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| author | Alexander Duyck <alexander.h.duyck@redhat.com> | 2015-04-30 14:53:59 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-03 22:30:36 -0400 |
| commit | 610986e7262624e2dd29ad8dea05b4e1ac3f07fb (patch) | |
| tree | 3f5fe450644b92d062c9e6f52a56e9e50bcec8f5 /net/ethernet | |
| parent | d54385ce68cd18ab002b46f61246ad197cec92de (diff) | |
| download | linux-610986e7262624e2dd29ad8dea05b4e1ac3f07fb.tar.gz linux-610986e7262624e2dd29ad8dea05b4e1ac3f07fb.tar.bz2 linux-610986e7262624e2dd29ad8dea05b4e1ac3f07fb.zip | |
etherdev: Use skb->data to retrieve Ethernet header instead of eth_hdr
Avoid recomputing the Ethernet header location and instead just use the
pointer provided by skb->data. The problem with using eth_hdr is that the
compiler wasn't smart enough to realize that skb->head + skb->mac_header
was the same thing as skb->data before it added ETH_HLEN. By just caching
it off before calling skb_pull_inline we can avoid a few unnecessary
instructions.
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethernet')
| -rw-r--r-- | net/ethernet/eth.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index 21c211e9fd5a..314e4c5a5a5e 100644 --- a/net/ethernet/eth.c +++ b/net/ethernet/eth.c @@ -156,8 +156,9 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev) skb->dev = dev; skb_reset_mac_header(skb); + + eth = (struct ethhdr *)skb->data; skb_pull_inline(skb, ETH_HLEN); - eth = eth_hdr(skb); if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) { if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |