Merge git://1984.lsi.us.es/nf-next

Pablo Neira Ayuso says:

====================
This is the first batch of Netfilter and IPVS updates for your
net-next tree. Mostly cleanups for the Netfilter side. They are:

* Remove unnecessary RTNL locking now that we have support
  for namespace in nf_conntrack, from Patrick McHardy.

* Cleanup to eliminate unnecessary goto in the initialization
  path of several Netfilter tables, from Jean Sacren.

* Another cleanup from Wu Fengguang, this time to PTR_RET instead
  of if IS_ERR then return PTR_ERR.

* Use list_for_each_entry_continue_rcu in nf_iterate, from
  Michael Wang.

* Add pmtu_disc sysctl option to disable PMTU in their tunneling
  transmitter, from Julian Anastasov.

* Generalize application protocol registration in IPVS and modify
  IPVS FTP helper to use it, from Julian Anastasov.

* update Kconfig. The IPVS FTP helper depends on the Netfilter FTP
  helper for NAT support, from Julian Anastasov.

* Add logic to update PMTU for IPIP packets in IPVS, again
  from Julian Anastasov.

* A couple of sparse warning fixes for IPVS and Netfilter from
  Claudiu Ghioc and Patrick McHardy respectively.

Patrick's IPv6 NAT changes will follow after this batch, I need
to flush this batch first before refreshing my tree.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/netfilter/iptable_filter.c

@@ -69,9 +69,7 @@ static int __net_init iptable_filter_net_init(struct net *net)
 	net->ipv4.iptable_filter =
 		ipt_register_table(net, &packet_filter, repl);
 	kfree(repl);
-	if (IS_ERR(net->ipv4.iptable_filter))
-		return PTR_ERR(net->ipv4.iptable_filter);
-	return 0;
+	return PTR_RET(net->ipv4.iptable_filter);
 }
 
 static void __net_exit iptable_filter_net_exit(struct net *net)
@@ -96,14 +94,10 @@ static int __init iptable_filter_init(void)
 	filter_ops = xt_hook_link(&packet_filter, iptable_filter_hook);
 	if (IS_ERR(filter_ops)) {
 		ret = PTR_ERR(filter_ops);
-		goto cleanup_table;
+		unregister_pernet_subsys(&iptable_filter_net_ops);
 	}
 
 	return ret;
-
- cleanup_table:
-	unregister_pernet_subsys(&iptable_filter_net_ops);
-	return ret;
 }
 
 static void __exit iptable_filter_fini(void)

net/ipv4/netfilter/iptable_mangle.c

@@ -104,9 +104,7 @@ static int __net_init iptable_mangle_net_init(struct net *net)
 	net->ipv4.iptable_mangle =
 		ipt_register_table(net, &packet_mangler, repl);
 	kfree(repl);
-	if (IS_ERR(net->ipv4.iptable_mangle))
-		return PTR_ERR(net->ipv4.iptable_mangle);
-	return 0;
+	return PTR_RET(net->ipv4.iptable_mangle);
 }
 
 static void __net_exit iptable_mangle_net_exit(struct net *net)
@@ -131,14 +129,10 @@ static int __init iptable_mangle_init(void)
 	mangle_ops = xt_hook_link(&packet_mangler, iptable_mangle_hook);
 	if (IS_ERR(mangle_ops)) {
 		ret = PTR_ERR(mangle_ops);
-		goto cleanup_table;
+		unregister_pernet_subsys(&iptable_mangle_net_ops);
 	}
 
 	return ret;
-
- cleanup_table:
-	unregister_pernet_subsys(&iptable_mangle_net_ops);
-	return ret;
 }
 
 static void __exit iptable_mangle_fini(void)

net/ipv4/netfilter/iptable_raw.c

@@ -48,9 +48,7 @@ static int __net_init iptable_raw_net_init(struct net *net)
 	net->ipv4.iptable_raw =
 		ipt_register_table(net, &packet_raw, repl);
 	kfree(repl);
-	if (IS_ERR(net->ipv4.iptable_raw))
-		return PTR_ERR(net->ipv4.iptable_raw);
-	return 0;
+	return PTR_RET(net->ipv4.iptable_raw);
 }
 
 static void __net_exit iptable_raw_net_exit(struct net *net)
@@ -75,14 +73,10 @@ static int __init iptable_raw_init(void)
 	rawtable_ops = xt_hook_link(&packet_raw, iptable_raw_hook);
 	if (IS_ERR(rawtable_ops)) {
 		ret = PTR_ERR(rawtable_ops);
-		goto cleanup_table;
+		unregister_pernet_subsys(&iptable_raw_net_ops);
 	}
 
 	return ret;
-
- cleanup_table:
-	unregister_pernet_subsys(&iptable_raw_net_ops);
-	return ret;
 }
 
 static void __exit iptable_raw_fini(void)

net/ipv4/netfilter/iptable_security.c

@@ -66,10 +66,7 @@ static int __net_init iptable_security_net_init(struct net *net)
 	net->ipv4.iptable_security =
 		ipt_register_table(net, &security_table, repl);
 	kfree(repl);
-	if (IS_ERR(net->ipv4.iptable_security))
-		return PTR_ERR(net->ipv4.iptable_security);
-
-	return 0;
+	return PTR_RET(net->ipv4.iptable_security);
 }
 
 static void __net_exit iptable_security_net_exit(struct net *net)