extern void addrconf_init(void);
extern void addrconf_cleanup(void);
-extern int addrconf_add_ifaddr(void *arg);
-extern int addrconf_del_ifaddr(void *arg);
-extern int addrconf_set_dstaddr(void *arg);
+extern int addrconf_add_ifaddr(void __user *arg);
+extern int addrconf_del_ifaddr(void __user *arg);
+extern int addrconf_set_dstaddr(void __user *arg);
extern int ipv6_chk_addr(struct in6_addr *addr,
struct net_device *dev,