[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/net/atm/lec.c b/net/atm/lec.c
index a2efa7f..3235c57 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -266,7 +266,6 @@
char buf[300];
int i = 0;
#endif /* DUMP_PACKETS >0 */
- DECLARE_MAC_BUF(mac);
pr_debug("lec_start_xmit called\n");
if (!priv->lecd) {
@@ -374,15 +373,19 @@
if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
pr_debug("%s:lec_start_xmit: queuing packet, ",
dev->name);
- pr_debug("MAC address %s\n",
- print_mac(mac, lec_h->h_dest));
+ pr_debug("MAC address " MAC_FMT "\n",
+ lec_h->h_dest[0], lec_h->h_dest[1],
+ lec_h->h_dest[2], lec_h->h_dest[3],
+ lec_h->h_dest[4], lec_h->h_dest[5]);
skb_queue_tail(&entry->tx_wait, skb);
} else {
pr_debug
("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
dev->name);
- pr_debug("MAC address %s\n",
- print_mac(mac, lec_h->h_dest));
+ pr_debug("MAC address " MAC_FMT "\n",
+ lec_h->h_dest[0], lec_h->h_dest[1],
+ lec_h->h_dest[2], lec_h->h_dest[3],
+ lec_h->h_dest[4], lec_h->h_dest[5]);
priv->stats.tx_dropped++;
dev_kfree_skb(skb);
}
@@ -394,8 +397,10 @@
while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
pr_debug("lec.c: emptying tx queue, ");
- pr_debug("MAC address %s\n",
- print_mac(mac, lec_h->h_dest));
+ pr_debug("MAC address " MAC_FMT "\n",
+ lec_h->h_dest[0], lec_h->h_dest[1],
+ lec_h->h_dest[2], lec_h->h_dest[3],
+ lec_h->h_dest[4], lec_h->h_dest[5]);
lec_send(vcc, skb2, priv);
}
@@ -449,7 +454,6 @@
struct lec_arp_table *entry;
int i;
char *tmp; /* FIXME */
- DECLARE_MAC_BUF(mac);
atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
mesg = (struct atmlec_msg *)skb->data;
@@ -536,9 +540,14 @@
struct net_bridge_fdb_entry *f;
pr_debug
- ("%s: bridge zeppelin asks about %s\n",
+ ("%s: bridge zeppelin asks about " MAC_FMT "\n",
dev->name,
- print_mac(mac, mesg->content.proxy.mac_addr));
+ mesg->content.proxy.mac_addr[0],
+ mesg->content.proxy.mac_addr[1],
+ mesg->content.proxy.mac_addr[2],
+ mesg->content.proxy.mac_addr[3],
+ mesg->content.proxy.mac_addr[4],
+ mesg->content.proxy.mac_addr[5]);
if (br_fdb_get_hook == NULL || dev->br_port == NULL)
break;
