[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, 24 insertions, 15 deletions

diff --git a/drivers/net/wireless/hostap/hostap_80211_rx.c b/drivers/net/wireless/hostap/hostap_80211_rx.c
index 49978bdb4324..4fd73809602e 100644
--- a/drivers/net/wireless/hostap/hostap_80211_rx.c
+++ b/drivers/net/wireless/hostap/hostap_80211_rx.c
@@ -635,7 +635,6 @@ hostap_rx_frame_decrypt(local_info_t *local, struct sk_buff *skb,
 {
         struct ieee80211_hdr_4addr *hdr;
         int res, hdrlen;
-        DECLARE_MAC_BUF(mac);
 
         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
                 return 0;
@@ -647,8 +646,10 @@ hostap_rx_frame_decrypt(local_info_t *local, struct sk_buff *skb,
             strcmp(crypt->ops->name, "TKIP") == 0) {
                 if (net_ratelimit()) {
                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
-                               "received packet from %s\n",
-                               local->dev->name, print_mac(mac, hdr->addr2));
+                               "received packet from " MAC_FMT "\n",
+                               local->dev->name,
+                               hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
+                               hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
                 }
                 return -1;
         }
@@ -657,9 +658,12 @@ hostap_rx_frame_decrypt(local_info_t *local, struct sk_buff *skb,
         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
         atomic_dec(&crypt->refcnt);
         if (res < 0) {
-                printk(KERN_DEBUG "%s: decryption failed (SA=%s"
+                printk(KERN_DEBUG "%s: decryption failed (SA=" MAC_FMT
                        ") res=%d\n",
-                       local->dev->name, print_mac(mac, hdr->addr2), res);
+                       local->dev->name,
+                       hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
+                       hdr->addr2[3], hdr->addr2[4], hdr->addr2[5],
+                       res);
                 local->comm_tallies.rx_discards_wep_undecryptable++;
                 return -1;
         }
@@ -721,7 +725,6 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
         struct ieee80211_crypt_data *crypt = NULL;
         void *sta = NULL;
         int keyidx = 0;
-        DECLARE_MAC_BUF(mac);
 
         iface = netdev_priv(dev);
         local = iface->local;
@@ -798,8 +801,10 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
                          * frames silently instead of filling system log with
                          * these reports. */
                         printk(KERN_DEBUG "%s: WEP decryption failed (not set)"
-                               " (SA=%s)\n",
-                               local->dev->name, print_mac(mac, hdr->addr2));
+                               " (SA=" MAC_FMT ")\n",
+                               local->dev->name,
+                               hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
+                               hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
 #endif
                         local->comm_tallies.rx_discards_wep_undecryptable++;
                         goto rx_dropped;
@@ -813,8 +818,9 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
                     (keyidx = hostap_rx_frame_decrypt(local, skb, crypt)) < 0)
                 {
                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
-                               "from %s\n", dev->name,
-                               print_mac(mac, hdr->addr2));
+                               "from " MAC_FMT "\n", dev->name,
+                               hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
+                               hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
                         /* TODO: could inform hostapd about this so that it
                          * could send auth failure report */
                         goto rx_dropped;
@@ -982,8 +988,10 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
                                "unencrypted EAPOL frame\n", local->dev->name);
                 } else {
                         printk(KERN_DEBUG "%s: encryption configured, but RX "
-                               "frame not encrypted (SA=%s)\n",
-                               local->dev->name, print_mac(mac, hdr->addr2));
+                               "frame not encrypted (SA=" MAC_FMT ")\n",
+                               local->dev->name,
+                               hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
+                               hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
                         goto rx_dropped;
                 }
         }
@@ -992,9 +1000,10 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
             !hostap_is_eapol_frame(local, skb)) {
                 if (net_ratelimit()) {
                         printk(KERN_DEBUG "%s: dropped unencrypted RX data "
-                               "frame from %s"
-                               " (drop_unencrypted=1)\n",
-                               dev->name, print_mac(mac, hdr->addr2));
+                               "frame from " MAC_FMT " (drop_unencrypted=1)\n",
+                               dev->name,
+                               hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
+                               hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
                 }
                 goto rx_dropped;
         }