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authorYufen Yu <yuyufen@huawei.com>2020-10-08 23:26:33 -0400
committerJens Axboe <axboe@kernel.dk>2020-10-09 12:35:39 -0600
commitc728152413312de6c95731a845d30c9ae735d656 (patch)
tree0a5e0f4255a52e681d3137353bf14c01b79950db
parent0546858c59fb90122ca8c820e6aa221925a13bd8 (diff)
blk-mq: get rid of the dead flush handle code path
After commit 923218f6166a ("blk-mq: don't allocate driver tag upfront for flush rq"), blk_mq_submit_bio() will call blk_insert_flush() directly to handle flush request rather than blk_mq_sched_insert_request() in the case of elevator. Then, all flush request either have set RQF_FLUSH_SEQ flag when call blk_mq_sched_insert_request(), or have inserted into hctx->dispatch. So, remove the dead code path. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/blk-mq-sched.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index e7a690ae86c9..d1eafe2c045c 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -422,12 +422,6 @@ void blk_mq_sched_insert_request(struct request *rq, bool at_head,
struct blk_mq_ctx *ctx = rq->mq_ctx;
struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
- /* flush rq in flush machinery need to be dispatched directly */
- if (!(rq->rq_flags & RQF_FLUSH_SEQ) && op_is_flush(rq->cmd_flags)) {
- blk_insert_flush(rq);
- goto run;
- }
-
WARN_ON(e && (rq->tag != BLK_MQ_NO_TAG));
if (blk_mq_sched_bypass_insert(hctx, !!e, rq)) {