X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=compat_futex.c;h=dd5bf8a18b574ee06fd50c2d1560eca07dc1e39f;hb=refs%2Fheads%2Fstable-0.8;hp=0cc2956b66bcf35a5fe0786844e9d133743e6690;hpb=5b968b22cbf198656f2b9193675a631b1763cdd8;p=userspace-rcu.git

diff --git a/compat_futex.c b/compat_futex.c
index 0cc2956..dd5bf8a 100644
--- a/compat_futex.c
+++ b/compat_futex.c
@@ -54,7 +54,7 @@ pthread_cond_t __urcu_compat_futex_cond = PTHREAD_COND_INITIALIZER;
 int compat_futex_noasync(int32_t *uaddr, int op, int32_t val,
 	const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
 {
-	int ret, lockret;
+	int ret = 0, lockret;
 
 	/*
 	 * Check if NULL. Don't let users expect that they are taken into
@@ -111,6 +111,8 @@ end:
  * _ASYNC SIGNAL-SAFE_.
  * For now, timeout, uaddr2 and val3 are unused.
  * Waiter will busy-loop trying to read the condition.
+ * It is OK to use compat_futex_async() on a futex address on which
+ * futex() WAKE operations are also performed.
  */
 
 int compat_futex_async(int32_t *uaddr, int op, int32_t val,