linux-kernel - [PATCH v2 07/10] block, bfq: remove redundant check in bfq_put

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Message-Id: <20221216111230.3638832-8-shikemeng@huaweicloud.com>
Date:   Fri, 16 Dec 2022 19:12:27 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     jack@...e.cz, paolo.valente@...aro.org, tj@...nel.org,
        josef@...icpanda.com, axboe@...nel.dk
Cc:     cgroups@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linfeilong@...wei.com,
        liuzhiqiang@...com, shikemeng@...weicloud.com
Subject: [PATCH v2 07/10] block, bfq: remove redundant check in bfq_put_cooperator

We have already avoided a circular list in bfq_setup_merge (see comments
in bfq_setup_merge() for details), so bfq_queue will not appear in it's
new_bfqq list. Just remove this check.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 block/bfq-iosched.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 7c91d16dbf6f..89995815dbae 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5273,8 +5273,6 @@ void bfq_put_cooperator(struct bfq_queue *bfqq)
 	 */
 	__bfqq = bfqq->new_bfqq;
 	while (__bfqq) {
-		if (__bfqq == bfqq)
-			break;
 		next = __bfqq->new_bfqq;
 		bfq_put_queue(__bfqq);
 		__bfqq = next;
-- 
2.30.0