Davidlohr Bueso 3552a07a9c locking/mcs: Use acquire/release semantics ...

As of 654672d4ba (locking/atomics: Add _{acquire|release|relaxed}()
variants of some atomic operations) and 6d79ef2d30 (locking, asm-generic:
Add _{relaxed|acquire|release}() variants for 'atomic_long_t'), weakly
ordered archs can benefit from more relaxed use of barriers when locking
and unlocking, instead of regular full barrier semantics. While currently
only arm64 supports such optimizations, updating corresponding locking
primitives serves for other archs to immediately benefit as well, once the
necessary machinery is implemented of course.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul E.McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1443643395-17016-5-git-send-email-dave@stgolabs.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2015-10-06 17:28:23 +02:00

..

lglock.c

sched/stop_machine: Fix deadlock between multiple stop_two_cpus()

2015-06-19 10:03:12 +02:00

lockdep_internals.h

lockdep: Increase static allocations

2014-04-18 14:20:50 +02:00

lockdep_proc.c

lockdep: Fix a race between /proc/lock_stat and module unload

2015-06-07 15:46:30 +02:00

lockdep_states.h

locking: Move the lockdep code to kernel/locking/

2013-11-06 07:55:08 +01:00

lockdep.c

locking/lockdep: Fix hlock->pin_count reset on lock stack rebuilds

2015-09-23 09:48:53 +02:00

locktorture.c

locktorture: Change longdelay_us to longdelay_ms

2015-05-27 12:59:57 -07:00

Makefile

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-09-05 20:34:28 -07:00

mcs_spinlock.h

locking/mcs: Use acquire/release semantics

2015-10-06 17:28:23 +02:00

mutex-debug.c

mutex: Always clear owner field upon mutex_unlock()

2015-01-09 11:20:39 +01:00

mutex-debug.h

locking: Move the mutex code to kernel/locking/

2013-11-06 07:55:07 +01:00

mutex.c

locking/mutex: Use acquire/release semantics

2015-10-06 17:28:20 +02:00

mutex.h

locking/mutexes: Use MUTEX_SPIN_ON_OWNER when appropriate

2014-08-13 10:32:02 +02:00

osq_lock.c

locking/osq: Relax atomic semantics

2015-09-18 09:27:29 +02:00

percpu-rwsem.c

percpu-rwsem: introduce percpu_down_read_trylock()

2015-08-15 13:52:10 +02:00

qrwlock.c

locking/qrwlock: Rename ->lock to ->wait_lock

2015-09-18 09:27:29 +02:00

qspinlock_paravirt.h

locking/pvqspinlock: Kick the PV CPU unconditionally when _Q_SLOW_VAL

2015-09-18 09:27:29 +02:00

qspinlock.c

locking/qspinlock/x86: Fix performance regression under unaccelerated VMs

2015-09-11 07:49:42 +02:00

rtmutex_common.h

rtmutex: Delete scriptable tester

2015-07-20 11:45:45 +02:00

rtmutex-debug.c

rtmutex: Cleanup deadlock detector debug logic

2014-06-21 22:05:30 +02:00

rtmutex-debug.h

rtmutex: Cleanup deadlock detector debug logic

2014-06-21 22:05:30 +02:00

rtmutex.c

locking/rtmutex: Use acquire/release semantics

2015-10-06 17:28:22 +02:00

rtmutex.h

rtmutex: Cleanup deadlock detector debug logic

2014-06-21 22:05:30 +02:00

rwsem-spinlock.c

locking/rwsem: Document barrier need when waking tasks

2015-02-18 16:57:10 +01:00

rwsem-xadd.c

locking/rwsem: Reduce spinlock contention in wakeup after up_read()/up_write()

2015-05-08 12:27:59 +02:00

rwsem.c

locking/rwsem: Set lock ownership ASAP

2015-02-18 16:57:13 +01:00

rwsem.h

locking/rwsem: Set lock ownership ASAP

2015-02-18 16:57:13 +01:00

semaphore.c

locking/semaphore: Resolve some shadow warnings

2014-09-04 07:17:24 +02:00

spinlock_debug.c

locking: Move the spinlock code to kernel/locking/

2013-11-06 07:55:21 +01:00

spinlock.c

spinlock: Add spin_lock_bh_nested()

2015-01-03 14:32:57 -05:00