(gdb) list *(ieee80211_hw_config+0x20/0x9c)
0x0 is in ieee80211_init (/scratch/openwrt/trunk/build_dir/linux-ar7/mac80211/mac80211/ieee80211.c:1240).
1235            return 0;
1236    }
1237
1238    static void __exit ieee80211_exit(void)
1239    {
1240            ieee80211_wme_unregister();
1241            ieee80211_debugfs_netdev_exit();
1242    }
1243
1244