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

[davidcomponentone]

From: Yang Guang <yang.guang5@xxxxxxxxxx>

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

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: Yang Guang <yang.guang5@xxxxxxxxxx>
---
 net/ipv6/ah6.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 828e62514260..b5995c1f4d7a 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -175,7 +175,6 @@ static void ipv6_rearrange_destopt(struct ipv6hdr *iph, struct ipv6_opt_hdr *des
 			 * See 11.3.2 of RFC 3775 for details.
 			 */
 			if (opt[off] == IPV6_TLV_HAO) {
-				struct in6_addr final_addr;
 				struct ipv6_destopt_hao *hao;
 
 				hao = (struct ipv6_destopt_hao *)&opt[off];
@@ -184,9 +183,7 @@ static void ipv6_rearrange_destopt(struct ipv6hdr *iph, struct ipv6_opt_hdr *des
 							     hao->length);
 					goto bad;
 				}
-				final_addr = hao->addr;
-				hao->addr = iph->saddr;
-				iph->saddr = final_addr;
+				swap(hao->addr, iph->saddr);
 			}
 			break;
 		}
-- 
2.30.2