mac80211: dont use interface indices in drivers

This patch gets rid of the if_id stuff where possible in favour of
a new per-virtual-interface structure "struct ieee80211_vif". This
structure is located at the end of the per-interface structure and
contains a variable length driver-use data area.

This has two advantages:
 * removes the need to look up interfaces by if_id, this is better
   for working with network namespaces and performance
 * allows drivers to store and retrieve per-interface data without
   having to allocate own lists/hash tables

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index 5a1a790a105b..82bff51d5595 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -625,10 +625,7 @@ struct b43_wl {
          * at a time. General information about this interface follows.
          */
 
-        /* Opaque ID of the operating interface from the ieee80211
-         * subsystem. Do not modify.
-         */
-        int if_id;
+        struct ieee80211_vif *vif;
         /* The MAC address of the operating interface. */
         u8 mac_addr[ETH_ALEN];
         /* Current BSSID */