From: Eric Dumazet <redacted>
Date: Wed, 30 Jan 2013 17:51:44 -0800

From: Eric Dumazet <edumazet@google.com>

Supporting access to skb->pkt_type is a bit tricky if we want
to have a generic code, allowing pkt_type to be moved in struct sk_buff

pkt_type is a bit field, so compiler cannot really help us to find
its offset. Let's use a helper for this : It will throw a one time
message if pkt_type no longer starts at a byte boundary or is
no longer a 3bit field.

Reported-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied, although that's quite a hoop to jump through to accomplish
this.