linux-kernel - [PATCH 17/17] block, bfq: remove unnecessary local variable __bfqq in bfq_setup

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Date:   Sun, 19 Feb 2023 18:43:09 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     paolo.valente@...aro.org, axboe@...nel.dk, jack@...e.cz
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        shikemeng@...weicloud.com
Subject: [PATCH 17/17] 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@...weicloud.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 2705a24ab146..037f73a25567 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -2752,7 +2752,6 @@ 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
@@ -2764,10 +2763,9 @@ 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