linux-kernel - [PATCH] locking/ww-mutex: use swap() to make code cleaner

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Date:   Thu,  4 Nov 2021 08:18:46 +0800
From:   davidcomponentone@...il.com
To:     peterz@...radead.org
Cc:     davidcomponentone@...il.com, mingo@...hat.com, will@...nel.org,
        longman@...hat.com, boqun.feng@...il.com,
        linux-kernel@...r.kernel.org, Yang Guang <yang.guang5@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] locking/ww-mutex: use swap() to make code cleaner

From: Yang Guang <yang.guang5@....com.cn>

Use the macro 'swap()' defined in 'include/linux/minmax.h' to avoid
opencoding it.

Signed-off-by: Yang Guang <yang.guang5@....com.cn>
Reported-by: Zeal Robot <zealci@....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]);
 		}
 	}
 
-- 
2.30.2