[SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index 099543f..dcc2e4b 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -848,7 +848,7 @@
 
 static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len)
 {
-	struct iphdr *ip = skb->nh.iph;
+	struct iphdr *ip = ip_hdr(skb);
 	unsigned char stn = ntohl(ip->saddr) & 0xff;
 	struct sock *sk;
 	struct sk_buff *newskb;
@@ -946,7 +946,7 @@
 	data = skb->h.raw + sizeof(struct udphdr);
 	ah = (struct aunhdr *)data;
 	len = skb->len - sizeof(struct udphdr);
-	ip = skb->nh.iph;
+	ip = ip_hdr(skb);
 
 	switch (ah->code)
 	{