[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, 7 insertions, 5 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index f832f3c33ab1..2b214cc3724c 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2219,8 +2219,9 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
                 th->check = ~csum_fold((__force __wsum)((__force u32)th->check +
                                        (__force u32)delta));
                 if (skb->ip_summed != CHECKSUM_PARTIAL)
-                        th->check = csum_fold(csum_partial(skb->h.raw, thlen,
-                                                           skb->csum));
+                        th->check =
+                             csum_fold(csum_partial(skb_transport_header(skb),
+                                                    thlen, skb->csum));
 
                 seq += len;
                 skb = skb->next;
@@ -2230,12 +2231,13 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
                 th->cwr = 0;
         } while (skb->next);
 
-        delta = htonl(oldlen + (skb->tail - skb->h.raw) + skb->data_len);
+        delta = htonl(oldlen + (skb->tail - skb_transport_header(skb)) +
+                      skb->data_len);
         th->check = ~csum_fold((__force __wsum)((__force u32)th->check +
                                 (__force u32)delta));
         if (skb->ip_summed != CHECKSUM_PARTIAL)
-                th->check = csum_fold(csum_partial(skb->h.raw, thlen,
-                                                   skb->csum));
+                th->check = csum_fold(csum_partial(skb_transport_header(skb),
+                                                   thlen, skb->csum));
 
 out:
         return segs;