From: Eric Dumazet <edumazet@google.com>
Date: Thu, 7 Nov 2013 16:37:28 +0000 (-0800)
Subject: net: flow_dissector: small optimizations in IPv4 dissect
X-Git-Tag: v3.13-rc1~105^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3797d3e8462efdaadb64164ca540626b55fe8336;p=pandora-kernel.git

net: flow_dissector: small optimizations in IPv4 dissect

By moving code around, we avoid :

1) A reload of iph->ihl (bit field, so needs a mask)

2) A conditional test (replaced by a conditional mov on x86)
   Fast path loads iph->protocol anyway.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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