linux-kernel - [PATCH linux-next] loop: Remove redundant assignments and parentheses

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Message-Id: <20211208075452.404867-1-luo.penghao@zte.com.cn>
Date:   Wed,  8 Dec 2021 07:54:52 +0000
From:   cgel.zte@...il.com
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        luo penghao <luo.penghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH linux-next] loop: Remove redundant assignments and parentheses

From: luo penghao <luo.penghao@....com.cn>

The assignment of node has been done during initialization, and
the parentheses are meaningless according to the priority.

drivers/block/loop.c:1001:19: warning
Value stored to 'node' during its initialization is never read

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: luo penghao <luo.penghao@....com.cn>
---
 drivers/block/loop.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index dfc72a1..0b74cbe 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -985,7 +985,7 @@ static inline int queue_on_root_worker(struct cgroup_subsys_state *css)
 
 static void loop_queue_work(struct loop_device *lo, struct loop_cmd *cmd)
 {
-	struct rb_node **node = &(lo->worker_tree.rb_node), *parent = NULL;
+	struct rb_node **node = &lo->worker_tree.rb_node, *parent = NULL;
 	struct loop_worker *cur_worker, *worker = NULL;
 	struct work_struct *work;
 	struct list_head *cmd_list;
@@ -995,8 +995,6 @@ static void loop_queue_work(struct loop_device *lo, struct loop_cmd *cmd)
 	if (queue_on_root_worker(cmd->blkcg_css))
 		goto queue_work;
 
-	node = &lo->worker_tree.rb_node;
-
 	while (*node) {
 		parent = *node;
 		cur_worker = container_of(*node, struct loop_worker, rb_node);
-- 
2.15.2