Fix: compat_futex should work-around futex signal-restart kernel bug

[urcu.git] / compat_futex.c

diff --git a/compat_futex.c b/compat_futex.c
index b7f78f0b1c87a832cfb33c22e3a93845bbe7d3bb..9e918fe8e2aac035dc39e6e23868410348d02627 100644 (file)
--- a/compat_futex.c
+++ b/compat_futex.c
@@ -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.
  * _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,
  */
 
 int compat_futex_async(int32_t *uaddr, int op, int32_t val,