[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>

1 files changed, 19 insertions, 10 deletions

diff --git a/net/atm/lec.c b/net/atm/lec.c
index a2efa7ff41f1..3235c57615e4 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -266,7 +266,6 @@ static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
         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 @@ static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
                 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 @@ static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
         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 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
         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 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
                         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;