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Fix: handle sys_futex() FUTEX_WAIT interrupted by signal
[userspace-rcu.git]
/
urcu
/
futex.h
diff --git
a/urcu/futex.h
b/urcu/futex.h
index 906d9b723ae88481fc7874e1409dc24dd80f35eb..b71563b7c90c5f3136d4e2517e4de95bb8576202 100644
(file)
--- a/
urcu/futex.h
+++ b/
urcu/futex.h
@@
-42,6
+42,9
@@
extern "C" {
*
* futex_async is signal-handler safe for the wakeup. It uses polling
* on the wait-side in compatibility mode.
+ *
+ * BEWARE: sys_futex() FUTEX_WAIT may return early if interrupted
+ * (returns EINTR).
*/
#ifdef CONFIG_RCU_HAVE_FUTEX
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