From e2a60da74fc8215c68509a89e9a69c66363153db Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Tue, 18 Sep 2012 12:19:25 -0400 Subject: block: Clean up special command handling logic Remove special-casing of non-rw fs style requests (discard). The nomerge flags are consolidated in blk_types.h, and rq_mergeable() and bio_mergeable() have been modified to use them. bio_is_rw() is used in place of bio_has_data() a few places. This is done to to distinguish true reads and writes from other fs type requests that carry a payload (e.g. write same). Signed-off-by: Martin K. Petersen Acked-by: Mike Snitzer Signed-off-by: Jens Axboe --- block/blk-merge.c | 22 +--------------------- 1 file changed, 1 insertion(+), 21 deletions(-) (limited to 'block/blk-merge.c') diff --git a/block/blk-merge.c b/block/blk-merge.c index e76279e41162..86710ca408b8 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -417,18 +417,6 @@ static int attempt_merge(struct request_queue *q, struct request *req, if (!rq_mergeable(req) || !rq_mergeable(next)) return 0; - /* - * Don't merge file system requests and discard requests - */ - if ((req->cmd_flags & REQ_DISCARD) != (next->cmd_flags & REQ_DISCARD)) - return 0; - - /* - * Don't merge discard requests and secure discard requests - */ - if ((req->cmd_flags & REQ_SECURE) != (next->cmd_flags & REQ_SECURE)) - return 0; - /* * not contiguous */ @@ -521,15 +509,7 @@ int blk_attempt_req_merge(struct request_queue *q, struct request *rq, bool blk_rq_merge_ok(struct request *rq, struct bio *bio) { - if (!rq_mergeable(rq)) - return false; - - /* don't merge file system requests and discard requests */ - if ((bio->bi_rw & REQ_DISCARD) != (rq->bio->bi_rw & REQ_DISCARD)) - return false; - - /* don't merge discard requests and secure discard requests */ - if ((bio->bi_rw & REQ_SECURE) != (rq->bio->bi_rw & REQ_SECURE)) + if (!rq_mergeable(rq) || !bio_mergeable(bio)) return false; /* different data direction or already started, don't merge */ -- cgit v1.2.3-70-g09d2