linux-kernel - [PATCH 2/3] blk-mq: Eliminate superfluous check of BLK_MQ_S_TAG

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Date:	Wed,  3 Sep 2014 22:33:06 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 2/3] blk-mq: Eliminate superfluous check of BLK_MQ_S_TAG_ACTIVE flag

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
Cc: Jens Axboe <axboe@...nel.dk>
---
 block/blk-mq-tag.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 4953b64..d1eb579 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -60,8 +60,7 @@ static inline void bt_index_atomic_inc(atomic_t *index)
  */
 void __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
 {
-	if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state) &&
-	    !test_and_set_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
+	if (!test_and_set_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
 		atomic_inc(&hctx->tags->active_queues);
 }
 
-- 
1.9.3

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