[SK_BUFF]: Introduce skb_reset_mac_header(skb)

For the common, open coded 'skb->mac.raw = skb->data' operation, so that we can
later turn skb->mac.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, 1 insertions, 1 deletions

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 5db301b33372..ddba857bd243 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -95,7 +95,7 @@ __inline__ void ip_send_check(struct iphdr *iph)
 /* dev_loopback_xmit for use with netfilter. */
 static int ip_dev_loopback_xmit(struct sk_buff *newskb)
 {
-        newskb->mac.raw = newskb->data;
+        skb_reset_mac_header(newskb);
         __skb_pull(newskb, newskb->nh.raw - newskb->data);
         newskb->pkt_type = PACKET_LOOPBACK;
         newskb->ip_summed = CHECKSUM_UNNECESSARY;