[PATCH] elevator: add fall through comment

[Geliang Tang]

Add fall through comment for ELEVATOR_INSERT_SORT_MERGE.

Signed-off-by: Geliang Tang <geliangt...@gmail.com>
---
 block/elevator.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/elevator.c b/block/elevator.c
index 40f0c04..6db8f89 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -638,6 +638,7 @@ void __elv_add_request(struct request_queue *q, struct 
request *rq, int where)
                 */
                if (elv_attempt_insert_merge(q, rq))
                        break;
+               /* Fall through */
        case ELEVATOR_INSERT_SORT:
                BUG_ON(rq->cmd_type != REQ_TYPE_FS);
                rq->rq_flags |= RQF_SORTED;
-- 
2.9.3