net/ipv4/udp.c: proto sendpage returns int not size_t.

net/ipv4/udp.c

@@ -739,7 +739,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	goto out;
 }
 
-ssize_t udp_sendpage(struct sock *sk, struct page *page, int offset, size_t size, int flags)
+int udp_sendpage(struct sock *sk, struct page *page, int offset, size_t size, int flags)
 {
 	struct udp_opt *up = udp_sk(sk);
 	int ret;