net: Correct comparisons and calculations using skb->tail and skb-transport_header
authorSimon Horman <horms@verge.net.au>
Tue, 28 May 2013 20:34:25 +0000 (20:34 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 29 May 2013 06:49:07 +0000 (23:49 -0700)
commitced14f6804a979d1972415bc23f2f8ddb18595dd
tree4a1acce32c9d4dd88afaba37841461bb36be9c4d
parentbe8b678c6c63010cd2b0f4f602bd3066f7827fb2
net: 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>
include/net/inet_ecn.h
net/core/dev.c