From: Eric Dumazet <edumazet@google.com>
Date: Thu, 31 Jan 2013 01:51:44 +0000 (-0800)
Subject: x86: bpf_jit_comp: add pkt_type support
X-Git-Tag: v3.9-rc1~139^2~204
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3b58908a92e00840bcd9050808f3dc86fd547029;p=pandora-kernel.git

x86: bpf_jit_comp: add pkt_type support

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>
Cc: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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