linux-kernel - [PATCH 1/2] net: ipv4: route.c: add likely() statements

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Date:   Wed, 24 Mar 2021 11:09:22 +0800
From:   Yejune Deng <yejune.deng@...il.com>
To:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        yejune@...il.com, Yejune Deng <yejune.deng@...il.com>
Subject: [PATCH 1/2] net: ipv4: route.c: add likely() statements

Add likely() statements in ipv4_confirm_neigh() for 'rt->rt_gw_family
== AF_INET'.

Signed-off-by: Yejune Deng <yejune.deng@...il.com>
---
 net/ipv4/route.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index fa68c2612252..5762d9bc671c 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -440,7 +440,7 @@ static void ipv4_confirm_neigh(const struct dst_entry *dst, const void *daddr)
 	struct net_device *dev = dst->dev;
 	const __be32 *pkey = daddr;
 
-	if (rt->rt_gw_family == AF_INET) {
+	if (likely(rt->rt_gw_family == AF_INET)) {
 		pkey = (const __be32 *)&rt->rt_gw4;
 	} else if (rt->rt_gw_family == AF_INET6) {
 		return __ipv6_confirm_neigh_stub(dev, &rt->rt_gw6);
-- 
2.29.0