diff options
| author | David S. Miller <davem@davemloft.net> | 2008-04-08 16:50:44 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-08 16:50:44 -0700 |
| commit | 21f644f3eabde637f255f75ad05d0821a7a36b7f (patch) | |
| tree | 2dc70aade59bf77c2d156b8e2544906128368f87 /drivers/net/virtio_net.c | |
| parent | 6adb4f733e9996b4fd68a6db50dd51bd2463ccac (diff) | |
| download | linux-21f644f3eabde637f255f75ad05d0821a7a36b7f.tar.bz2 | |
[NET]: Undo code bloat in hot paths due to print_mac().
If print_mac() is used inside of a pr_debug() the compiler
can't see that the call is redundant so still performs it
even of pr_debug() ends up being a nop.
So don't use print_mac() in such cases in hot code paths,
use MAC_FMT et al. instead.
As noted by Joe Perches, pr_debug() could be modified to
handle this better, but that is a change to an interface
used by the entire kernel and thus needs to be validated
carefully. This here is thus the less risky fix for
2.6.25
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/virtio_net.c')
| -rw-r--r-- | drivers/net/virtio_net.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index b58472cf76f8..d02d9d75fe14 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -234,11 +234,12 @@ static int start_xmit(struct sk_buff *skb, struct net_device *dev) struct scatterlist sg[1+MAX_SKB_FRAGS]; struct virtio_net_hdr *hdr; const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest; - DECLARE_MAC_BUF(mac); sg_init_table(sg, 1+MAX_SKB_FRAGS); - pr_debug("%s: xmit %p %s\n", dev->name, skb, print_mac(mac, dest)); + pr_debug("%s: xmit %p " MAC_FMT "\n", dev->name, skb, + dest[0], dest[1], dest[2], + dest[3], dest[4], dest[5]); /* Encode metadata header at front. */ hdr = skb_vnet_hdr(skb); |