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Commit e9c60422 authored by Thomas Graf's avatar Thomas Graf Committed by David S. Miller
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[IPV4]: Avoid common branch misprediction while checking csum in ip_rcv() 



Signed-off-by: default avatarThomas Graf <tgraf@suug.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 58615242

net/ipv4/ip_input.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -400,7 +400,7 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, 




	iph = skb->nh.iph;

	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;

		goto inhdr_error;





	len = ntohs(iph->tot_len);

	len = ntohs(iph->tot_len);