From: David S. Miller Date: Tue, 5 May 2015 23:24:43 +0000 (-0400) Subject: Merge branch 'eth_proto_is_802_3' X-Git-Tag: v4.14-rc1~5205^2~371 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=76061d99a3ba6c29c3dfc24bda2ec0550838951f;p=platform%2Fkernel%2Flinux-rpi.git Merge branch 'eth_proto_is_802_3' Alexander Duyck says: ==================== Add eth_proto_is_802_3 to provide improved means of checking Ethertype This patch series implements and makes use of eth_proto_is_802_3(). The idea behind the function is to provide an optimized means of testing to determine if a given Ethertype value is a length or 802.3 protocol number. The standard path for this was to use ntohs(proto) and then perform a comparison. This adds a slight cost as it usually requires either a 16b rotate or byte swap which can cost 1 cycle or more depending on the processor. I had previously addressed this for eth_type_trans, however in doing so I had overlooked checking with sparse and had introduced a couple sparse warnings. The first patch in this series fixes those sparse warnings as well as does some additional optimization for big endian systems. In addition it pushes the code out into a separate function which can then be used in the other patches to reduce the instruction count/processing time in those functions as well. ==================== Signed-off-by: David S. Miller --- 76061d99a3ba6c29c3dfc24bda2ec0550838951f