[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, 2 insertions, 1 deletions

diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index f66945cb158f..f79bd11a4701 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -774,7 +774,8 @@ static void tcpdiag_rcv(struct sock *sk, int len)
 
 static int __init tcpdiag_init(void)
 {
-        tcpnl = netlink_kernel_create(NETLINK_TCPDIAG, tcpdiag_rcv);
+        tcpnl = netlink_kernel_create(NETLINK_TCPDIAG, tcpdiag_rcv,
+                                      THIS_MODULE);
         if (tcpnl == NULL)
                 return -ENOMEM;
         return 0;