mac80211: use 16 bit alignment for the if_ibss bssid field

Several MAC address comparison functions assume 16 bit alignment for pointers
passed to them. Since the addition of the control_port field, alignment
for the IBSS bssid was off by one, causing a severe performance hit on
architectures without efficient unaligned access (e.g. MIPS).

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index cee0c7493fd0003d5cbc8f193afdea81e2d769e9..c4130588b035f95b89ed5e245edf052276ce6f34 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -480,7 +480,7 @@ struct ieee80211_if_ibss {
 
        bool control_port;
 
-       u8 bssid[ETH_ALEN];
+       u8 bssid[ETH_ALEN] __aligned(2);
        u8 ssid[IEEE80211_MAX_SSID_LEN];
        u8 ssid_len, ie_len;
        u8 *ie;