1 files changed, 1 insertions, 1 deletions

diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt
index 4e17beba2379..1f506f7830ec 100644
--- a/Documentation/memory-barriers.txt
+++ b/Documentation/memory-barriers.txt
@@ -1493,7 +1493,7 @@ explicit lock operations, described later).  These include:
         atomic_dec_and_test();
         atomic_sub_and_test();
         atomic_add_negative();
-        atomic_add_unless();
+        atomic_add_unless();    /* when succeeds (returns 1) */
         test_and_set_bit();
         test_and_clear_bit();
         test_and_change_bit();