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Zqiang 5e14b8b268 locking/rtmutex: Fix incorrect condition in rtmutex_spin_on_owner() 
commit 8f556a326c93213927e683fc32bbf5be1b62540a upstream.

Optimistic spinning needs to be terminated when the spinning waiter is not
longer the top waiter on the lock, but the condition is negated. It
terminates if the waiter is the top waiter, which is defeating the whole
purpose.

Fixes: c3123c431447 ("locking/rtmutex: Dont dereference waiter lockless")
Signed-off-by: Zqiang <qiang1.zhang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211217074207.77425-1-qiang1.zhang@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-22 09:32:48 +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
locking/lockdep: Rework FS_RECLAIM annotation
2017-08-10 12:29:03 +02:00
lockdep.c
lockdep: Let lock_is_held_type() detect recursive read as read
2021-11-18 19:16:23 +01:00
locktorture.c
locktorture: Count lock readers
2021-07-27 11:39:30 -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/ww_mutex: Initialize waiter.ww_ctx properly
2021-08-20 12:15:54 +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: Fix incorrect condition in rtmutex_spin_on_owner()
2021-12-22 09:32:48 +01:00
rwbase_rt.c
locking/rwbase: Take care of ordering guarantee for fastpath reader
2021-09-15 17:49:16 +02:00
rwsem.c
locking/rwsem: Make handoff bit handling more consistent
2021-12-01 09:04:54 +01:00
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/spinlock/rt: Prepare for RT local_lock
2021-08-17 19:06:13 +02:00
spinlock.c
locking/rwlock: Provide RT variant
2021-08-17 17:50:51 +02:00
test-ww_mutex.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 9
2019-05-21 11:28:40 +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
locking/ww_mutex: Implement rtmutex based ww_mutex API functions
2021-08-17 19:05:26 +02:00