diff options
Diffstat (limited to 'arch/tile')
| -rw-r--r-- | arch/tile/Kconfig | 26 | ||||
| -rw-r--r-- | arch/tile/include/asm/atomic.h | 21 | ||||
| -rw-r--r-- | arch/tile/include/asm/hugetlb.h | 1 | ||||
| -rw-r--r-- | arch/tile/include/asm/irqflags.h | 10 | ||||
| -rw-r--r-- | arch/tile/include/asm/ptrace.h | 3 | ||||
| -rw-r--r-- | arch/tile/include/asm/syscall.h | 6 | ||||
| -rw-r--r-- | arch/tile/include/asm/syscalls.h | 6 | ||||
| -rw-r--r-- | arch/tile/include/asm/thread_info.h | 10 | ||||
| -rw-r--r-- | arch/tile/include/asm/uaccess.h | 7 | ||||
| -rw-r--r-- | arch/tile/include/uapi/asm/unistd.h | 2 | ||||
| -rw-r--r-- | arch/tile/kernel/compat.c | 6 | ||||
| -rw-r--r-- | arch/tile/kernel/early_printk.c | 27 | ||||
| -rw-r--r-- | arch/tile/kernel/intvec_32.S | 10 | ||||
| -rw-r--r-- | arch/tile/kernel/intvec_64.S | 24 | ||||
| -rw-r--r-- | arch/tile/kernel/process.c | 68 | ||||
| -rw-r--r-- | arch/tile/kernel/ptrace.c | 39 | ||||
| -rw-r--r-- | arch/tile/kernel/setup.c | 25 | ||||
| -rw-r--r-- | arch/tile/kernel/smpboot.c | 4 | ||||
| -rw-r--r-- | arch/tile/kernel/time.c | 6 | ||||
| -rw-r--r-- | arch/tile/lib/uaccess.c | 8 | ||||
| -rw-r--r-- | arch/tile/mm/pgtable.c | 7 |
21 files changed, 139 insertions, 177 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 25877ae..5b6a40d 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -16,12 +16,15 @@ config TILE select GENERIC_PENDING_IRQ if SMP select GENERIC_IRQ_SHOW select HAVE_DEBUG_BUGVERBOSE - select HAVE_SYSCALL_WRAPPERS if TILEGX select VIRT_TO_BUS select SYS_HYPERVISOR + select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA + select HAVE_ARCH_TRACEHOOK + select HAVE_SYSCALL_TRACEPOINTS + select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE # FIXME: investigate whether we need/want these options. # select HAVE_IOREMAP_PROT @@ -40,9 +43,6 @@ config MMU config GENERIC_CSUM def_bool y -config SEMAPHORE_SLEEPERS - def_bool y - config HAVE_ARCH_ALLOC_REMAP def_bool y @@ -67,12 +67,6 @@ config HUGETLB_SUPER_PAGES config RWSEM_GENERIC_SPINLOCK def_bool y -# We have a very flat architecture from a migration point of view, -# so save boot time by presetting this (particularly useful on tile-sim). -config DEFAULT_MIGRATION_COST - int - default "10000000" - # We only support gcc 4.4 and above, so this should work. config ARCH_SUPPORTS_OPTIMIZED_INLINING def_bool y @@ -114,13 +108,6 @@ config STRICT_DEVMEM config SMP def_bool y -# Allow checking for compile-time determined overflow errors in -# copy_from_user(). There are still unprovable places in the -# generic code as of 2.6.34, so this option is not really compatible -# with -Werror, which is more useful in general. -config DEBUG_COPY_FROM_USER - def_bool n - config HVC_TILE depends on TTY select HVC_DRIVER @@ -420,11 +407,6 @@ endmenu menu "Executable file formats" -# only elf supported -config KCORE_ELF - def_bool y - depends on PROC_FS - source "fs/Kconfig.binfmt" endmenu diff --git a/arch/tile/include/asm/atomic.h b/arch/tile/include/asm/atomic.h index f246142..e71387a 100644 --- a/arch/tile/include/asm/atomic.h +++ b/arch/tile/include/asm/atomic.h @@ -131,4 +131,25 @@ static inline int atomic_read(const atomic_t *v) #include <asm/atomic_64.h> #endif +#ifndef __ASSEMBLY__ + +static inline long long atomic64_dec_if_positive(atomic64_t *v) +{ + long long c, old, dec; + + c = atomic64_read(v); + for (;;) { + dec = c - 1; + if (unlikely(dec < 0)) + break; + old = atomic64_cmpxchg((v), c, dec); + if (likely(old == c)) + break; + c = old; + } + return dec; +} + +#endif /* __ASSEMBLY__ */ + #endif /* _ASM_TILE_ATOMIC_H */ diff --git a/arch/tile/include/asm/hugetlb.h b/arch/tile/include/asm/hugetlb.h index 0f885af..3257733 100644 --- a/arch/tile/include/asm/hugetlb.h +++ b/arch/tile/include/asm/hugetlb.h @@ -16,6 +16,7 @@ #define _ASM_TILE_HUGETLB_H #include <asm/page.h> +#include <asm-generic/hugetlb.h> static inline int is_hugepage_only_range(struct mm_struct *mm, diff --git a/arch/tile/include/asm/irqflags.h b/arch/tile/include/asm/irqflags.h index 241c0bb..c96f9bb 100644 --- a/arch/tile/include/asm/irqflags.h +++ b/arch/tile/include/asm/irqflags.h @@ -40,7 +40,15 @@ #include <asm/percpu.h> #include <arch/spr_def.h> -/* Set and clear kernel interrupt masks. */ +/* + * Set and clear kernel interrupt masks. + * + * NOTE: __insn_mtspr() is a compiler builtin marked as a memory + * clobber. We rely on it being equivalent to a compiler barrier in + * this code since arch_local_irq_save() and friends must act as + * compiler barriers. This compiler semantic is baked into enough + * places that the compiler will maintain it going forward. + */ #if CHIP_HAS_SPLIT_INTR_MASK() #if INT_PERF_COUNT < 32 || INT_AUX_PERF_COUNT < 32 || INT_MEM_ERROR >= 32 # error Fix assumptions about which word various interrupts are in diff --git a/arch/tile/include/asm/ptrace.h b/arch/tile/include/asm/ptrace.h index 2e83fc1..fd41226 100644 --- a/arch/tile/include/asm/ptrace.h +++ b/arch/tile/include/asm/ptrace.h @@ -44,7 +44,8 @@ typedef unsigned long pt_reg_t; struct pt_regs *get_pt_regs(struct pt_regs *); /* Trace the current syscall. */ -extern void do_syscall_trace(void); +extern int do_syscall_trace_enter(struct pt_regs *regs); +extern void do_syscall_trace_exit(struct pt_regs *regs); #define arch_has_single_step() (1) diff --git a/arch/tile/include/asm/syscall.h b/arch/tile/include/asm/syscall.h index d35e0dc..9644b88 100644 --- a/arch/tile/include/asm/syscall.h +++ b/arch/tile/include/asm/syscall.h @@ -22,6 +22,12 @@ #include <linux/err.h> #include <arch/abi.h> +/* The array of function pointers for syscalls. */ +extern void *sys_call_table[]; +#ifdef CONFIG_COMPAT +extern void *compat_sys_call_table[]; +#endif + /* * Only the low 32 bits of orig_r0 are meaningful, so we return int. * This importantly ignores the high bits on 64-bit, so comparisons diff --git a/arch/tile/include/asm/syscalls.h b/arch/tile/include/asm/syscalls.h index 78886e2..07b2984 100644 --- a/arch/tile/include/asm/syscalls.h +++ b/arch/tile/include/asm/syscalls.h @@ -24,12 +24,6 @@ #include <linux/types.h> #include <linux/compat.h> -/* The array of function pointers for syscalls. */ -extern void *sys_call_table[]; -#ifdef CONFIG_COMPAT -extern void *compat_sys_call_table[]; -#endif - /* * Note that by convention, any syscall which requires the current * register set takes an additional "struct pt_regs *" pointer; a diff --git a/arch/tile/include/asm/thread_info.h b/arch/tile/include/asm/thread_info.h index e9c670d..d1733de 100644 --- a/arch/tile/include/asm/thread_info.h +++ b/arch/tile/include/asm/thread_info.h @@ -124,6 +124,7 @@ extern void _cpu_idle(void); #define TIF_SECCOMP 6 /* secure computing */ #define TIF_MEMDIE 7 /* OOM killer at work */ #define TIF_NOTIFY_RESUME 8 /* callback before returning to user */ +#define TIF_SYSCALL_TRACEPOINT 9 /* syscall tracepoint instrumentation */ #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) @@ -134,12 +135,19 @@ extern void _cpu_idle(void); #define _TIF_SECCOMP (1<<TIF_SECCOMP) #define _TIF_MEMDIE (1<<TIF_MEMDIE) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) +#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) /* Work to do on any return to user space. */ #define _TIF_ALLWORK_MASK \ (_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SINGLESTEP|\ _TIF_ASYNC_TLB|_TIF_NOTIFY_RESUME) +/* Work to do at syscall entry. */ +#define _TIF_SYSCALL_ENTRY_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT) + +/* Work to do at syscall exit. */ +#define _TIF_SYSCALL_EXIT_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT) + /* * Thread-synchronous status. * @@ -153,8 +161,6 @@ extern void _cpu_idle(void); #define TS_POLLING 0x0004 /* in idle loop but not sleeping */ #define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal */ -#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING) - #ifndef __ASSEMBLY__ #define HAVE_SET_RESTORE_SIGMASK 1 static inline void set_restore_sigmask(void) diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h index 9ab078a..8a082bc 100644 --- a/arch/tile/include/asm/uaccess.h +++ b/arch/tile/include/asm/uaccess.h @@ -395,7 +395,12 @@ _copy_from_user(void *to, const void __user *from, unsigned long n) return n; } -#ifdef CONFIG_DEBUG_COPY_FROM_USER +#ifdef CONFIG_DEBUG_STRICT_USER_COPY_CHECKS +/* + * There are still unprovable places in the generic code as of 2.6.34, so this + * option is not really compatible with -Werror, which is more useful in + * general. + */ extern void copy_from_user_overflow(void) __compiletime_warning("copy_from_user() size is not provably correct"); diff --git a/arch/tile/include/uapi/asm/unistd.h b/arch/tile/include/uapi/asm/unistd.h index cd7b6dd..3866397 100644 --- a/arch/tile/include/uapi/asm/unistd.h +++ b/arch/tile/include/uapi/asm/unistd.h @@ -20,6 +20,8 @@ /* Use the standard ABI for syscalls. */ #include <asm-generic/unistd.h> +#define NR_syscalls __NR_syscalls + /* Additional Tilera-specific syscalls. */ #define __NR_cacheflush (__NR_arch_specific_syscall + 1) __SYSCALL(__NR_cacheflush, sys_cacheflush) diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c index 6ea4cdb..ed37841 100644 --- a/arch/tile/kernel/compat.c +++ b/arch/tile/kernel/compat.c @@ -56,12 +56,6 @@ COMPAT_SYSCALL_DEFINE6(pwrite64, unsigned int, fd, char __user *, ubuf, return sys_pwrite64(fd, ubuf, count, ((loff_t)high << 32) | low); } -COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, low, u32, high, - char __user *, buf, size_t, len) -{ - return sys_lookup_dcookie(((loff_t)high << 32) | low, buf, len); -} - COMPAT_SYSCALL_DEFINE6(sync_file_range2, int, fd, unsigned int, flags, u32, offset_lo, u32, offset_hi, u32, nbytes_lo, u32, nbytes_hi) diff --git a/arch/tile/kernel/early_printk.c b/arch/tile/kernel/early_printk.c index afb9c9a..34d72a1 100644 --- a/arch/tile/kernel/early_printk.c +++ b/arch/tile/kernel/early_printk.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/string.h> #include <linux/irqflags.h> +#include <linux/printk.h> #include <asm/setup.h> #include <hv/hypervisor.h> @@ -33,25 +34,8 @@ static struct console early_hv_console = { }; /* Direct interface for emergencies */ -static struct console *early_console = &early_hv_console; -static int early_console_initialized; static int early_console_complete; -static void early_vprintk(const char *fmt, va_list ap) -{ - char buf[512]; - int n = vscnprintf(buf, sizeof(buf), fmt, ap); - early_console->write(early_console, buf, n); -} - -void early_printk(const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - early_vprintk(fmt, ap); - va_end(ap); -} - void early_panic(const char *fmt, ...) { va_list ap; @@ -69,14 +53,13 @@ static int __initdata keep_early; static int __init setup_early_printk(char *str) { - if (early_console_initialized) + if (early_console) return 1; if (str != NULL && strncmp(str, "keep", 4) == 0) keep_early = 1; early_console = &early_hv_console; - early_console_initialized = 1; register_console(early_console); return 0; @@ -85,12 +68,12 @@ static int __init setup_early_printk(char *str) void __init disable_early_printk(void) { early_console_complete = 1; - if (!early_console_initialized || !early_console) + if (!early_console) return; if (!keep_early) { early_printk("disabling early console\n"); unregister_console(early_console); - early_console_initialized = 0; + early_console = NULL; } else { early_printk("keeping early console\n"); } @@ -98,7 +81,7 @@ void __init disable_early_printk(void) void warn_early_printk(void) { - if (early_console_complete || early_console_initialized) + if (early_console_complete || early_console) return; early_printk("\ Machine shutting down before console output is fully initialized.\n\ diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S index f212bf7..cb52d66 100644 --- a/arch/tile/kernel/intvec_32.S +++ b/arch/tile/kernel/intvec_32.S @@ -1201,7 +1201,10 @@ handle_syscall: lw r30, r31 andi r30, r30, _TIF_SYSCALL_TRACE bzt r30, .Lrestore_syscall_regs - jal do_syscall_trace + { + PTREGS_PTR(r0, PTREGS_OFFSET_BASE) + jal do_syscall_trace_enter + } FEEDBACK_REENTER(handle_syscall) /* @@ -1252,7 +1255,10 @@ handle_syscall: lw r30, r31 andi r30, r30, _TIF_SYSCALL_TRACE bzt r30, 1f - jal do_syscall_trace + { + PTREGS_PTR(r0, PTREGS_OFFSET_BASE) + jal do_syscall_trace_exit + } FEEDBACK_REENTER(handle_syscall) 1: { movei r30, 0 /* not an NMI */ diff --git a/arch/tile/kernel/intvec_64.S b/arch/tile/kernel/intvec_64.S index 4ea0809..85d4839 100644 --- a/arch/tile/kernel/intvec_64.S +++ b/arch/tile/kernel/intvec_64.S @@ -1000,13 +1000,19 @@ handle_syscall: /* Trace syscalls, if requested. */ addi r31, r31, THREAD_INFO_FLAGS_OFFSET - ld r30, r31 - andi r30, r30, _TIF_SYSCALL_TRACE + { + ld r30, r31 + moveli r32, _TIF_SYSCALL_ENTRY_WORK + } + and r30, r30, r32 { addi r30, r31, THREAD_INFO_STATUS_OFFSET - THREAD_INFO_FLAGS_OFFSET beqzt r30, .Lrestore_syscall_regs } - jal do_syscall_trace + { + PTREGS_PTR(r0, PTREGS_OFFSET_BASE) + jal do_syscall_trace_enter + } FEEDBACK_REENTER(handle_syscall) /* @@ -1071,13 +1077,19 @@ handle_syscall: FEEDBACK_REENTER(handle_syscall) /* Do syscall trace again, if requested. */ - ld r30, r31 - andi r0, r30, _TIF_SYSCALL_TRACE + { + ld r30, r31 + moveli r32, _TIF_SYSCALL_EXIT_WORK + } + and r0, r30, r32 { andi r0, r30, _TIF_SINGLESTEP beqzt r0, 1f } - jal do_syscall_trace + { + PTREGS_PTR(r0, PTREGS_OFFSET_BASE) + jal do_syscall_trace_exit + } FEEDBACK_REENTER(handle_syscall) andi r0, r30, _TIF_SINGLESTEP diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c index caf93ae..8ac3044 100644 --- a/arch/tile/kernel/process.c +++ b/arch/tile/kernel/process.c @@ -40,13 +40,11 @@ #include <arch/abi.h> #include <arch/sim_def.h> - /* * Use the (x86) "idle=poll" option to prefer low latency when leaving the * idle loop over low power while in the idle loop, e.g. if we have * one thread per core and we want to get threads out of futex waits fast. */ -static int no_idle_nap; static int __init idle_setup(char *str) { if (!str) @@ -54,64 +52,19 @@ static int __init idle_setup(char *str) if (!strcmp(str, "poll")) { pr_info("using polling idle threads.\n"); - no_idle_nap = 1; - } else if (!strcmp(str, "halt")) - no_idle_nap = 0; - else - return -1; - - return 0; + cpu_idle_poll_ctrl(true); + return 0; + } else if (!strcmp(str, "halt")) { + return 0; + } + return -1; } early_param("idle", idle_setup); -/* - * The idle thread. There's no useful work to be - * done, so just try to conserve power and have a - * low exit latency (ie sit in a loop waiting for - * somebody to say that they'd like to reschedule) - */ -void cpu_idle(void) +void arch_cpu_idle(void) { - int cpu = smp_processor_id(); - - - current_thread_info()->status |= TS_POLLING; - - if (no_idle_nap) { - while (1) { - while (!need_resched()) - cpu_relax(); - schedule(); - } - } - - /* endless idle loop with no priority at all */ - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - while (!need_resched()) { - if (cpu_is_offline(cpu)) - BUG(); /* no HOTPLUG_CPU */ - - local_irq_disable(); - __get_cpu_var(irq_stat).idle_timestamp = jiffies; - current_thread_info()->status &= ~TS_POLLING; - /* - * TS_POLLING-cleared state must be visible before we - * test NEED_RESCHED: - */ - smp_mb(); - - if (!need_resched()) - _cpu_idle(); - else - local_irq_enable(); - current_thread_info()->status |= TS_POLLING; - } - rcu_idle_exit(); - tick_nohz_idle_exit(); - schedule_preempt_disabled(); - } + __get_cpu_var(irq_stat).idle_timestamp = jiffies; + _cpu_idle(); } /* @@ -620,8 +573,7 @@ void show_regs(struct pt_regs *regs) int i; pr_err("\n"); - pr_err(" Pid: %d, comm: %20s, CPU: %d\n", - tsk->pid, tsk->comm, smp_processor_id()); + show_regs_print_info(KERN_ERR); #ifdef __tilegx__ for (i = 0; i < 51; i += 3) pr_err(" r%-2d: "REGFMT" r%-2d: "REGFMT" r%-2d: "REGFMT"\n", diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index 9835312..0f83ed4 100644 --- a/arch/tile/kernel/ptrace.c +++ b/arch/tile/kernel/ptrace.c @@ -21,9 +21,13 @@ #include <linux/uaccess.h> #include <linux/regset.h> #include <linux/elf.h> +#include <linux/tracehook.h> #include <asm/traps.h> #include <arch/chip.h> +#define CREATE_TRACE_POINTS +#include <trace/events/syscalls.h> + void user_enable_single_step(struct task_struct *child) { set_tsk_thread_flag(child, TIF_SINGLESTEP); @@ -246,29 +250,26 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, } #endif -void do_syscall_trace(void) +int do_syscall_trace_enter(struct pt_regs *regs) { - if (!test_thread_flag(TIF_SYSCALL_TRACE)) - return; + if (test_thread_flag(TIF_SYSCALL_TRACE)) { + if (tracehook_report_syscall_entry(regs)) + regs->regs[TREG_SYSCALL_NR] = -1; + } - if (!(current->ptrace & PT_PTRACED)) - return; + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, regs->regs[TREG_SYSCALL_NR]); - /* - * The 0x80 provides a way for the tracing parent to distinguish - * between a syscall stop and SIGTRAP delivery - */ - ptrace_notify(SIGTRAP|((current->ptrace & PT_TRACESYSGOOD) ? 0x80 : 0)); + return regs->regs[TREG_SYSCALL_NR]; +} - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; - } +void do_syscall_trace_exit(struct pt_regs *regs) +{ + if (test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall_exit(regs, 0); + + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, regs->regs[0]); } void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code) diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c index d1e15f7..7a5aa1a 100644 --- a/arch/tile/kernel/setup.c +++ b/arch/tile/kernel/setup.c @@ -1004,15 +1004,8 @@ void __cpuinit setup_cpu(int boot) #ifdef CONFIG_BLK_DEV_INITRD -/* - * Note that the kernel can potentially support other compression - * techniques than gz, though we don't do so by default. If we ever - * decide to do so we can either look for other filename extensions, - * or just allow a file with this name to be compressed with an - * arbitrary compressor (somewhat counterintuitively). - */ static int __initdata set_initramfs_file; -static char __initdata initramfs_file[128] = "initramfs.cpio.gz"; +static char __initdata initramfs_file[128] = "initramfs"; static int __init setup_initramfs_file(char *str) { @@ -1026,9 +1019,9 @@ static int __init setup_initramfs_file(char *str) early_param("initramfs_file", setup_initramfs_file); /* - * We look for an "initramfs.cpio.gz" file in the hvfs. - * If there is one, we allocate some memory for it and it will be - * unpacked to the initramfs. + * We look for a file called "initramfs" in the hvfs. If there is one, we + * allocate some memory for it and it will be unpacked to the initramfs. + * If it's compressed, the initd code will uncompress it first. */ static void __init load_hv_initrd(void) { @@ -1038,10 +1031,16 @@ static void __init load_hv_initrd(void) fd = hv_fs_findfile((HV_VirtAddr) initramfs_file); if (fd == HV_ENOENT) { - if (set_initramfs_file) + if (set_initramfs_file) { pr_warning("No such hvfs initramfs file '%s'\n", initramfs_file); - return; + return; + } else { + /* Try old backwards-compatible name. */ + fd = hv_fs_findfile((HV_VirtAddr)"initramfs.cpio.gz"); + if (fd == HV_ENOENT) + return; + } } BUG_ON(fd < 0); stat = hv_fs_fstat(fd); diff --git a/arch/tile/kernel/smpboot.c b/arch/tile/kernel/smpboot.c index e686c5a..44bab29 100644 --- a/arch/tile/kernel/smpboot.c +++ b/arch/tile/kernel/smpboot.c @@ -207,9 +207,7 @@ void __cpuinit online_secondary(void) /* Set up tile-timer clock-event device on this cpu */ setup_tile_timer(); - preempt_enable(); - - cpu_idle(); + cpu_startup_entry(CPUHP_ONLINE); } int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle) diff --git a/arch/tile/kernel/time.c b/arch/tile/kernel/time.c index f6f50f2a..5ac397e 100644 --- a/arch/tile/kernel/time.c +++ b/arch/tile/kernel/time.c @@ -230,6 +230,10 @@ int setup_profiling_timer(unsigned int multiplier) */ cycles_t ns2cycles(unsigned long nsecs) { - struct clock_event_device *dev = &__get_cpu_var(tile_timer); + /* + * We do not have to disable preemption here as each core has the same + * clock frequency. + */ + struct clock_event_device *dev = &__raw_get_cpu_var(tile_timer); return ((u64)nsecs * dev->mult) >> dev->shift; } diff --git a/arch/tile/lib/uaccess.c b/arch/tile/lib/uaccess.c index f8d398c..030abe3 100644 --- a/arch/tile/lib/uaccess.c +++ b/arch/tile/lib/uaccess.c @@ -22,11 +22,3 @@ int __range_ok(unsigned long addr, unsigned long size) is_arch_mappable_range(addr, size)); } EXPORT_SYMBOL(__range_ok); - -#ifdef CONFIG_DEBUG_COPY_FROM_USER -void copy_from_user_overflow(void) -{ - WARN(1, "Buffer overflow detected!\n"); -} -EXPORT_SYMBOL(copy_from_user_overflow); -#endif diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c index b3b4972..dfd63ce 100644 --- a/arch/tile/mm/pgtable.c +++ b/arch/tile/mm/pgtable.c @@ -592,12 +592,7 @@ void iounmap(volatile void __iomem *addr_in) in parallel. Reuse of the virtual address is prevented by leaving it in the global lists until we're done with it. cpa takes care of the direct mappings. */ - read_lock(&vmlist_lock); - for (p = vmlist; p; p = p->next) { - if (p->addr == addr) - break; - } - read_unlock(&vmlist_lock); + p = find_vm_area((void *)addr); if (!p) { pr_err("iounmap: bad address %p\n", addr); |