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- Fix the condition checking when the optimistic spinning of a waiter needs 

to be terminated
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Merge tag 'locking_urgent_for_v5.16_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fix from Borislav Petkov:

 - Fix the rtmutex condition checking when the optimistic spinning of a
   waiter needs to be terminated

* tag 'locking_urgent_for_v5.16_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rtmutex: Fix incorrect condition in rtmutex_spin_on_owner()
This commit is contained in:
Linus Torvalds 2021-12-19 12:17:26 -08:00
parent c36d891d78 8f556a326c
commit 909e1d166c
1 changed files with 1 additions and 1 deletions
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2
kernel/locking/rtmutex.c
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@ -1380,7 +1380,7 @@ static bool rtmutex_spin_on_owner(struct rt_mutex_base *lock,
* - the VCPU on which owner runs is preempted
*/
if (!owner->on_cpu || need_resched() ||
rt_mutex_waiter_is_top_waiter(lock, waiter) ||
!rt_mutex_waiter_is_top_waiter(lock, waiter) ||
vcpu_is_preempted(task_cpu(owner))) {
res = false;
break;