From e9c604227391308b185aa6b14c7f93b0a0c2e51b Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Sat, 20 Aug 2005 17:25:52 -0700 Subject: [PATCH] [IPV4]: Avoid common branch misprediction while checking csum in ip_rcv() Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/ipv4/ip_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 322b082ede1..6a06e15694d 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -400,7 +400,7 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, iph = skb->nh.iph; - if (ip_fast_csum((u8 *)iph, iph->ihl) != 0) + if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl))) goto inhdr_error; len = ntohs(iph->tot_len);