linux-kernel - [PATCH] locking/ww-mutex: use swap()

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Date:   Tue, 19 Oct 2021 03:22:39 +0000
From:   cgel.zte@...il.com
To:     mingo@...hat.com
Cc:     will@...nel.org, longman@...hat.com, boqun.feng@...il.com,
        linux-kernel@...r.kernel.org,
        Changcheng Deng <deng.changcheng@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] locking/ww-mutex: use swap()

From: Changcheng Deng <deng.changcheng@....com.cn>

Use swap() in order to make code cleaner. Issue found by coccinelle.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@....com.cn>
---
 kernel/locking/test-ww_mutex.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c
index 353004155d65..daad819fcd16 100644
--- a/kernel/locking/test-ww_mutex.c
+++ b/kernel/locking/test-ww_mutex.c
@@ -389,7 +389,7 @@ struct stress {
 static int *get_random_order(int count)
 {
 	int *order;
-	int n, r, tmp;
+	int n, r;
 
 	order = kmalloc_array(count, sizeof(*order), GFP_KERNEL);
 	if (!order)
@@ -401,9 +401,7 @@ static int *get_random_order(int count)
 	for (n = count - 1; n > 1; n--) {
 		r = get_random_int() % (n + 1);
 		if (r != n) {
-			tmp = order[n];
-			order[n] = order[r];
-			order[r] = tmp;
+			swap(order[n], order[r]);
 		}
 	}
 
-- 
2.25.1