Address the following coccicheck warning:
net/ipv6/exthdrs.c:620:44-45: WARNING opportunity for swap()

by using swap() for the swapping of variable values and drop
the tmp (`addr`) variable that is not needed any more.

Signed-off-by: Guo Zhengkui <guozhengkui@vivo.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 658d5eabaf7e..a2094aa1cb32 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -487,7 +487,6 @@ static int ipv6_rpl_srh_rcv(struct sk_buff *skb)
 	struct net *net = dev_net(skb->dev);
 	struct inet6_dev *idev;
 	struct ipv6hdr *oldhdr;
-	struct in6_addr addr;
 	unsigned char *buf;
 	int accept_rpl_seg;
 	int i, err;
@@ -616,9 +615,7 @@ static int ipv6_rpl_srh_rcv(struct sk_buff *skb)
 		return -1;
 	}
 
-	addr = ipv6_hdr(skb)->daddr;
-	ipv6_hdr(skb)->daddr = ohdr->rpl_segaddr[i];
-	ohdr->rpl_segaddr[i] = addr;
+	swap(ipv6_hdr(skb)->daddr, ohdr->rpl_segaddr[i]);
 
 	ipv6_rpl_srh_compress(chdr, ohdr, &ipv6_hdr(skb)->daddr, n);
 
-- 
2.20.1

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Tue, 12 Apr 2022 11:20:58 +0800 you wrote:
> Address the following coccicheck warning:
> net/ipv6/exthdrs.c:620:44-45: WARNING opportunity for swap()
> 
> by using swap() for the swapping of variable values and drop
> the tmp (`addr`) variable that is not needed any more.
> 
> Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com>
> 
> [...]

Here is the summary with links:
  - ipv6: exthdrs: use swap() instead of open coding it
    https://git.kernel.org/netdev/net-next/c/5ee6ad1dcae8

You are awesome, thank you!
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