Uros Bizjak fea0e1820b locking/pvqspinlock: Use try_cmpxchg() in qspinlock_paravirt.h ...

Use try_cmpxchg(*ptr, &old, new) instead of
cmpxchg(*ptr, old, new) == old in qspinlock_paravirt.h
x86 CMPXCHG instruction returns success in ZF flag, so
this change saves a compare after cmpxchg.

No functional change intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Waiman Long <longman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240411192317.25432-2-ubizjak@gmail.com

2024-04-12 11:42:39 +02:00

..

irqflag-debug.c

…

lock_events_list.h

…

lock_events.c

locking/debug: Fix debugfs API return value checks to use IS_ERR()

2023-10-03 10:11:25 +02:00

lock_events.h

locking/qspinlock: Always evaluate lockevent* non-event parameter once

2024-03-21 20:45:17 +01:00

lockdep_internals.h

…

lockdep_proc.c

locking/lockdep: Fix string sizing bug that triggers a format-truncation compiler-warning

2023-10-12 20:37:59 +02:00

lockdep_states.h

…

lockdep.c

lockdep: Fix block chain corruption

2023-11-24 11:04:54 +01:00

locktorture.c

locktorture: Increase Hamming distance between call_rcu_chain and rcu_call_chains

2023-11-23 11:58:18 +05:30

Makefile

lockdep: allow instrumenting lockdep.c with KMSAN

2022-12-11 18:12:11 -08:00

mcs_spinlock.h

…

mutex-debug.c

…

mutex.c

locking/mutex: Document that mutex_unlock() is non-atomic

2023-12-01 11:27:43 +01:00

mutex.h

…

osq_lock.c

locking/osq_lock: Clarify osq_wait_next()

2023-12-30 10:25:51 -08:00

percpu-rwsem.c

locking/percpu-rwsem: Trigger contention tracepoints only if contended

2024-02-28 13:10:29 +01:00

qrwlock.c

locking: Add __lockfunc to slow path functions

2022-08-19 19:47:51 +02:00

qspinlock_paravirt.h

locking/pvqspinlock: Use try_cmpxchg() in qspinlock_paravirt.h

2024-04-12 11:42:39 +02:00

qspinlock_stat.h

…

qspinlock.c

locking/qspinlock: Use atomic_try_cmpxchg_relaxed() in xchg_tail()

2024-04-11 15:14:54 +02:00

rtmutex_api.c

locking/rtmutex: Fix task->pi_waiters integrity

2023-07-17 13:59:10 +02:00

rtmutex_common.h

locking/rtmutex: Fix task->pi_waiters integrity

2023-07-17 13:59:10 +02:00

rtmutex.c

locking/rtmutex: Use try_cmpxchg_relaxed() in mark_rt_mutex_waiters()

2024-03-01 13:02:05 +01:00

rwbase_rt.c

locking/rtmutex: Add a lockdep assert to catch potential nested blocking

2023-09-20 09:31:14 +02:00

rwsem.c

locking/rwsem: Clarify that RWSEM_READER_OWNED is just a hint

2024-02-28 13:08:38 +01:00

semaphore.c

locking: Add __sched to semaphore functions

2022-09-15 16:14:03 +02:00

spinlock_debug.c

sched.h: move pid helpers to pid.h

2023-12-20 19:26:31 -05:00

spinlock_rt.c

locking/rtmutex: Add a lockdep assert to catch potential nested blocking

2023-09-20 09:31:14 +02:00

spinlock.c

locking/spinlocks: Mark spinlocks noinline when inline spinlocks are disabled

2022-08-04 11:05:43 +02:00

test-ww_mutex.c

locking/ww_mutex/test: Make sure we bail out instead of livelock

2023-09-22 09:43:41 +02:00

ww_mutex.h

locking/rtmutex: Fix task->pi_waiters integrity

2023-07-17 13:59:10 +02:00

ww_rt_mutex.c

locking/rtmutex: Avoid unconditional slowpath for DEBUG_RT_MUTEXES

2023-09-20 09:31:11 +02:00