cfq-iosched: use op_is_sync instead of opencoding it

Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJens Axboe <axboe@fb.com>

block/cfq-iosched.c

@@ -911,15 +911,6 @@ static inline struct cfq_data *cic_to_cfqd(struct cfq_io_cq *cic)
 	return cic->icq.q->elevator->elevator_data;
 }
 
-/*
- * We regard a request as SYNC, if it's either a read or has the SYNC bit
- * set (in which case it could also be direct WRITE).
- */
-static inline bool cfq_bio_sync(struct bio *bio)
-{
-	return bio_data_dir(bio) == READ || (bio->bi_opf & REQ_SYNC);
-}
-
 /*
  * scheduler run of queue, if there are requests pending and no one in the
  * driver that will restart queueing
@@ -2490,7 +2481,7 @@ cfq_find_rq_fmerge(struct cfq_data *cfqd, struct bio *bio)
 	if (!cic)
 		return NULL;
 
-	cfqq = cic_to_cfqq(cic, cfq_bio_sync(bio));
+	cfqq = cic_to_cfqq(cic, op_is_sync(bio->bi_opf));
 	if (cfqq)
 		return elv_rb_find(&cfqq->sort_list, bio_end_sector(bio));
 
@@ -2604,13 +2595,14 @@ static int cfq_allow_bio_merge(struct request_queue *q, struct request *rq,
 			       struct bio *bio)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
+	bool is_sync = op_is_sync(bio->bi_opf);
 	struct cfq_io_cq *cic;
 	struct cfq_queue *cfqq;
 
 	/*
 	 * Disallow merge of a sync bio into an async request.
 	 */
-	if (cfq_bio_sync(bio) && !rq_is_sync(rq))
+	if (is_sync && !rq_is_sync(rq))
 		return false;
 
 	/*
@@ -2621,7 +2613,7 @@ static int cfq_allow_bio_merge(struct request_queue *q, struct request *rq,
 	if (!cic)
 		return false;
 
-	cfqq = cic_to_cfqq(cic, cfq_bio_sync(bio));
+	cfqq = cic_to_cfqq(cic, is_sync);
 	return cfqq == RQ_CFQQ(rq);
 }