diff --git a/[refs] b/[refs]
index eadebb90694b..d79317bc0c1d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5b10ca19ea4859d3884d10a3eb8495de92089792
+refs/heads/master: 149a051f82d2b3860fe32fa182dbc83a66274894
diff --git a/trunk/block/as-iosched.c b/trunk/block/as-iosched.c
index b201d16a7102..96036846a001 100644
--- a/trunk/block/as-iosched.c
+++ b/trunk/block/as-iosched.c
@@ -1275,9 +1275,13 @@ static void as_merged_requests(struct request_queue *q, struct request *req,
 			 * Don't copy here but swap, because when anext is
 			 * removed below, it must contain the unused context
 			 */
-			double_spin_lock(&rioc->lock, &nioc->lock, rioc < nioc);
-			swap_io_context(&rioc, &nioc);
-			double_spin_unlock(&rioc->lock, &nioc->lock, rioc < nioc);
+			if (rioc != nioc) {
+				double_spin_lock(&rioc->lock, &nioc->lock,
+								rioc < nioc);
+				swap_io_context(&rioc, &nioc);
+				double_spin_unlock(&rioc->lock, &nioc->lock,
+								rioc < nioc);
+			}
 		}
 	}