[IPV4]: Avoid common branch misprediction while checking csum in ip_rcv()

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 322b082ede1e..6a06e15694dc 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);