Peter Zijlstra 02ea9fc96f locking/rtmutex: Squash self-deadlock check for ww_rt_mutex. ...

Similar to the issues in commits:

  6467822b8c ("locking/rtmutex: Prevent spurious EDEADLK return caused by ww_mutexes")
  a055fcc132 ("locking/rtmutex: Return success on deadlock for ww_mutex waiters")

ww_rt_mutex_lock() should not return EDEADLK without first going through
the __ww_mutex logic to set the required state. In fact, the chain-walk
can deal with the spurious cycles (per the above commits) this check
warns about and is trying to avoid.

Therefore ignore this test for ww_rt_mutex and simply let things fall
in place.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20211129174654.668506-4-bigeasy@linutronix.de

2021-12-04 10:56:23 +01:00

..

irqflag-debug.c

lockdep: Noinstr annotate warn_bogus_irq_restore()

2021-02-10 14:44:39 +01:00

lock_events_list.h

locking/rwsem: Remove reader optimistic spinning

2020-12-09 17:08:48 +01:00

lock_events.c

locking/lock_events: Don't show pvqspinlock events on bare metal

2019-04-10 10:56:05 +02:00

lock_events.h

locking/lock_events: Use raw_cpu_{add,inc}() for stats

2019-06-03 12:32:56 +02:00

lockdep_internals.h

lockdep: Allow tuning tracing capacity constants.

2021-04-05 20:33:57 +09:00

lockdep_proc.c

locking/lockdep: Fix meaningless /proc/lockdep output of lock classes on !CONFIG_PROVE_LOCKING

2021-07-05 10:44:52 +02:00

lockdep_states.h

…

lockdep.c

Merge branch 'akpm' (patches from Andrew)

2021-11-09 10:11:53 -08:00

locktorture.c

locktorture: Warn on individual lock_torture_init() error conditions

2021-09-13 16:36:16 -07:00

Makefile

locking/ww_mutex: Implement rtmutex based ww_mutex API functions

2021-08-17 19:05:26 +02:00

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: Remove rcu_read_{,un}lock() for preempt_{dis,en}able()

2021-10-19 17:27:06 +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: Use this_cpu_{inc,dec}() for read_count

2020-09-16 16:26:56 +02:00

qrwlock.c

locking/qrwlock: Cleanup queued_write_lock_slowpath()

2021-05-06 15:33:49 +02:00

qspinlock_paravirt.h

Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-09-25 10:22:37 +02:00

qspinlock_stat.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30 11:26:37 -07:00

qspinlock.c

x86/kvm: Add "nopvspin" parameter to disable PV spinlocks

2020-07-08 16:21:57 -04:00

rtmutex_api.c

locking/rtmutex: Prevent lockdep false positive with PI futexes

2021-08-17 19:06:02 +02:00

rtmutex_common.h

locking/rtmutex: Dont dereference waiter lockless

2021-08-25 15:42:32 +02:00

rtmutex.c

locking/rtmutex: Squash self-deadlock check for ww_rt_mutex.

2021-12-04 10:56:23 +01:00

rwbase_rt.c

locking/rwbase: Optimize rwbase_read_trylock

2021-10-07 13:51:07 +02:00

rwsem.c

locking/rwsem: Fix comments about reader optimistic lock stealing conditions

2021-10-19 17:27:06 +02:00

semaphore.c

locking/semaphore: Add might_sleep() to down_*() family

2021-08-20 12:33:17 +02:00

spinlock_debug.c

locking/rwlock: Provide RT variant

2021-08-17 17:50:51 +02:00

spinlock_rt.c

locking: Remove rt_rwlock_is_contended().

2021-12-04 10:56:23 +01:00

spinlock.c

locking: Remove spin_lock_flags() etc

2021-10-30 16:37:28 +02:00

test-ww_mutex.c

locking/ww-mutex: Fix uninitialized use of ret in test_aa()

2021-10-01 13:57:49 +02:00

ww_mutex.h

locking/ww_mutex: Add rt_mutex based lock type and accessors

2021-08-17 19:05:11 +02:00

ww_rt_mutex.c

kernel/locking: Use a pointer in ww_mutex_trylock().

2021-11-17 14:48:49 +01:00