--- zzzz-none-000/linux-3.10.107/net/dccp/proto.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/net/dccp/proto.c	2021-02-04 17:41:59.000000000 +0000
@@ -336,18 +336,17 @@
 			mask |= POLLIN | POLLRDNORM;
 
 		if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
-			if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) {
+			if (sk_stream_is_writeable(sk)) {
 				mask |= POLLOUT | POLLWRNORM;
 			} else {  /* send SIGIO later */
-				set_bit(SOCK_ASYNC_NOSPACE,
-					&sk->sk_socket->flags);
+				sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
 				set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
 
 				/* Race breaker. If space is freed after
 				 * wspace test but before the flags are set,
 				 * IO signal will be lost.
 				 */
-				if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
+				if (sk_stream_is_writeable(sk))
 					mask |= POLLOUT | POLLWRNORM;
 			}
 		}
@@ -703,7 +702,7 @@
 
 static int dccp_msghdr_parse(struct msghdr *msg, struct sk_buff *skb)
 {
-	struct cmsghdr *cmsg = CMSG_FIRSTHDR(msg);
+	struct cmsghdr *cmsg;
 
 	/*
 	 * Assign an (opaque) qpolicy priority value to skb->priority.
@@ -717,8 +716,7 @@
 	 */
 	skb->priority = 0;
 
-	for (; cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) {
-
+	for_each_cmsghdr(cmsg, msg) {
 		if (!CMSG_OK(msg, cmsg))
 			return -EINVAL;
 
@@ -742,8 +740,7 @@
 	return 0;
 }
 
-int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		 size_t len)
+int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 {
 	const struct dccp_sock *dp = dccp_sk(sk);
 	const int flags = msg->msg_flags;
@@ -781,7 +778,7 @@
 		goto out_release;
 
 	skb_reserve(skb, sk->sk_prot->max_header);
-	rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+	rc = memcpy_from_msg(skb_put(skb, len), msg, len);
 	if (rc != 0)
 		goto out_discard;
 
@@ -807,8 +804,8 @@
 
 EXPORT_SYMBOL_GPL(dccp_sendmsg);
 
-int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		 size_t len, int nonblock, int flags, int *addr_len)
+int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
+		 int flags, int *addr_len)
 {
 	const struct dccp_hdr *dh;
 	long timeo;
@@ -848,7 +845,7 @@
 		default:
 			dccp_pr_debug("packet_type=%s\n",
 				      dccp_packet_name(dh->dccph_type));
-			sk_eat_skb(sk, skb, false);
+			sk_eat_skb(sk, skb);
 		}
 verify_sock_status:
 		if (sock_flag(sk, SOCK_DONE)) {
@@ -888,7 +885,7 @@
 			break;
 		}
 
-		sk_wait_data(sk, &timeo);
+		sk_wait_data(sk, &timeo, NULL);
 		continue;
 	found_ok_skb:
 		if (len > skb->len)
@@ -896,7 +893,7 @@
 		else if (len < skb->len)
 			msg->msg_flags |= MSG_TRUNC;
 
-		if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) {
+		if (skb_copy_datagram_msg(skb, 0, msg, len)) {
 			/* Exception. Bailout! */
 			len = -EFAULT;
 			break;
@@ -905,7 +902,7 @@
 			len = skb->len;
 	found_fin_ok:
 		if (!(flags & MSG_PEEK))
-			sk_eat_skb(sk, skb, false);
+			sk_eat_skb(sk, skb);
 		break;
 	} while (1);
 out:
@@ -1086,16 +1083,17 @@
 
 EXPORT_SYMBOL_GPL(dccp_shutdown);
 
-static inline int dccp_mib_init(void)
+static inline int __init dccp_mib_init(void)
 {
-	return snmp_mib_init((void __percpu **)dccp_statistics,
-			     sizeof(struct dccp_mib),
-			     __alignof__(struct dccp_mib));
+	dccp_statistics = alloc_percpu(struct dccp_mib);
+	if (!dccp_statistics)
+		return -ENOMEM;
+	return 0;
 }
 
 static inline void dccp_mib_exit(void)
 {
-	snmp_mib_free((void __percpu **)dccp_statistics);
+	free_percpu(dccp_statistics);
 }
 
 static int thash_entries;
@@ -1118,7 +1116,7 @@
 
 	BUILD_BUG_ON(sizeof(struct dccp_skb_cb) >
 		     FIELD_SIZEOF(struct sk_buff, cb));
-	rc = percpu_counter_init(&dccp_orphan_count, 0);
+	rc = percpu_counter_init(&dccp_orphan_count, 0, GFP_KERNEL);
 	if (rc)
 		goto out_fail;
 	rc = -ENOBUFS;
@@ -1162,10 +1160,8 @@
 		goto out_free_bind_bucket_cachep;
 	}
 
-	for (i = 0; i <= dccp_hashinfo.ehash_mask; i++) {
+	for (i = 0; i <= dccp_hashinfo.ehash_mask; i++)
 		INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].chain, i);
-		INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].twchain, i);
-	}
 
 	if (inet_ehash_locks_alloc(&dccp_hashinfo))
 			goto out_free_dccp_ehash;