 2012 15:02:55 -0700 Subject: seq_file: add seq_set_overflow(), seq_overflow() It is undocumented but a seq_file's overflow state is indicated by m->count == m->size. Add seq_set_overflow() and seq_overflow() to set/check overflow status explicitly. Based on an idea from Eric Dumazet. [akpm@linux-foundation.org: tweak code comment] Signed-off-by: KAMEZAWA Hiroyuki Cc: Eric Dumazet Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/fs/seq_file.c b/fs/seq_file.c index 55c293f..46cfb06 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -13,6 +13,22 @@ #include #include + +/* + * seq_files have a buffer which can may overflow. When this happens a larger + * buffer is reallocated and all the data will be printed again. + * The overflow state is true when m->count == m->size. + */ +static bool seq_overflow(struct seq_file *m) +{ + return m->count == m->size; +} + +static void seq_set_overflow(struct seq_file *m) +{ + m->count = m->size; +} + /** * seq_open - initialize sequential file * @file: file we initialize @@ -92,7 +108,7 @@ static int traverse(struct seq_file *m, loff_t offset) error = 0; m->count = 0; } - if (m->count == m->size) + if (seq_overflow(m)) goto Eoverflow; if (pos + m->count > offset) { m->from = offset - pos; @@ -234,7 +250,7 @@ Fill: break; } err = m->op->show(m, p); - if (m->count == m->size || err) { + if (seq_overflow(m) || err) { m->count = offs; if (likely(err <= 0)) break; @@ -361,7 +377,7 @@ int seq_escape(struct seq_file *m, const char *s, const char *esc) *p++ = '0' + (c & 07); continue; } - m->count = m->size; + seq_set_overflow(m); return -1; } m->count = p - m->buf; @@ -383,7 +399,7 @@ int seq_printf(struct seq_file *m, const char *f, ...) return 0; } } - m->count = m->size; + seq_set_overflow(m); return -1; } EXPORT_SYMBOL(seq_printf); @@ -512,7 +528,7 @@ int seq_bitmap(struct seq_file *m, const unsigned long *bits, return 0; } } - m->count = m->size; + seq_set_overflow(m); return -1; } EXPORT_SYMBOL(seq_bitmap); @@ -528,7 +544,7 @@ int seq_bitmap_list(struct seq_file *m, const unsigned long *bits, return 0; } } - m->count = m->size; + seq_set_overflow(m); return -1; } EXPORT_SYMBOL(seq_bitmap_list); @@ -639,7 +655,7 @@ int seq_puts(struct seq_file *m, const char *s) m->count += len; return 0; } - m->count = m->size; + seq_set_overflow(m); return -1; } EXPORT_SYMBOL(seq_puts); @@ -673,7 +689,7 @@ int seq_put_decimal_ull(struct seq_file *m, char delimiter, m->count += len; return 0; overflow: - m->count = m->size; + seq_set_overflow(m); return -1; } EXPORT_SYMBOL(seq_put_decimal_ull); @@ -683,7 +699,7 @@ int seq_put_decimal_ll(struct seq_file *m, char delimiter, { if (num < 0) { if (m->count + 3 >= m->size) { - m->count = m->size; + seq_set_overflow(m); return -1; } if (delimiter) @@ -711,7 +727,7 @@ int seq_write(struct seq_file *seq, const void *data, size_t len) seq->count += len; return 0; } - seq->count = seq->size; + seq_set_overflow(seq); return -1; } EXPORT_SYMBOL(seq_write); -- cgit v0.10.2