net: spread __net_init, __net_exit

__net_init/__net_exit are apparently not going away, so use them
to full extent.

In some cases __net_init was removed, because it was called from
__net_exit code.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 82f2dea..6963a6b 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2113,7 +2113,7 @@
 	},
 };
 
-int tcp6_proc_init(struct net *net)
+int __net_init tcp6_proc_init(struct net *net)
 {
 	return tcp_proc_register(net, &tcp6_seq_afinfo);
 }
@@ -2182,18 +2182,18 @@
 				INET_PROTOSW_ICSK,
 };
 
-static int tcpv6_net_init(struct net *net)
+static int __net_init tcpv6_net_init(struct net *net)
 {
 	return inet_ctl_sock_create(&net->ipv6.tcp_sk, PF_INET6,
 				    SOCK_RAW, IPPROTO_TCP, net);
 }
 
-static void tcpv6_net_exit(struct net *net)
+static void __net_exit tcpv6_net_exit(struct net *net)
 {
 	inet_ctl_sock_destroy(net->ipv6.tcp_sk);
 }
 
-static void tcpv6_net_exit_batch(struct list_head *net_exit_list)
+static void __net_exit tcpv6_net_exit_batch(struct list_head *net_exit_list)
 {
 	inet_twsk_purge(&tcp_hashinfo, &tcp_death_row, AF_INET6);
 }