--- /dev/null
+Index: linux-2.6.21.7/include/linux/netdevice.h
+===================================================================
+--- linux-2.6.21.7.orig/include/linux/netdevice.h
++++ linux-2.6.21.7/include/linux/netdevice.h
+@@ -532,6 +532,8 @@ struct net_device
+ struct device dev;
+ /* space for optional statistics and wireless sysfs groups */
+ struct attribute_group *sysfs_groups[3];
++
++ void *ieee80211_ptr;
+ };
+ #define to_net_dev(d) container_of(d, struct net_device, dev)
+