extern unsigned inet_addr_type(u32 addr);
extern void ip_rt_multicast_event(struct in_device *);
-extern int ip_rt_ioctl(unsigned int cmd, void *arg);
+extern int ip_rt_ioctl(unsigned int cmd, void __user *arg);
extern void ip_rt_get_source(u8 *src, struct rtable *rt);
extern int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb);