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Will Deacon c14c338cb0 kernel/spinlock.c: add default arch_*_relax definitions for GENERIC_LOCKBREAK 
When running with GENERIC_LOCKBREAK=y, the locking implementations emit
calls to arch_{read,write,spin}_relax when spinning on a contended lock
in order to allow architectures to favour the CPU owning the lock if
possible.

In reality, everybody apart from PowerPC and S390 just does cpu_relax()
here, so make that the default behaviour and allow it to be overridden
if required.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:58:21 -07:00
..
cpu
idle: Enable interrupts in the weak arch_cpu_idle() implementation
2013-06-14 23:01:05 +02:00
debug
kgdb/sysrq: fix inconstistent help message of sysrq key
2013-04-30 17:04:10 -07:00
events
Merge branches 'perf-urgent-for-linus' and 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-04 08:25:35 -07:00
gcov
kernel/gcov: remove depends on CONFIG_EXPERIMENTAL
2013-01-11 11:39:33 -08:00
irq
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-13 15:37:30 -07:00
power
mm: use zone_end_pfn() instead of zone_start_pfn+spanned_pages
2013-09-11 15:57:36 -07:00
printk
TTY/Serial driver patches for 3.12-rc1
2013-09-03 11:38:36 -07:00
sched
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-05 12:36:46 -07:00
time
Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-04 09:36:54 -07:00
trace
Not much changes for the 3.12 merge window. The major tracing changes
2013-09-09 14:42:15 -07:00
.gitignore
kernel/hz.bc: ignore.
2013-04-22 07:09:06 -07:00
acct.c
fs: Fix hang with BSD accounting on frozen filesystem
2013-05-04 14:57:58 -04:00
async.c
async: rename and redefine async_func_ptr
2013-03-12 13:59:14 -07:00
audit_tree.c
kernel/audit_tree.c:audit_add_tree_rule(): protect `rule' from kill_rules()
2013-06-12 16:29:46 -07:00
audit_watch.c
audit: catch possible NULL audit buffers
2013-01-11 14:54:55 -08:00
audit.c
audit: wait_for_auditd() should use TASK_UNINTERRUPTIBLE
2013-06-12 16:29:45 -07:00
audit.h
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
auditfilter.c
audit: Fix decimal constant description
2013-07-09 10:33:19 -07:00
auditsc.c
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
backtracetest.c
…
bounds.c
…
capability.c
xfs: update for v3.12-rc1
2013-09-09 11:19:09 -07:00
cgroup_freezer.c
cgroup: make css_for_each_descendant() and friends include the origin css in the iteration
2013-08-08 20:11:27 -04:00
cgroup.c
Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c
2013-09-07 19:54:57 -04:00
compat.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2013-05-01 07:21:43 -07:00
configs.c
proc: Supply PDE attribute setting accessor functions
2013-05-01 17:29:18 -04:00
context_tracking.c
context_tracking: User/kernel broundary cross trace events
2013-08-14 17:14:48 +02:00
cpu_pm.c
…
cpu.c
ACPI / processor: Acquire writer lock to update CPU maps
2013-08-13 12:20:16 +02:00
cpuset.c
Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2013-09-03 18:25:03 -07:00
crash_dump.c
…
cred.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-12-18 10:55:28 -08:00
delayacct.c
cputime: Use accessors to read task cputime stats
2013-01-27 19:23:31 +01:00
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
ptrace: revert "Prepare to fix racy accesses on task breakpoints"
2013-07-09 10:33:26 -07:00
extable.c
extable: Flip the sorting message
2013-04-15 13:25:16 +02:00
fork.c
mm: mempolicy: turn vma_set_policy() into vma_dup_policy()
2013-09-11 15:57:00 -07:00
freezer.c
freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes
2013-07-30 14:05:06 +02:00
futex_compat.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2013-02-23 18:50:11 -08:00
futex.c
futex: Use freezable blocking call
2013-06-25 23:11:19 +02:00
groups.c
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
hrtimer.c
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
hung_task.c
hung_task debugging: Print more info when reporting the problem
2013-08-02 11:02:42 +02:00
irq_work.c
Merge branch 'nohz/printk-v8' into irq/core
2013-02-05 00:48:46 +01:00
itimer.c
…
jump_label.c
jump_label: Split jumplabel ratelimit
2013-08-09 07:53:54 -07:00
kallsyms.c
kernel: kallsyms: memory override issue, need check destination buffer length
2013-04-15 15:17:26 +09:30
kcmp.c
kcmp: include linux/ptrace.h
2012-12-20 17:40:19 -08:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking: Fix copy/paste errors of "ARCH_INLINE_*_UNLOCK_BH"
2013-05-28 08:50:00 +02:00
Kconfig.preempt
…
kexec.c
kexec: Use min() and min_t() to simplify logic
2013-04-30 17:04:07 -07:00
kmod.c
usermodehelper: kill the sub_info->path[0] check
2013-07-03 16:08:02 -07:00
kprobes.c
kprobes/x86: Call out into INT3 handler directly instead of using notifier
2013-07-23 10:12:57 +02:00
ksysfs.c
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-12-11 18:10:49 -08:00
kthread.c
kthread: implement probe_kthread_data()
2013-04-30 17:04:02 -07:00
latencytop.c
…
lglock.c
lglock: Update lockdep annotations to report recursive local locks
2013-07-12 13:51:19 +02:00
lockdep_internals.h
…
lockdep_proc.c
lockdep: Use KSYM_NAME_LEN'ed buffer for __get_key_name()
2012-10-24 12:39:09 +02:00
lockdep_states.h
…
lockdep.c
lockdep: remove task argument from debug_check_no_locks_held
2013-05-12 14:16:21 +02:00
Makefile
printk: move to separate directory for easier modification
2013-07-31 14:41:03 -07:00
modsign_certificate.S
CONFIG_SYMBOL_PREFIX: cleanup.
2013-03-15 15:09:43 +10:30
modsign_pubkey.c
kernel/modsign_pubkey.c: fix init const for module signing code
2013-09-11 15:58:21 -07:00
module_signing.c
MODSIGN: Don't use enum-type bitfields in module signature info block
2012-12-05 11:27:24 +10:30
module-internal.h
MODSIGN: Move the magic string to the end of a module and eliminate the search
2012-10-19 17:30:40 -07:00
module.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-09-05 08:50:26 -07:00
mutex-debug.c
…
mutex-debug.h
…
mutex.c
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-04 08:18:19 -07:00
mutex.h
…
notifier.c
…
nsproxy.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
padata.c
padata - Register hotcpu notifier after initialization
2013-08-29 14:37:59 +10:00
panic.c
The majority of the changes here are cleanups for the large changes that
2013-07-11 09:02:09 -07:00
params.c
module: Fix mod->mkobj.kobj potentially freed too early
2013-09-03 16:35:47 +09:30
pid_namespace.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
pid.c
pidns: Fix hang in zap_pid_ns_processes by sending a potentially extra wakeup
2013-08-30 17:30:37 -07:00
posix-cpu-timers.c
posix_timers: fix racy timer delta caching on task exit
2013-07-03 16:54:42 +02:00
posix-timers.c
posix-timers: Remove unused variable
2013-04-18 12:51:19 +02:00
profile.c
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
ptrace.c
Revert "ptrace: PTRACE_DETACH should do flush_ptrace_hw_breakpoint(child)"
2013-08-06 13:16:32 -07:00
range.c
range: Do not add new blank slot with add_range_with_merge
2013-06-18 11:32:10 -05:00
rcu.h
rcu: Make call_rcu() leak callbacks for debug-object errors
2013-08-18 17:40:03 -07:00
rcupdate.c
Not much changes for the 3.12 merge window. The major tracing changes
2013-09-09 14:42:15 -07:00
rcutiny_plugin.h
rcu: Add const annotation to char * for RCU tracepoints and functions
2013-07-29 17:07:49 -04:00
rcutiny.c
rcu: Add const annotation to char * for RCU tracepoints and functions
2013-07-29 17:07:49 -04:00
rcutorture.c
rcu: Make rcutorture emit online failures if verbose
2013-08-20 11:38:45 -07:00
rcutree_plugin.h
nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU
2013-08-31 14:44:02 -07:00
rcutree_trace.c
rcutrace: single_open() leaks
2013-05-05 00:16:35 -04:00
rcutree.c
Merge branches 'doc.2013.08.19a', 'fixes.2013.08.20a', 'sysidle.2013.08.31a' and 'torture.2013.08.20a' into HEAD
2013-08-31 14:44:45 -07:00
rcutree.h
nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU
2013-08-31 14:44:02 -07:00
reboot.c
reboot: move arch/x86 reboot= handling to generic kernel
2013-07-09 10:33:29 -07:00
relay.c
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
res_counter.c
res_counter: return amount of charges after res_counter_uncharge()
2012-12-18 15:02:12 -08:00
resource.c
kernel/resource.c: remove the unneeded assignment in function __find_resource
2013-07-03 16:08:06 -07:00
rtmutex_common.h
…
rtmutex-debug.c
sched/rt: Move rt specific bits into new header file
2013-02-07 20:51:08 +01:00
rtmutex-debug.h
…
rtmutex-tester.c
locking/rtmutex/tester: Set correct permissions on sysfs files
2013-04-10 14:48:37 +02:00
rtmutex.c
rtmutex: Document rt_mutex_adjust_prio_chain()
2013-05-28 09:23:52 +02:00
rtmutex.h
…
rwsem.c
Revert "rw_semaphore: remove up/down_read_non_owner"
2013-03-23 15:53:52 -07:00
seccomp.c
seccomp: allow BPF_XOR based ALU instructions.
2013-03-26 11:07:19 +11:00
semaphore.c
semaphore: use `bool' type for semaphore_waiter's up
2013-04-30 17:04:08 -07:00
signal.c
kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user()
2013-09-11 15:58:18 -07:00
smp.c
kernel/smp.c: free related resources when failure occurs in hotplug_cfd()
2013-09-11 15:58:21 -07:00
smpboot.c
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
smpboot.h
…
softirq.c
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
spinlock.c
kernel/spinlock.c: add default arch_*_relax definitions for GENERIC_LOCKBREAK
2013-09-11 15:58:21 -07:00
srcu.c
srcu: use ACCESS_ONCE() to access sp->completed in srcu_read_lock()
2013-02-07 15:19:36 -08:00
stacktrace.c
…
stop_machine.c
stop_machine: Mark per cpu stopper enabled early
2013-02-26 22:25:17 +01:00
sys_ni.c
unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE
2013-05-09 13:46:38 -04:00
sys.c
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
sysctl_binary.c
kernel: remove unnecessary head file
2013-06-26 18:01:46 +09:00
sysctl.c
mm: prepare to remove /proc/sys/vm/hugepages_treat_as_movable
2013-09-11 15:57:49 -07:00
task_work.c
…
taskstats.c
taskstats: cgroupstats_user_cmd() may leak on error
2012-10-06 03:05:31 +09:00
test_kprobes.c
kernel/: rename random32() to prandom_u32()
2013-04-29 18:28:42 -07:00
time.c
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
timeconst.bc
kernel: Replace timeconst.pl with a bc script
2013-02-16 23:17:25 +01:00
timer.c
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
tracepoint.c
Tracing updates for Linux 3.10
2013-04-29 13:55:38 -07:00
tsacct.c
cputime: Use accessors to read task cputime stats
2013-01-27 19:23:31 +01:00
uid16.c
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
up.c
…
user_namespace.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
user-return-notifier.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
user.c
userns: Better restrictions on when proc and sysfs can be mounted
2013-08-26 19:17:03 -07:00
utsname_sysctl.c
kernel/utsname_sysctl.c: put get/get_uts() into CONFIG_PROC_SYSCTL code block
2013-02-27 19:10:22 -08:00
utsname.c
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
wait.c
kernel: fix new kernel-doc warning in wait.c
2013-08-19 09:08:54 -07:00
watchdog.c
watchdog: Make it work under full dynticks
2013-07-30 22:29:15 +02:00
workqueue_internal.h
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
workqueue.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00