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/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index d453d07..fbd7869 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -74,7 +74,6 @@
 		     (addr)->s6_addr32[2] ^ (addr)->s6_addr32[3]) & \
 		    (HASH_SIZE - 1))
 
-static void ip6_fb_tnl_dev_init(struct net_device *dev);
 static void ip6_tnl_dev_init(struct net_device *dev);
 static void ip6_tnl_dev_setup(struct net_device *dev);
 
@@ -1364,7 +1363,7 @@
  * Return: 0
  **/
 
-static void ip6_fb_tnl_dev_init(struct net_device *dev)
+static void __net_init ip6_fb_tnl_dev_init(struct net_device *dev)
 {
 	struct ip6_tnl *t = netdev_priv(dev);
 	struct net *net = dev_net(dev);
@@ -1388,7 +1387,7 @@
 	.priority	=	1,
 };
 
-static void ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n)
+static void __net_exit ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n)
 {
 	int h;
 	struct ip6_tnl *t;
@@ -1407,7 +1406,7 @@
 	unregister_netdevice_many(&list);
 }
 
-static int ip6_tnl_init_net(struct net *net)
+static int __net_init ip6_tnl_init_net(struct net *net)
 {
 	struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 	int err;
@@ -1436,7 +1435,7 @@
 	return err;
 }
 
-static void ip6_tnl_exit_net(struct net *net)
+static void __net_exit ip6_tnl_exit_net(struct net *net)
 {
 	struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);