diff --git a/[refs] b/[refs]
index fd05c21edae6..ea623363b57d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d1a76187a5be4f89c6cb19d800cb5fb7aac735c5
+refs/heads/master: d98d38f2014ab79f28c126ff175d034891f7aefc
diff --git a/trunk/include/linux/mutex.h b/trunk/include/linux/mutex.h
index bc6da10ceee0..7a0e5c4f8072 100644
--- a/trunk/include/linux/mutex.h
+++ b/trunk/include/linux/mutex.h
@@ -144,6 +144,8 @@ extern int __must_check mutex_lock_killable(struct mutex *lock);
 /*
  * NOTE: mutex_trylock() follows the spin_trylock() convention,
  *       not the down_trylock() convention!
+ *
+ * Returns 1 if the mutex has been acquired successfully, and 0 on contention.
  */
 extern int mutex_trylock(struct mutex *lock);
 extern void mutex_unlock(struct mutex *lock);