netdev - [PATCH net-next] ipv6: exthdrs: Replace opencoded swap() implementation

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Date: Mon, 7 Aug 2023 10:09:47 +0800
From: Ziyang Xuan <william.xuanziyang@...wei.com>
To: <davem@...emloft.net>, <dsahern@...nel.org>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <netdev@...r.kernel.org>
CC: <adobriyan@...il.com>
Subject: [PATCH net-next] ipv6: exthdrs: Replace opencoded swap() implementation

Get a coccinelle warning as follows:
net/ipv6/exthdrs.c:800:29-30: WARNING opportunity for swap()

Use swap() to replace opencoded implementation.

Signed-off-by: Ziyang Xuan <william.xuanziyang@...wei.com>
---
 net/ipv6/exthdrs.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index f4bfccae003c..4952ae792450 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -648,7 +648,6 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
 	struct inet6_dev *idev = __in6_dev_get(skb->dev);
 	struct inet6_skb_parm *opt = IP6CB(skb);
 	struct in6_addr *addr = NULL;
-	struct in6_addr daddr;
 	int n, i;
 	struct ipv6_rt_hdr *hdr;
 	struct rt0_hdr *rthdr;
@@ -796,9 +795,7 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
 		return -1;
 	}
 
-	daddr = *addr;
-	*addr = ipv6_hdr(skb)->daddr;
-	ipv6_hdr(skb)->daddr = daddr;
+	swap(*addr, ipv6_hdr(skb)->daddr);
 
 	ip6_route_input(skb);
 	if (skb_dst(skb)->error) {
-- 
2.25.1