[NETLINK]: Add properly module refcounting for kernel netlink sockets.

- Remove bogus code for compiling netlink as module
- Add module refcounting support for modules implementing a netlink
  protocol
- Add support for autoloading modules that implement a netlink protocol
  as soon as someone opens a socket for that protocol

Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 8da3e25b2c4..33ceeea783b 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1519,7 +1519,8 @@ static int __init xfrm_user_init(void)
 {
         printk(KERN_INFO "Initializing IPsec netlink socket\n");
 
-        xfrm_nl = netlink_kernel_create(NETLINK_XFRM, xfrm_netlink_rcv);
+        xfrm_nl = netlink_kernel_create(NETLINK_XFRM, xfrm_netlink_rcv,
+                                        THIS_MODULE);
         if (xfrm_nl == NULL)
                 return -ENOMEM;
 
@@ -1537,3 +1538,4 @@ static void __exit xfrm_user_exit(void)
 module_init(xfrm_user_init);
 module_exit(xfrm_user_exit);
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);