int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *,
struct sockaddr __user **, struct iovec **);
struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval);
-asmlinkage long compat_sys_sendmsg(int, struct compat_msghdr __user *,
- unsigned int);
-asmlinkage long compat_sys_sendmmsg(int, struct compat_mmsghdr __user *,
- unsigned int, unsigned int);
-asmlinkage long compat_sys_recvmsg(int, struct compat_msghdr __user *,
- unsigned int);
-asmlinkage long compat_sys_recvmmsg(int, struct compat_mmsghdr __user *,
- unsigned int, unsigned int,
- struct compat_timespec __user *);
-asmlinkage long compat_sys_getsockopt(int, int, int, char __user *,
- int __user *);
int put_cmsg_compat(struct msghdr*, int, int, int, void *);
int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *,