Messages in this thread Patch in this message | | | From | qiang.zhang@windrive ... | Subject | [PATCH] locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal | Date | Sat, 15 May 2021 10:30:10 +0800 |
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From: Zqiang <qiang.zhang@windriver.com>
Clear MUTEX_FLAGS when call mutex_lock_interruptible() interrupted by a signal and the lock->wait_list is empty.
Signed-off-by: Zqiang <qiang.zhang@windriver.com> --- kernel/locking/mutex.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index cb6b112ce155..4ac354ca092b 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -1081,6 +1081,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, err: __set_current_state(TASK_RUNNING); mutex_remove_waiter(lock, &waiter, current); + if (likely(list_empty(&lock->wait_list))) + __mutex_clear_flag(lock, MUTEX_FLAGS); err_early_kill: spin_unlock(&lock->wait_lock); debug_mutex_free_waiter(&waiter); -- 2.25.1
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