blk-mq: remove unnecessary judgement from blk_mq_make_request

[胡海]

Author: huhai <hu...@kylinos.cn>
Date:   Tue May 15 15:15:06 2018 +0800

    blk-mq: remove unnecessary judgement from blk_mq_make_request
    
    Whether q->elevator is true or not, we can use blk_mq_sched_insert_request 
to complete the work.
    
    Signed-off-by: huhai <hu...@kylinos.cn>

diff --git a/block/blk-mq.c b/block/blk-mq.c
index fcf2f16..2545081 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1580,15 +1580,6 @@ static void blk_mq_bio_to_request(struct request *rq, 
struct bio *bio)
        blk_account_io_start(rq, true);
 }
 
-static inline void blk_mq_queue_io(struct blk_mq_hw_ctx *hctx,
-                                  struct blk_mq_ctx *ctx,
-                                  struct request *rq)
-{
-       spin_lock(&ctx->lock);
-       __blk_mq_insert_request(hctx, rq, false);
-       spin_unlock(&ctx->lock);
-}
-
 static blk_qc_t request_to_qc_t(struct blk_mq_hw_ctx *hctx, struct request *rq)
 {
        if (rq->tag != -1)
@@ -1775,15 +1766,10 @@ static blk_qc_t blk_mq_make_request(struct 
request_queue *q, struct bio *bio)
                blk_mq_put_ctx(data.ctx);
                blk_mq_bio_to_request(rq, bio);
                blk_mq_try_issue_directly(data.hctx, rq, &cookie);
-       } else if (q->elevator) {
+       } else  {
                blk_mq_put_ctx(data.ctx);
                blk_mq_bio_to_request(rq, bio);
                blk_mq_sched_insert_request(rq, false, true, true, true);
-       } else {
-               blk_mq_put_ctx(data.ctx);
-               blk_mq_bio_to_request(rq, bio);
-               blk_mq_queue_io(data.hctx, data.ctx, rq);
-               blk_mq_run_hw_queue(data.hctx, true);
        }
 
        return cookie;