[SK_BUFF]: Introduce skb_transport_header(skb)

For the places where we need a pointer to the transport header, it is
still legal to touch skb->h.raw directly if just adding to,
subtracting from or setting it to another layer header.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/net/ipv4/xfrm4_mode_transport.c b/net/ipv4/xfrm4_mode_transport.c
index 2c46cbb3bbb5..dc8834ea3754 100644
--- a/net/ipv4/xfrm4_mode_transport.c
+++ b/net/ipv4/xfrm4_mode_transport.c
@@ -45,10 +45,11 @@ static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
  */
 static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-        int ihl = skb->data - skb->h.raw;
+        int ihl = skb->data - skb_transport_header(skb);
 
         if (skb->h.raw != skb->nh.raw) {
-                memmove(skb->h.raw, skb_network_header(skb), ihl);
+                memmove(skb_transport_header(skb),
+                        skb_network_header(skb), ihl);
                 skb->nh.raw = skb->h.raw;
         }
         ip_hdr(skb)->tot_len = htons(skb->len + ihl);