From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 27 Aug 2010 05:03:08 +0000 (-0700)
Subject: gro: __napi_gro_receive() optimizations
X-Git-Tag: v2.6.37-rc1~147^2~647
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40d0802b3eb47d57e2d57a5244a18cbbe9632e13;p=pandora-kernel.git

gro: __napi_gro_receive() optimizations

compare_ether_header() can have a special implementation on 64 bit
arches if CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is defined.

__napi_gro_receive() and vlan_gro_common() can avoid a conditional
branch to perform device match.

On x86_64, __napi_gro_receive() has now 38 instructions instead of 53

As gcc-4.4.3 still choose to not inline it, add inline keyword to this
performance critical function.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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