net: Pass kern from net_proto_family.create to sk_alloc

In preparation for changing how struct net is refcounted
on kernel sockets pass the knowledge that we are creating
a kernel socket from sock_create_kern through to sk_alloc.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/caif/caif_socket.c

@@ -1047,7 +1047,7 @@ static int caif_create(struct net *net, struct socket *sock, int protocol,
 	 * is really not used at all in the net/core or socket.c but the
 	 * initialization makes sure that sock->state is not uninitialized.
 	 */
-	sk = sk_alloc(net, PF_CAIF, GFP_KERNEL, &prot);
+	sk = sk_alloc(net, PF_CAIF, GFP_KERNEL, &prot, kern);
 	if (!sk)
 		return -ENOMEM;