[PATCH] skb_pull add unlikely

[Stephen Hemminger <shemminger@xxxxxxxx>]

Yet another case where giving compiler hints may speed up packet fast path.


diff -Nru a/include/linux/skbuff.h b/include/linux/skbuff.h
--- a/include/linux/skbuff.h    Thu Aug  7 14:20:09 2003
+++ b/include/linux/skbuff.h    Thu Aug  7 14:20:09 2003
@@ -883,7 +883,7 @@
  */
 static inline unsigned char *skb_pull(struct sk_buff *skb, unsigned int len)
 {
-       return (len > skb->len) ? NULL : __skb_pull(skb, len);
+       return unlikely(len > skb->len) ? NULL : __skb_pull(skb, len);
 }
 
 extern unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta);