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linux-stable/kernel/locking
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Sebastian Andrzej Siewior af9f006393 locking/rtmutex: Avoid unconditional slowpath for DEBUG_RT_MUTEXES 
With DEBUG_RT_MUTEXES enabled the fast-path rt_mutex_cmpxchg_acquire()
always fails and all lock operations take the slow path.

Provide a new helper inline rt_mutex_try_acquire() which maps to
rt_mutex_cmpxchg_acquire() in the non-debug case. For the debug case
it invokes rt_mutex_slowtrylock() which can acquire a non-contended
rtmutex under full debug coverage.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230908162254.999499-3-bigeasy@linutronix.de
 		2023-09-20 09:31:11 +02:00
..
Makefile lockdep: allow instrumenting lockdep.c with KMSAN 2022-12-11 18:12:11 -08:00
irqflag-debug.c lockdep: Noinstr annotate warn_bogus_irq_restore() 2021-02-10 14:44:39 +01:00
lock_events.c
…
lock_events.h locking: add lockevent_read() prototype 2023-06-09 17:44:15 -07:00
lock_events_list.h locking/rwsem: Remove reader optimistic spinning 2020-12-09 17:08:48 +01:00
lockdep.c lockdep: fix static memory detection even more 2023-08-21 13:46:24 -07:00
lockdep_internals.h locking/lockdep: Iterate lock_classes directly when reading lockdep files 2022-02-16 15:57:58 +01:00
lockdep_proc.c locking/lockdep: Iterate lock_classes directly when reading lockdep files 2022-02-16 15:57:58 +01:00
lockdep_states.h
…
locktorture.c torture: Add lock_torture writer_fifo module parameter 2023-08-14 15:01:07 -07:00
mcs_spinlock.h locking: Fix typos in comments 2021-03-22 02:45:52 +01:00
mutex-debug.c locking/ww_mutex: Gather mutex_waiter initialization 2021-08-17 19:04:41 +02:00
mutex.c locking/mutex: Make contention tracepoints more consistent wrt adaptive spinning 2022-04-05 10:24:36 +02:00
mutex.h locking/mutex: Move the 'struct mutex_waiter' definition from <linux/mutex.h> to the internal header 2021-08-17 18:24:31 +02:00
osq_lock.c locking: Fix typos in comments 2021-03-22 02:45:52 +01:00
percpu-rwsem.c locking/percpu-rwsem: Add percpu_is_write_locked() and percpu_is_read_locked() 2022-08-30 10:56:23 +02:00
qrwlock.c locking: Add __lockfunc to slow path functions 2022-08-19 19:47:51 +02:00
qspinlock.c locking/qspinlock: Micro-optimize pending state waiting for unlock 2023-01-05 11:01:50 +01:00
qspinlock_paravirt.h x86/qspinlock-paravirt: Fix missing-prototype warning 2023-08-03 17:15:05 +02:00
qspinlock_stat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
rtmutex.c locking/rtmutex: Avoid unconditional slowpath for DEBUG_RT_MUTEXES 2023-09-20 09:31:11 +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
rwbase_rt.c locking/rwbase: Mitigate indefinite writer starvation 2023-04-29 09:08:52 +02:00
rwsem.c locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers 2023-05-08 10:58:24 +02:00
semaphore.c locking: Add __sched to semaphore functions 2022-09-15 16:14:03 +02:00
spinlock.c locking/spinlocks: Mark spinlocks noinline when inline spinlocks are disabled 2022-08-04 11:05:43 +02:00
spinlock_debug.c locking/rwlock: Provide RT variant 2021-08-17 17:50:51 +02:00
spinlock_rt.c locking/rwlocks: introduce write_lock_nested 2022-01-22 08:33:37 +02:00
test-ww_mutex.c locking: Reduce the number of locks in ww_mutex stress tests 2023-03-27 11:16:01 -07:00
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