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)