Will Deacon 77e430e3e4 locking/qrwlock: Make use of _{acquire|release|relaxed}() atomics ...

The qrwlock implementation is slightly heavy in its use of memory
barriers, mainly through the use of _cmpxchg() and _return() atomics, which
imply full barrier semantics.

This patch modifies the qrwlock code to use the more relaxed atomic
routines so that we can reduce the unnecessary barrier overhead on
weakly-ordered architectures.

Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

2015-08-12 11:59:06 +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_proc.c

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

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

lockdep_states.h

…

lockdep.c

Merge branch 'sched-hrtimers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-06-24 15:09:40 -07:00

locktorture.c

locktorture: Change longdelay_us to longdelay_ms

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

Makefile

rtmutex: Delete scriptable tester

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

mcs_spinlock.h

locking/qspinlock: Introduce a simple generic 4-byte queued spinlock

2015-05-08 12:36:25 +02:00

mutex-debug.c

mutex: Always clear owner field upon mutex_unlock()

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

mutex-debug.h

…

mutex.c

locking/mutex: Further simplify mutex_spin_on_owner()

2015-04-09 08:10:23 +02:00

mutex.h

…

osq_lock.c

locking: Remove ACCESS_ONCE() usage

2015-02-24 08:44:16 +01:00

percpu-rwsem.c

…

qrwlock.c

locking/qrwlock: Make use of _{acquire|release|relaxed}() atomics

2015-08-12 11:59:06 +02:00

qspinlock_paravirt.h

locking/pvqspinlock: Only kick CPU at unlock time

2015-08-03 10:57:11 +02:00

qspinlock.c

locking/pvqspinlock: Only kick CPU at unlock time

2015-08-03 10:57:11 +02:00

rtmutex_common.h

rtmutex: Delete scriptable tester

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

rtmutex-debug.c

…

rtmutex-debug.h

…

rtmutex.c

rtmutex: Delete scriptable tester

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

rtmutex.h

…

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

…

spinlock_debug.c

…

spinlock.c

spinlock: Add spin_lock_bh_nested()

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