X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=mutex.c;h=9ee3bd838cb1ae801b71f2604f94441264130343;hp=9d10c2ce2fe056fefd300ebf16274f85701fa7c6;hb=6899b6cb0d996c530e42195cfc29e8e0b02aeae3;hpb=ef3c94b62e3f58cc23c3ad50450150c8474b4285

diff --git a/mutex.c b/mutex.c
index 9d10c2ce..9ee3bd83 100644
--- a/mutex.c
+++ b/mutex.c
@@ -162,14 +162,19 @@ void fio_mutex_down(struct fio_mutex *mutex)
 
 void fio_mutex_up(struct fio_mutex *mutex)
 {
+	int do_wake = 0;
+
 	assert(mutex->magic == FIO_MUTEX_MAGIC);
 
 	pthread_mutex_lock(&mutex->lock);
 	read_barrier();
 	if (!mutex->value && mutex->waiters)
-		pthread_cond_signal(&mutex->cond);
+		do_wake = 1;
 	mutex->value++;
 	pthread_mutex_unlock(&mutex->lock);
+
+	if (do_wake)
+		pthread_cond_signal(&mutex->cond);
 }
 
 void fio_rwlock_write(struct fio_rwlock *lock)