Linux-2.6.33.2/drivers/staging/wlags49_h2/wl_sysfs.h

#ifdef CONFIG_SYSFS
extern void register_wlags_sysfs(struct net_device *);
extern void unregister_wlags_sysfs(struct net_device *);
#else
static void register_wlags_sysfs(struct net_device *) { return; };
static void unregister_wlags_sysfs(struct net_device *) { return; };
#endif