diff options
Diffstat (limited to 'block/blk-merge.c')
| -rw-r--r-- | block/blk-merge.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index ec727234ac48..893c1a60b701 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -383,7 +383,7 @@ void __blk_queue_split(struct request_queue *q, struct bio **bio, */ void blk_queue_split(struct bio **bio) { - struct request_queue *q = (*bio)->bi_bdev->bd_disk->queue; + struct request_queue *q = bdev_get_queue((*bio)->bi_bdev); unsigned int nr_segs; if (blk_may_split(q, *bio)) @@ -1067,9 +1067,8 @@ static enum bio_merge_status blk_attempt_bio_merge(struct request_queue *q, * @q: request_queue new bio is being queued at * @bio: new bio being queued * @nr_segs: number of segments in @bio - * @same_queue_rq: pointer to &struct request that gets filled in when - * another request associated with @q is found on the plug list - * (optional, may be %NULL) + * @same_queue_rq: output value, will be true if there's an existing request + * from the passed in @q already in the plug list * * Determine whether @bio being queued on @q can be merged with the previous * request on %current's plugged list. Returns %true if merge was successful, @@ -1085,26 +1084,28 @@ static enum bio_merge_status blk_attempt_bio_merge(struct request_queue *q, * Caller must ensure !blk_queue_nomerges(q) beforehand. */ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, - unsigned int nr_segs, struct request **same_queue_rq) + unsigned int nr_segs, bool *same_queue_rq) { struct blk_plug *plug; struct request *rq; plug = blk_mq_plug(q, bio); - if (!plug || list_empty(&plug->mq_list)) + if (!plug || rq_list_empty(plug->mq_list)) return false; /* check the previously added entry for a quick merge attempt */ - rq = list_last_entry(&plug->mq_list, struct request, queuelist); - if (rq->q == q && same_queue_rq) { + rq = rq_list_peek(&plug->mq_list); + if (rq->q == q) { /* * Only blk-mq multiple hardware queues case checks the rq in * the same queue, there should be only one such rq in a queue */ - *same_queue_rq = rq; + *same_queue_rq = true; + + if (blk_attempt_bio_merge(q, rq, bio, nr_segs, false) == + BIO_MERGE_OK) + return true; } - if (blk_attempt_bio_merge(q, rq, bio, nr_segs, false) == BIO_MERGE_OK) - return true; return false; } |