[PATCH] kernel:locking: use swap() to make code cleaner

[cgel . zte]

From: chiminghao <chi.minghao@xxxxxxxxxx>

Fix the following coccicheck REVIEW:
Use swap() instead of reimplementing it.

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: chiminghao <chi.minghao@xxxxxxxxxx>
---
 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