linux-kernel - [PATCH 19/20] block, bfq: remove unnecessary local variable __bfqq in bfq_setup

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Message-ID: <20221101093417.10540-20-shikemeng@huawei.com>
Date:   Tue, 1 Nov 2022 17:34:16 +0800
From:   Kemeng Shi <shikemeng@...wei.com>
To:     <paolo.valente@...aro.org>, <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <shikemeng@...wei.com>
Subject: [PATCH 19/20] block, bfq: remove unnecessary local variable __bfqq in bfq_setup_merge

We could traversal bfqq->new_bfqq list without a local variable easily and
intuitively. So remove unnecessary local variable __bfqq.

Signed-off-by: Kemeng Shi <shikemeng@...wei.com>
---
 block/bfq-iosched.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index d3f4d995f84a..589ab59abcf5 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -2741,7 +2741,6 @@ static struct bfq_queue *
 bfq_setup_merge(struct bfq_queue *bfqq, struct bfq_queue *new_bfqq)
 {
 	int process_refs, new_process_refs;
-	struct bfq_queue *__bfqq;
 
 	/*
 	 * If there are no process references on the new_bfqq, then it is
@@ -2753,10 +2752,9 @@ bfq_setup_merge(struct bfq_queue *bfqq, struct bfq_queue *new_bfqq)
 		return NULL;
 
 	/* Avoid a circular list and skip interim queue merges. */
-	while ((__bfqq = new_bfqq->new_bfqq)) {
-		if (__bfqq == bfqq)
+	while ((new_bfqq = new_bfqq->new_bfqq)) {
+		if (new_bfqq == bfqq)
 			return NULL;
-		new_bfqq = __bfqq;
 	}
 
 	process_refs = bfqq_process_refs(bfqq);
-- 
2.30.0