[SK_BUFF]: export skb_pull_rcsum

*** Warning: "skb_pull_rcsum" [net/bridge/bridge.ko] undefined!
*** Warning: "skb_pull_rcsum" [net/8021q/8021q.ko] undefined!
*** Warning: "skb_pull_rcsum" [drivers/net/pppoe.ko] undefined!
*** Warning: "skb_pull_rcsum" [drivers/net/ppp_generic.ko] undefined!
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/skbuff.c

@@ -1816,6 +1816,8 @@ unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len)
 	return skb->data += len;
 }
 
+EXPORT_SYMBOL_GPL(skb_pull_rcsum);
+
 void __init skb_init(void)
 {
 	skbuff_head_cache = kmem_cache_create("skbuff_head_cache",