[IPV4]: Avoid common branch misprediction while checking csum in ip_r…

…cv() Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
git-mirror · Aug 29, 2005 · e9c6042 · e9c6042
1 parent 5861524
commit e9c6042
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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);