tree e2bd88b85cecb6f616a16a5926342dd35c059a97
parent 29a3cad5c6ae9e7fbf1509d01d39c3c3c38f11f9
author Simon Horman <horms@verge.net.au> 1369773267 +0000
committer David S. Miller <davem@davemloft.net> 1369810147 -0700

ipv4: Correct comparisons and calculations using skb->tail and skb-transport_header

This corrects an regression introduced by "net: Use 16bits for *_headers
fields of struct skbuff" when NET_SKBUFF_DATA_USES_OFFSET is not set. In
that case skb->tail will be a pointer whereas skb->transport_header
will be an offset from head. This is corrected by using wrappers that
ensure that comparisons and calculations are always made using pointers.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>