linux-kernel - [PATCH] locking/test-ww

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Message-Id: <20211020091545.1039063-1-deng.changcheng@zte.com.cn>
Date:   Wed, 20 Oct 2021 09:15:45 +0000
From:   cgel.zte@...il.com
To:     longman@...hat.com
Cc:     mingo@...hat.com, will@...nel.org, boqun.feng@...il.com,
        linux-kernel@...r.kernel.org,
        Changcheng Deng <deng.changcheng@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] locking/test-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 | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c
index 353004155d65..fa021b8a9edc 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)
@@ -400,11 +400,8 @@ 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;
-		}
+		if (r != n)
+			swap(order[n], order[r]);
 	}
 
 	return order;
-- 
2.25.1