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authorDavid S. Miller <davem@davemloft.net>2008-04-09 03:50:44 +0400
committerDavid S. Miller <davem@davemloft.net>2008-04-09 03:50:44 +0400
commit21f644f3eabde637f255f75ad05d0821a7a36b7f (patch)
tree2dc70aade59bf77c2d156b8e2544906128368f87 /net/ieee80211
parent6adb4f733e9996b4fd68a6db50dd51bd2463ccac (diff)
downloadlinux-21f644f3eabde637f255f75ad05d0821a7a36b7f.tar.xz
[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 'net/ieee80211')
-rw-r--r--net/ieee80211/ieee80211_rx.c43
1 files changed, 29 insertions, 14 deletions
diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index 1e3f87c8c012..200ee1e63728 100644
--- a/net/ieee80211/ieee80211_rx.c
+++ b/net/ieee80211/ieee80211_rx.c
@@ -271,7 +271,6 @@ ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
{
struct ieee80211_hdr_3addr *hdr;
int res, hdrlen;
- DECLARE_MAC_BUF(mac);
if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
return 0;
@@ -283,8 +282,12 @@ ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
atomic_dec(&crypt->refcnt);
if (res < 0) {
- IEEE80211_DEBUG_DROP("decryption failed (SA=%s"
- ") res=%d\n", print_mac(mac, hdr->addr2), res);
+ IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
+ ") res=%d\n",
+ hdr->addr2[0], hdr->addr2[1],
+ hdr->addr2[2], hdr->addr2[3],
+ hdr->addr2[4], hdr->addr2[5],
+ res);
if (res == -2)
IEEE80211_DEBUG_DROP("Decryption failed ICV "
"mismatch (key %d)\n",
@@ -304,7 +307,6 @@ ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
{
struct ieee80211_hdr_3addr *hdr;
int res, hdrlen;
- DECLARE_MAC_BUF(mac);
if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
return 0;
@@ -317,8 +319,12 @@ ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
atomic_dec(&crypt->refcnt);
if (res < 0) {
printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
- " (SA=%s keyidx=%d)\n",
- ieee->dev->name, print_mac(mac, hdr->addr2), keyidx);
+ " (SA=" MAC_FMT " keyidx=%d)\n",
+ ieee->dev->name,
+ hdr->addr2[0], hdr->addr2[1],
+ hdr->addr2[2], hdr->addr2[3],
+ hdr->addr2[4], hdr->addr2[5],
+ keyidx);
return -1;
}
@@ -462,8 +468,10 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
* frames silently instead of filling system log with
* these reports. */
IEEE80211_DEBUG_DROP("Decryption failed (not set)"
- " (SA=%s)\n",
- print_mac(mac, hdr->addr2));
+ " (SA=" MAC_FMT ")\n",
+ hdr->addr2[0], hdr->addr2[1],
+ hdr->addr2[2], hdr->addr2[3],
+ hdr->addr2[4], hdr->addr2[5]);
ieee->ieee_stats.rx_discards_undecryptable++;
goto rx_dropped;
}
@@ -474,8 +482,10 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
(keyidx = hostap_rx_frame_decrypt(ieee, 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;
@@ -653,8 +663,11 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
* configured */
} else {
IEEE80211_DEBUG_DROP("encryption configured, but RX "
- "frame not encrypted (SA=%s"
- ")\n", print_mac(mac, hdr->addr2));
+ "frame not encrypted (SA="
+ MAC_FMT ")\n",
+ hdr->addr2[0], hdr->addr2[1],
+ hdr->addr2[2], hdr->addr2[3],
+ hdr->addr2[4], hdr->addr2[5]);
goto rx_dropped;
}
}
@@ -662,9 +675,11 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
!ieee80211_is_eapol_frame(ieee, skb)) {
IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
- "frame from %s"
+ "frame from " MAC_FMT
" (drop_unencrypted=1)\n",
- print_mac(mac, hdr->addr2));
+ hdr->addr2[0], hdr->addr2[1],
+ hdr->addr2[2], hdr->addr2[3],
+ hdr->addr2[4], hdr->addr2[5]);
goto rx_dropped;
}