-extern int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len);
-extern int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len);
-extern int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb);
-extern void udpv6_destroy_sock(struct sock *sk);
+int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+ size_t len);
+int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+ size_t len, int noblock, int flags, int *addr_len);
+int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
+void udpv6_destroy_sock(struct sock *sk);