[SK_BUFF]: Introduce skb_reset_network_header(skb)

For the common, open coded 'skb->nh.raw = skb->data' operation, so that we can
later turn skb->nh.raw into a offset, reducing the size of struct sk_buff in
64bit land while possibly keeping it as a pointer on 32bit.

This one touches just the most simple case, next will handle the slightly more
"complex" cases.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index d8c84d8d7cf8..30df8e6c42cc 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -525,7 +525,7 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
         dst_release(skb2->dst);
         skb2->dst = NULL;
         skb_pull(skb2, offset);
-        skb2->nh.raw = skb2->data;
+        skb_reset_network_header(skb2);
         eiph = skb2->nh.iph;
 
         /* Try to guess incoming interface */
@@ -599,7 +599,7 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                 dst_release(skb2->dst);
                 skb2->dst = NULL;
                 skb_pull(skb2, offset);
-                skb2->nh.raw = skb2->data;
+                skb_reset_network_header(skb2);
 
                 /* Try to guess incoming interface */
                 rt = rt6_lookup(&skb2->nh.ipv6h->saddr, NULL, 0, 0);
@@ -704,7 +704,7 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
                 }
                 secpath_reset(skb);
                 skb->mac.raw = skb->nh.raw;
-                skb->nh.raw = skb->data;
+                skb_reset_network_header(skb);
                 skb->protocol = htons(protocol);
                 skb->pkt_type = PACKET_HOST;
                 memset(skb->cb, 0, sizeof(struct inet6_skb_parm));