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2010-08-10Merge branch 'writable_limits' of git://decibel.fi.muni.cz/~xslaby/linuxLinus Torvalds
* 'writable_limits' of git://decibel.fi.muni.cz/~xslaby/linux: unistd: add __NR_prlimit64 syscall numbers rlimits: implement prlimit64 syscall rlimits: switch more rlimit syscalls to do_prlimit rlimits: redo do_setrlimit to more generic do_prlimit rlimits: add rlimit64 structure rlimits: do security check under task_lock rlimits: allow setrlimit to non-current tasks rlimits: split sys_setrlimit rlimits: selinux, do rlimits changes under task_lock rlimits: make sure ->rlim_max never grows in sys_setrlimit rlimits: add task_struct to update_rlimit_cpu rlimits: security, add task_struct to setrlimit Fix up various system call number conflicts. We not only added fanotify system calls in the meantime, but asm-generic/unistd.h added a wait4 along with a range of reserved per-architecture system calls.
2010-08-10Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notifyLinus Torvalds
* 'for-linus' of git://git.infradead.org/users/eparis/notify: (132 commits) fanotify: use both marks when possible fsnotify: pass both the vfsmount mark and inode mark fsnotify: walk the inode and vfsmount lists simultaneously fsnotify: rework ignored mark flushing fsnotify: remove global fsnotify groups lists fsnotify: remove group->mask fsnotify: remove the global masks fsnotify: cleanup should_send_event fanotify: use the mark in handler functions audit: use the mark in handler functions dnotify: use the mark in handler functions inotify: use the mark in handler functions fsnotify: send fsnotify_mark to groups in event handling functions fsnotify: Exchange list heads instead of moving elements fsnotify: srcu to protect read side of inode and vfsmount locks fsnotify: use an explicit flag to indicate fsnotify_destroy_mark has been called fsnotify: use _rcu functions for mark list traversal fsnotify: place marks on object in order of group memory address vfs/fsnotify: fsnotify_close can delay the final work in fput fsnotify: store struct file not struct path ... Fix up trivial delete/modify conflict in fs/notify/inotify/inotify.c.
2010-08-10Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits) no need for list_for_each_entry_safe()/resetting with superblock list Fix sget() race with failing mount vfs: don't hold s_umount over close_bdev_exclusive() call sysv: do not mark superblock dirty on remount sysv: do not mark superblock dirty on mount btrfs: remove junk sb_dirt change BFS: clean up the superblock usage AFFS: wait for sb synchronization when needed AFFS: clean up dirty flag usage cifs: truncate fallout mbcache: fix shrinker function return value mbcache: Remove unused features add f_flags to struct statfs(64) pass a struct path to vfs_statfs update VFS documentation for method changes. All filesystems that need invalidate_inode_buffers() are doing that explicitly convert remaining ->clear_inode() to ->evict_inode() Make ->drop_inode() just return whether inode needs to be dropped fs/inode.c:clear_inode() is gone fs/inode.c:evict() doesn't care about delete vs. non-delete paths now ... Fix up trivial conflicts in fs/nilfs2/super.c
2010-08-10gcc-4.6: printk: use stable variable to dump kmsg bufferAndi Kleen
kmsg_dump takes care to sample the global variables inside a spinlock, but then goes on to use the same variables outside the spinlock region too. Use the correct variable. This will make the race window smaller. Found by gcc 4.6's new warnings. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-10stop_machine: struct cpu_stopper, remove alignment padding on 64 bitsRichard Kennedy
Reorder elements in structure cpu_stopper to remove alignment padding on 64 bit builds, this shrinks its size from 40 to 32 bytes saving 8 bytes per cpu. Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> Acked-by: Tejun Heo <tj@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-10kernel/range: remove unused definition of ARRAY_SIZE()Geert Uytterhoeven
Remove duplicate definition of ARRAY_SIZE(), which was never used anyway. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-10sys_personality: remove the bogus checks in ↵Oleg Nesterov
sys_personality()->__set_personality() path Cleanup, no functional changes. - __set_personality() always changes ->exec_domain/personality, the special case when ->exec_domain remains the same buys nothing but complicates the code. Unify both cases to simplify the code. - The -EINVAL check in sys_personality() was never right. If we assume that set_personality() can fail we should check the value it returns instead of verifying that task->personality was actually changed. Remove it. Before the previous patch it was possible to hit this case due to overflow problems, but this -EINVAL just indicated the kernel bug. OTOH, probably it makes sense to change lookup_exec_domain() to return ERR_PTR() instead of default_exec_domain if the search in exec_domains list fails, and report this error to the user-space. But this means another user-space change, and we have in-kernel users which need fixes. For example, PER_OSF4 falls into PER_MASK for unkown reason and nobody cares to register this domain. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Wenming Zhang <wezhang@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-10hibernation: freeze swap at hibernationKAMEZAWA Hiroyuki
When taking a memory snapshot in hibernate_snapshot(), all (directly called) memory allocations use GFP_ATOMIC. Hence swap misusage during hibernation never occurs. But from a pessimistic point of view, there is no guarantee that no page allcation has __GFP_WAIT. It is better to have a global indication "we enter hibernation, don't use swap!". This patch tries to freeze new-swap-allocation during hibernation. (All user processes are frozenm so swapin is not a concern). This way, no updates will happen to swap_map[] between hibernate_snapshot() and save_image(). Swap is thawed when swsusp_free() is called. We can be assured that swap corruption will not occur. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Hugh Dickins <hughd@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Ondrej Zary <linux@rainbow-software.org> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-10oom: badness heuristic rewriteDavid Rientjes
This a complete rewrite of the oom killer's badness() heuristic which is used to determine which task to kill in oom conditions. The goal is to make it as simple and predictable as possible so the results are better understood and we end up killing the task which will lead to the most memory freeing while still respecting the fine-tuning from userspace. Instead of basing the heuristic on mm->total_vm for each task, the task's rss and swap space is used instead. This is a better indication of the amount of memory that will be freeable if the oom killed task is chosen and subsequently exits. This helps specifically in cases where KDE or GNOME is chosen for oom kill on desktop systems instead of a memory hogging task. The baseline for the heuristic is a proportion of memory that each task is currently using in memory plus swap compared to the amount of "allowable" memory. "Allowable," in this sense, means the system-wide resources for unconstrained oom conditions, the set of mempolicy nodes, the mems attached to current's cpuset, or a memory controller's limit. The proportion is given on a scale of 0 (never kill) to 1000 (always kill), roughly meaning that if a task has a badness() score of 500 that the task consumes approximately 50% of allowable memory resident in RAM or in swap space. The proportion is always relative to the amount of "allowable" memory and not the total amount of RAM systemwide so that mempolicies and cpusets may operate in isolation; they shall not need to know the true size of the machine on which they are running if they are bound to a specific set of nodes or mems, respectively. Root tasks are given 3% extra memory just like __vm_enough_memory() provides in LSMs. In the event of two tasks consuming similar amounts of memory, it is generally better to save root's task. Because of the change in the badness() heuristic's baseline, it is also necessary to introduce a new user interface to tune it. It's not possible to redefine the meaning of /proc/pid/oom_adj with a new scale since the ABI cannot be changed for backward compatability. Instead, a new tunable, /proc/pid/oom_score_adj, is added that ranges from -1000 to +1000. It may be used to polarize the heuristic such that certain tasks are never considered for oom kill while others may always be considered. The value is added directly into the badness() score so a value of -500, for example, means to discount 50% of its memory consumption in comparison to other tasks either on the system, bound to the mempolicy, in the cpuset, or sharing the same memory controller. /proc/pid/oom_adj is changed so that its meaning is rescaled into the units used by /proc/pid/oom_score_adj, and vice versa. Changing one of these per-task tunables will rescale the value of the other to an equivalent meaning. Although /proc/pid/oom_adj was originally defined as a bitshift on the badness score, it now shares the same linear growth as /proc/pid/oom_score_adj but with different granularity. This is required so the ABI is not broken with userspace applications and allows oom_adj to be deprecated for future removal. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Nick Piggin <npiggin@suse.de> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Balbir Singh <balbir@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-10oom: move sysctl declarations to oom.hDavid Rientjes
The three oom killer sysctl variables (sysctl_oom_dump_tasks, sysctl_oom_kill_allocating_task, and sysctl_panic_on_oom) are better declared in include/linux/oom.h rather than kernel/sysctl.c. Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-09pass a struct path to vfs_statfsChristoph Hellwig
We'll need the path to implement the flags field for statvfs support. We do have it available in all callers except: - ecryptfs_statfs. This one doesn't actually need vfs_statfs but just needs to do a caller to the lower filesystem statfs method. - sys_ustat. Add a non-exported statfs_by_dentry helper for it which doesn't won't be able to fill out the flags field later on. In addition rename the helpers for statfs vs fstatfs to do_*statfs instead of the misleading vfs prefix. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09workqueue: workqueue_cpu_callback() should be cpu_notifier instead of ↵Tejun Heo
hotcpu_notifier Commit 6ee0578b (workqueue: mark init_workqueues as early_initcall) made workqueue SMP initialization depend on workqueue_cpu_callback(), which however was registered as hotcpu_notifier() and didn't get called if CONFIG_HOTPLUG_CPU is not set. This made gcwqs on non-boot CPUs not create their initial workers leading to boot failures. Fix it by making it a cpu_notifier. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-and-bisected-by: walt <w41ter@gmail.com> Tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
2010-08-08workqueue: add missing __percpu markup in kernel/workqueue.cNamhyung Kim
works in schecule_on_each_cpu() is a percpu pointer but was missing __percpu markup. Add it. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2010-08-08Merge branch 'bkl/core' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing * 'bkl/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing: do_coredump: Do not take BKL init: Remove the BKL from startup code
2010-08-07Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wqLinus Torvalds
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (55 commits) workqueue: mark init_workqueues() as early_initcall() workqueue: explain for_each_*cwq_cpu() iterators fscache: fix build on !CONFIG_SYSCTL slow-work: kill it gfs2: use workqueue instead of slow-work drm: use workqueue instead of slow-work cifs: use workqueue instead of slow-work fscache: drop references to slow-work fscache: convert operation to use workqueue instead of slow-work fscache: convert object to use workqueue instead of slow-work workqueue: fix how cpu number is stored in work->data workqueue: fix mayday_mask handling on UP workqueue: fix build problem on !CONFIG_SMP workqueue: fix locking in retry path of maybe_create_worker() async: use workqueue for worker pool workqueue: remove WQ_SINGLE_CPU and use WQ_UNBOUND instead workqueue: implement unbound workqueue workqueue: prepare for WQ_UNBOUND implementation libata: take advantage of cmwq and remove concurrency limitations workqueue: fix worker management invocation without pending works ... Fixed up conflicts in fs/cifs/* as per Tejun. Other trivial conflicts in include/linux/workqueue.h, kernel/trace/Kconfig and kernel/workqueue.c
2010-08-06Merge branch 'irq-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: xen: Do not suspend IPI IRQs. powerpc: Use IRQF_NO_SUSPEND not IRQF_TIMER for non-timer interrupts ixp4xx-beeper: Use IRQF_NO_SUSPEND not IRQF_TIMER for non-timer interrupt irq: Add new IRQ flag IRQF_NO_SUSPEND
2010-08-06Merge branch 'timers-timekeeping-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-timekeeping-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: um: Fix read_persistent_clock fallout kgdb: Do not access xtime directly powerpc: Clean up obsolete code relating to decrementer and timebase powerpc: Rework VDSO gettimeofday to prevent time going backwards clocksource: Add __clocksource_updatefreq_hz/khz methods x86: Convert common clocksources to use clocksource_register_hz/khz timekeeping: Make xtime and wall_to_monotonic static hrtimer: Cleanup direct access to wall_to_monotonic um: Convert to use read_persistent_clock timkeeping: Fix update_vsyscall to provide wall_to_monotonic offset powerpc: Cleanup xtime usage powerpc: Simplify update_vsyscall time: Kill off CONFIG_GENERIC_TIME time: Implement timespec_add x86: Fix vtime/file timestamp inconsistencies Trivial conflicts in Documentation/feature-removal-schedule.txt Much less trivial conflicts in arch/powerpc/kernel/time.c resolved as per Thomas' earlier merge commit 47916be4e28c ("Merge branch 'powerpc.cherry-picks' into timers/clocksource")
2010-08-06Merge branch 'timers-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: Documentation: Add timers/timers-howto.txt timer: Added usleep_range timer Revert "timer: Added usleep[_range] timer" clockevents: Remove the per cpu tick skew posix_timer: Move copy_to_user(created_timer_id) down in timer_create() timer: Added usleep[_range] timer timers: Document meaning of deferrable timer
2010-08-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (28 commits) driver core: device_rename's new_name can be const sysfs: Remove owner field from sysfs struct attribute powerpc/pci: Remove owner field from attribute initialization in PCI bridge init regulator: Remove owner field from attribute initialization in regulator core driver leds: Remove owner field from attribute initialization in bd2802 driver scsi: Remove owner field from attribute initialization in ARCMSR driver scsi: Remove owner field from attribute initialization in LPFC driver cgroupfs: create /sys/fs/cgroup to mount cgroupfs on Driver core: Add BUS_NOTIFY_BIND_DRIVER driver core: fix memory leak on one error path in bus_register() debugfs: no longer needs to depend on SYSFS sysfs: Fix one more signature discrepancy between sysfs implementation and docs. sysfs: fix discrepancies between implementation and documentation dcdbas: remove a redundant smi_data_buf_free in dcdbas_exit dmi-id: fix a memory leak in dmi_id_init error path sysfs: sysfs_chmod_file's attr can be const firmware: Update hotplug script Driver core: move platform device creation helpers to .init.text (if MODULE=n) Driver core: reduce duplicated code for platform_device creation Driver core: use kmemdup in platform_device_add_resources ...
2010-08-06Merge branch 'sched-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits) sched: Use correct macro to display sched_child_runs_first in /proc/sched_debug sched: No need for bootmem special cases sched: Revert nohz_ratelimit() for now sched: Reduce update_group_power() calls sched: Update rq->clock for nohz balanced cpus sched: Fix spelling of sibling sched, cpuset: Drop __cpuexit from cpu hotplug callbacks sched: Fix the racy usage of thread_group_cputimer() in fastpath_timer_check() sched: run_posix_cpu_timers: Don't check ->exit_state, use lock_task_sighand() sched: thread_group_cputime: Simplify, document the "alive" check sched: Remove the obsolete exit_state/signal hacks sched: task_tick_rt: Remove the obsolete ->signal != NULL check sched: __sched_setscheduler: Read the RLIMIT_RTPRIO value lockless sched: Fix comments to make them DocBook happy sched: Fix fix_small_capacity powerpc: Exclude arch_sd_sibiling_asym_packing() on UP powerpc: Enable asymmetric SMT scheduling on POWER7 sched: Add asymmetric group packing option for sibling domain sched: Fix capacity calculations for SMT4 sched: Change nohz idle load balancing logic to push model ...
2010-08-06Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (162 commits) tracing/kprobes: unregister_trace_probe needs to be called under mutex perf: expose event__process function perf events: Fix mmap offset determination perf, powerpc: fsl_emb: Restore setting perf_sample_data.period perf, powerpc: Convert the FSL driver to use local64_t perf tools: Don't keep unreferenced maps when unmaps are detected perf session: Invalidate last_match when removing threads from rb_tree perf session: Free the ref_reloc_sym memory at the right place x86,mmiotrace: Add support for tracing STOS instruction perf, sched migration: Librarize task states and event headers helpers perf, sched migration: Librarize the GUI class perf, sched migration: Make the GUI class client agnostic perf, sched migration: Make it vertically scrollable perf, sched migration: Parameterize cpu height and spacing perf, sched migration: Fix key bindings perf, sched migration: Ignore unhandled task states perf, sched migration: Handle ignored migrate out events perf: New migration tool overview tracing: Drop cpparg() macro perf: Use tracepoint_synchronize_unregister() to flush any pending tracepoint call ... Fix up trivial conflicts in Makefile and drivers/cpufreq/cpufreq.c
2010-08-06Merge branch 'core-rcu-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: Revert "net: Make accesses to ->br_port safe for sparse RCU" mce: convert to rcu_dereference_index_check() net: Make accesses to ->br_port safe for sparse RCU vfs: add fs.h to define struct file lockdep: Add an in_workqueue_context() lockdep-based test function rcu: add __rcu API for later sparse checking rcu: add an rcu_dereference_index_check() tree/tiny rcu: Add debug RCU head objects mm: remove all rcu head initializations fs: remove all rcu head initializations, except on_stack initializations powerpc: remove all rcu head initializations
2010-08-05Merge branch 'kms-merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb * 'kms-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: kgdb,docs: Update the kgdb docs to include kms drm_fb_helper: Preserve capability to use atomic kms i915: when kgdb is active display compression should be off drm/i915: use new fb debug hooks drm: add KGDB/KDB support fb: add hooks to handle KDB enter/exit kgdboc: Add call backs to allow kernel mode switching vt,console,kdb: automatically set kdb LINES variable vt,console,kdb: implement atomic console enter/leave functions
2010-08-05Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: debug_core,kdb: fix crash when arch does not have single step kgdb,x86: use macro HBP_NUM to replace magic number 4 kgdb,mips: remove unused kgdb_cpu_doing_single_step operations mm,kdb,kgdb: Add a debug reference for the kdb kmap usage KGDB: Remove set but unused newPC ftrace,kdb: Allow dumping a specific cpu's buffer with ftdump ftrace,kdb: Extend kdb to be able to dump the ftrace buffer kgdb,powerpc: Replace hardcoded offset by BREAK_INSTR_SIZE arm,kgdb: Add ability to trap into debugger on notify_die gdbstub: do not directly use dbg_reg_def[] in gdb_cmd_reg_set() gdbstub: Implement gdbserial 'p' and 'P' packets kgdb,arm: Individual register get/set for arm kgdb,mips: Individual register get/set for mips kgdb,x86: Individual register get/set for x86 kgdb,kdb: individual register set and and get API gdbstub: Optimize kgdb's "thread:" response for the gdb serial protocol kgdb: remove custom hex_to_bin()implementation
2010-08-05cgroupfs: create /sys/fs/cgroup to mount cgroupfs onGreg KH
We really shouldn't be asking userspace to create new root filesystems. So follow along with all of the other in-kernel filesystems, and provide a mount point in sysfs. For cgroupfs, this should be in /sys/fs/cgroup/ This change provides that mount point when the cgroup filesystem is registered in the kernel. Acked-by: Paul Menage <menage@google.com> Acked-by: Dhaval Giani <dhaval.giani@gmail.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Lennart Poettering <lennart@poettering.net> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-05hotplug: Support kernel/hotplug sysctl variable when !CONFIG_NETIan Abbott
The kernel/hotplug sysctl variable (/proc/sys/kernel/hotplug file) was made conditional on CONFIG_NET by commit f743ca5e10f4145e0b3e6d11b9b46171e16af7ce (applied in 2.6.18) to fix problems with undefined references in 2.6.16 when CONFIG_HOTPLUG=y && !CONFIG_NET, but this restriction is no longer needed. This patch makes the kernel/hotplug sysctl variable depend only on CONFIG_HOTPLUG. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Acked-by: Randy Dunlap <randy.dunlap@oracle.COM> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-05Merge branch 'modules' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus * 'modules' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: module: cleanup comments, remove noinline module: group post-relocation functions into post_relocation() module: move module args strndup_user to just before use module: pass load_info into other functions module: fix sysfs cleanup for !CONFIG_SYSFS module: sysfs cleanup module: layout_and_allocate module: fix crash in get_ksymbol() when oopsing in module init module: kallsyms functions take struct load_info module: refactor out section header rewriting: FIX modversions module: refactor out section header rewriting module: add load_info module: reduce stack usage for each_symbol() module: refactor load_module part 5 module: refactor load_module part 4 module: refactor load_module part 3 module: refactor load_module part 2 module: refactor load_module module: module_unload_init() cleanup
2010-08-05Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (79 commits) powerpc/8xx: Add support for the MPC8xx based boards from TQC powerpc/85xx: Introduce support for the Freescale P1022DS reference board powerpc/85xx: Adding DTS for the STx GP3-SSA MPC8555 board powerpc/85xx: Change deprecated binding for 85xx-based boards powerpc/tqm85xx: add a quirk for ti1520 PCMCIA bridge powerpc/tqm85xx: update PCI interrupt-map attribute powerpc/mpc8308rdb: support for MPC8308RDB board from Freescale powerpc/fsl_pci: add quirk for mpc8308 pcie bridge powerpc/85xx: Cleanup QE initialization for MPC85xxMDS boards powerpc/85xx: Fix booting for P1021MDS boards powerpc/85xx: Fix SWIOTLB initalization for MPC85xxMDS boards powerpc/85xx: kexec for SMP 85xx BookE systems powerpc/5200/i2c: improve i2c bus error recovery of/xilinxfb: update tft compatible versions powerpc/fsl-diu-fb: Support setting display mode using EDID powerpc/5121: doc/dts-bindings: update doc of FSL DIU bindings powerpc/5121: shared DIU framebuffer support powerpc/5121: move fsl-diu-fb.h to include/linux powerpc/5121: fsl-diu-fb: fix issue with re-enabling DIU area descriptor powerpc/512x: add clock structure for Video-IN (VIU) unit ...
2010-08-05Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linusLinus Torvalds
* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (150 commits) MIPS: PowerTV: Separate PowerTV USB support from non-USB code MIPS: strip the un-needed sections of vmlinuz MIPS: Clean up the calculation of VMLINUZ_LOAD_ADDRESS MIPS: Clean up arch/mips/boot/compressed/decompress.c MIPS: Clean up arch/mips/boot/compressed/ld.script MIPS: Unify the suffix of compressed vmlinux.bin MIPS: PowerTV: Add Gaia platform definitions. MIPS: BCM47xx: Fix nvram_getenv return value. MIPS: Octeon: Allow more than 3.75GB of memory with PCIe MIPS: Clean up notify_die() usage. MIPS: Remove unused task_struct.trap_no field. Documentation: Mention that KProbes is supported on MIPS SAMPLES: kprobe_example: Make it print something on MIPS. MIPS: kprobe: Add support. MIPS: Add instrunction format for BREAK and SYSCALL MIPS: kprobes: Define regs_return_value() MIPS: Ritually kill stupid printk. MIPS: Octeon: Disallow MSI-X interrupt and fall back to MSI interrupts. MIPS: Octeon: Support 256 MSI on PCIe MIPS: Decode core number for R2 CPUs. ...
2010-08-05vt,console,kdb: automatically set kdb LINES variableJason Wessel
The kernel console interface stores the number of lines it is configured to use. The kdb debugger can greatly benefit by knowing how many lines there are on the console for the pager functionality without having the end user compile in the setting or have to repeatedly change it at run time. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> CC: David Airlie <airlied@linux.ie> CC: Andrew Morton <akpm@linux-foundation.org>
2010-08-05debug_core,kdb: fix crash when arch does not have single stepJason Wessel
When an arch such as mips and microblaze does not implement either HW or software single stepping the debug core should re-enter kdb. The kdb code will properly ignore the single step operation. Attempting to single step the kernel without software or hardware support causes unpredictable kernel crashes. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-08-05ftrace,kdb: Allow dumping a specific cpu's buffer with ftdumpJason Wessel
In systems with more than one processor it is desirable to look at the per cpu trace buffers. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> CC: Frederic Weisbecker <fweisbec@gmail.com>
2010-08-05ftrace,kdb: Extend kdb to be able to dump the ftrace bufferJason Wessel
Add in a helper function to allow the kdb shell to dump the ftrace buffer. Modify trace.c to expose the capability to iterate over the ftrace buffer in a read only capacity. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> CC: Frederic Weisbecker <fweisbec@gmail.com>
2010-08-05gdbstub: do not directly use dbg_reg_def[] in gdb_cmd_reg_set()Jason Wessel
Presently the usable registers definitions on x86 are not contiguous for kgdb. The x86 kgdb uses a case statement for the sparse register accesses. The array which defines the registers (dbg_reg_def) should not be used directly in order to safely work with sparse register definitions. Specifically there was a problem when gdb accesses ORIG_AX, which is accessed only through the case statement. This patch encodes register memory using the size information provided from the debugger which avoids the need to look up the size of the register. The dbg_set_reg() function always further validates the inputs from the debugger. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
2010-08-05gdbstub: Implement gdbserial 'p' and 'P' packetsJason Wessel
The gdbserial 'p' and 'P' packets allow gdb to individually get and set registers instead of querying for all the available registers. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-08-05kgdb,kdb: individual register set and and get APIJason Wessel
The kdb shell specification includes the ability to get and set architecture specific registers by name. For the time being individual register get and set will be implemented on a per architecture basis. If an architecture defines DBG_MAX_REG_NUM > 0 then kdb and the gdbstub will use the capability for individually getting and setting architecture specific registers. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-08-05gdbstub: Optimize kgdb's "thread:" response for the gdb serial protocolJason Wessel
The gdb debugger understands how to parse short versions of the thread reference string as long as the bytes are paired in sets of two characters. The kgdb implementation was always sending 8 leading zeros which could be omitted, and further optimized in the case of non-negative thread numbers. The negative numbers are used to reference a specific cpu in the case of kgdb. An example of the previous i386 stop packet looks like: T05thread:00000000000003bb; New stop packet response: T05thread:03bb; The previous ThreadInfo response looks like: m00000000fffffffe,0000000000000001,0000000000000002,0000000000000003,0000000000000004,0000000000000005,0000000000000006,0000000000000007,000000000000000c,0000000000000088,000000000000008a,000000000000008b,000000000000008c,000000000000008d,000000000000008e,00000000000000d4,00000000000000d5,00000000000000dd New ThreadInfo response: mfffffffe,01,02,03,04,05,06,07,0c,88,8a,8b,8c,8d,8e,d4,d5,dd A few bytes saved means better response time when using kgdb over a serial line. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-08-05kgdb: remove custom hex_to_bin()implementationAndy Shevchenko
Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-08-05printk: fix delayed messages from CPU hotplug eventsKevin Cernekee
When a secondary CPU is being brought up, it is not uncommon for printk() to be invoked when cpu_online(smp_processor_id()) == 0. The case that I witnessed personally was on MIPS: http://lkml.org/lkml/2010/5/30/4 If (can_use_console() == 0), printk() will spool its output to log_buf and it will be visible in "dmesg", but that output will NOT be echoed to the console until somebody calls release_console_sem() from a CPU that is online. Therefore, the boot time messages from the new CPU can get stuck in "limbo" for a long time, and might suddenly appear on the screen when a completely unrelated event (e.g. "eth0: link is down") occurs. This patch modifies the console code so that any pending messages are automatically flushed out to the console whenever a CPU hotplug operation completes successfully or aborts. The issue was seen on 2.6.34. Original patch by Kevin Cernekee with cleanups by akpm and additional fixes by Santosh Shilimkar. This patch superseeds https://patchwork.linux-mips.org/patch/1357/. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> To: <mingo@elte.hu> To: <akpm@linux-foundation.org> To: <simon.kagstrom@netinsight.net> To: <David.Woodhouse@intel.com> To: <lethal@linux-sh.org> Cc: <linux-kernel@vger.kernel.org> Cc: <linux-mips@linux-mips.org> Reviewed-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/1534/ LKML-Reference: <ede63b5a20af951c755736f035d1e787772d7c28@localhost> LKML-Reference: <EAF47CD23C76F840A9E7FCE10091EFAB02C5DB6D1F@dbde02.ent.ti.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-08-05Merge branch 'sched/urgent' into sched/coreIngo Molnar
Conflicts: include/linux/sched.h Merge reason: Add the leftover .35 urgent bits, fix the conflict. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-08-05Merge branch 'perf/core' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/core
2010-08-05Merge branch 'perf/nmi' into perf/coreIngo Molnar
Conflicts: kernel/Makefile Merge reason: Add the now complete topic, fix the conflict. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-08-05module: cleanup comments, remove noinlineRusty Russell
On my (32-bit x86) machine, sys_init_module() uses 124 bytes of stack once load_module() is inlined. This effectively reverts ffb4ba76 which inlined it due to stack pressure. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-05module: group post-relocation functions into post_relocation()Rusty Russell
This simply hoists more code out of load_module; we also put the identification of the extable and dynamic debug table in with the others in find_module_sections(). We move the taint check to the actual add/remove of the dynamic debug info: this is certain (find_module_sections is too early). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Yehuda Sadeh <yehuda@hq.newdream.net>
2010-08-05module: move module args strndup_user to just before useRusty Russell
Instead of copying and allocating the args and storing it in load_info, we can just allocate them right before we need them. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-05module: pass load_info into other functionsRusty Russell
Pass the struct load_info into all the other functions in module loading. This neatens things and makes them more consistent. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-05module: fix sysfs cleanup for !CONFIG_SYSFSRusty Russell
Restore the stub module_remove_modinfo_attrs, remove the now-unused !CONFIG_SYSFS module_sysfs_init. Also, rename mod_kobject_remove() to mod_sysfs_teardown() as it is the logical counterpart to mod_sysfs_setup now. Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-05module: sysfs cleanupRusty Russell
We change the sysfs functions to take struct load_info, and call them all in mod_sysfs_setup(). We also clean up the #ifdefs a little. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-05module: layout_and_allocateRusty Russell
layout_and_allocate() does everything up to and including the final struct module placement inside the allocated module memory. We have to store the symbol layout information in our struct load_info though. This avoids the nasty code we had before where 'mod' pointed first to the version inside the temporary allocation containing the entire file, then later was moved to point to the real struct module: now the main code only ever sees the final module address. (Includes fix for the Tony Luck-found Linus-diagnosed failure path error). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-05module: fix crash in get_ksymbol() when oopsing in module initRusty Russell
Andrew had the sole pleasure of tickling this bug in linux-next; when we set up "info->strtab" it's pointing into the temporary copy of the module. For most uses that is fine, but kallsyms keeps a pointer around during module load (inside mod->strtab). If we oops for some reason inside a module's init function, kallsyms will use the mod->strtab pointer into the now-freed temporary module copy. (Later oopses work fine: after init we overwrite mod->strtab to point to a compacted core-only strtab). Reported-by: Andrew "Grumpy" Morton <akpm@linux-foundation.org> Signed-off-by: Rusty "Buggy" Russell <rusty@rustcorp.com.au> Tested-by: Andrew "Happy" Morton <akpm@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>