From: Tom Herbert <therbert@google.com>
Date: Wed, 2 Jul 2014 04:33:17 +0000 (-0700)
Subject: net: Only do flow_dissector hash computation once per packet
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~149^2~223^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3b18ddb9cc1056eea24e3edc1828cfb3fd0726f;p=pandora-kernel.git

net: Only do flow_dissector hash computation once per packet

Add sw_hash flag to skbuff to indicate that skb->hash was computed
from flow_dissector. This flag is checked in skb_get_hash to avoid
repeatedly trying to compute the hash (ie. in the case that no L4 hash
can be computed).

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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