extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
-extern int ipmr_ioctl(struct sock *sk, int cmd, unsigned long arg);
+extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
extern void ip_mr_init(void);