tcp: Optimise GRO port comparisons
authorHerbert Xu <herbert@gondor.apana.org.au>
Tue, 26 May 2009 18:50:24 +0000 (18:50 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 27 May 2009 10:25:57 +0000 (03:25 -0700)
Instead of doing two 16-bit operations for the source/destination
ports, we can do one 32-bit operation to take care both.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp.c

index 7a0f0b27bf1f0affc18e57c96b7c002aa5376fcc..ff6adecc54c66e04b0b1ead721bf006e90396234 100644 (file)
@@ -2544,7 +2544,7 @@ struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 
                th2 = tcp_hdr(p);
 
-               if ((th->source ^ th2->source) | (th->dest ^ th2->dest)) {
+               if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
                        NAPI_GRO_CB(p)->same_flow = 0;
                        continue;
                }