diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2021-09-28 17:00:05 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-01 13:57:52 +0200 |
| commit | 8fe46535e10dbfebad68ad9f2f8260e49f5852c9 (patch) | |
| tree | 61f75ddf6d378281b629f1390583cc67a54fba7d /kernel/locking | |
| parent | ef1f4804b27a54da34de6984d16f1fe8f2cc7011 (diff) | |
| download | linux-8fe46535e10dbfebad68ad9f2f8260e49f5852c9.tar.gz | |
rtmutex: Check explicit for TASK_RTLOCK_WAIT.
rt_mutex_wake_q_add() needs to need to distiguish between sleeping
locks (TASK_RTLOCK_WAIT) and normal locks which use TASK_NORMAL to use
the proper wake mechanism.
Instead of checking for != TASK_NORMAL make it more robust and check
explicit for TASK_RTLOCK_WAIT which is the reason why a different wake
mechanism is used.
No functional change.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210928150006.597310-2-bigeasy@linutronix.de
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/rtmutex.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 6bb116c559b4a..cafc259ec59d3 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -449,7 +449,7 @@ static __always_inline void rt_mutex_adjust_prio(struct task_struct *p) static __always_inline void rt_mutex_wake_q_add(struct rt_wake_q_head *wqh, struct rt_mutex_waiter *w) { - if (IS_ENABLED(CONFIG_PREEMPT_RT) && w->wake_state != TASK_NORMAL) { + if (IS_ENABLED(CONFIG_PREEMPT_RT) && w->wake_state == TASK_RTLOCK_WAIT) { if (IS_ENABLED(CONFIG_PROVE_LOCKING)) WARN_ON_ONCE(wqh->rtlock_task); get_task_struct(w->task); |