[4/4] elevator: use list_is_{first,last}

Commit Message

Geliang Tang Dec. 10, 2015, 2:20 p.m. UTC

For better readability, use list_is_{first,last}() instead of open-coded.

Signed-off-by: Geliang Tang <[e-mail]>
---
 block/noop-iosched.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/block/noop-iosched.c b/block/noop-iosched.c
index a163c48..d44326e 100644
--- a/block/noop-iosched.c
+++ b/block/noop-iosched.c
@@ -44,7 +44,7 @@  noop_former_request(struct request_queue *q, struct request *rq)
 {
 	struct noop_data *nd = q->elevator->elevator_data;
 
-	if (rq->queuelist.prev == &nd->queue)
+	if (list_is_first(&rq->queuelist, &nd->queue))
 		return NULL;
 	return list_prev_entry(rq, queuelist);
 }
@@ -54,7 +54,7 @@  noop_latter_request(struct request_queue *q, struct request *rq)
 {
 	struct noop_data *nd = q->elevator->elevator_data;
 
-	if (rq->queuelist.next == &nd->queue)
+	if (list_is_last(&rq->queuelist, &nd->queue))
 		return NULL;
 	return list_next_entry(rq, queuelist);
 }