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>

net/unix/af_unix.c

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index f255119..9bc9b92 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2224,7 +2224,7 @@
 };
 
 
-static int unix_net_init(struct net *net)
+static int __net_init unix_net_init(struct net *net)
 {
 	int error = -ENOMEM;
 
@@ -2243,7 +2243,7 @@
 	return error;
 }
 
-static void unix_net_exit(struct net *net)
+static void __net_exit unix_net_exit(struct net *net)
 {
 	unix_sysctl_unregister(net);
 	proc_net_remove(net, "unix");