int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *,
unsigned char *, int);
-int compat_mc_setsockopt(struct sock *, int, int, char __user *, unsigned int,
- int (*)(struct sock *, int, int, char __user *,
- unsigned int));
-
struct compat_group_req {
__u32 gr_interface;
struct __kernel_sockaddr_storage gr_group