[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>
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index b58472c..d02d9d7 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -234,11 +234,12 @@
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);