diff options
| author | Jens Axboe <axboe@kernel.dk> | 2018-10-12 20:39:10 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-07 21:42:33 +0100 |
| commit | 2081a56bfaadfbcec479d25c8f3120e2224a745d (patch) | |
| tree | 49cce1b37ad0e879f1a450717418339faf28a6e1 /block/blk-merge.c | |
| parent | block: kill request slab cache (diff) | |
| download | linux-2081a56bfaadfbcec479d25c8f3120e2224a745d.tar.xz linux-2081a56bfaadfbcec479d25c8f3120e2224a745d.zip | |
block: remove req_no_special_merge() from merging code
It'll always be false at this point, just remove it.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-merge.c')
| -rw-r--r-- | block/blk-merge.c | 25 |
1 files changed, 3 insertions, 22 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 3d073305da33..28c92b3098c0 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -595,17 +595,6 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req, return ll_new_hw_segment(q, req, bio); } -/* - * blk-mq uses req->special to carry normal driver per-request payload, it - * does not indicate a prepared command that we cannot merge with. - */ -static bool req_no_special_merge(struct request *req) -{ - struct request_queue *q = req->q; - - return !q->mq_ops && req->special; -} - static bool req_attempt_discard_merge(struct request_queue *q, struct request *req, struct request *next) { @@ -631,13 +620,6 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req, unsigned int seg_size = req->biotail->bi_seg_back_size + next->bio->bi_seg_front_size; - /* - * First check if the either of the requests are re-queued - * requests. Can't merge them if they are. - */ - if (req_no_special_merge(req) || req_no_special_merge(next)) - return 0; - if (req_gap_back_merge(req, next->bio)) return 0; @@ -757,8 +739,7 @@ static struct request *attempt_merge(struct request_queue *q, return NULL; if (rq_data_dir(req) != rq_data_dir(next) - || req->rq_disk != next->rq_disk - || req_no_special_merge(next)) + || req->rq_disk != next->rq_disk) return NULL; if (req_op(req) == REQ_OP_WRITE_SAME && @@ -885,8 +866,8 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) if (bio_data_dir(bio) != rq_data_dir(rq)) return false; - /* must be same device and not a special request */ - if (rq->rq_disk != bio->bi_disk || req_no_special_merge(rq)) + /* must be same device */ + if (rq->rq_disk != bio->bi_disk) return false; /* only merge integrity protected bio into ditto rq */ |