SUNRPC: Remove rpc_clnt->cl_count

The kref now does most of what cl_count + cl_user used to do. The only
remaining role for cl_count is to tell us if we are in a 'shutdown'
phase. We can provide that information using a single bit field instead
of a full atomic counter.

Also rename rpc_destroy_client() to rpc_close_client(), which reflects
better what its role is these days.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index fe7ea65..cf03494 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -25,7 +25,6 @@
  */
 struct rpc_clnt {
 	struct kref		cl_kref;	/* Number of references */
-	atomic_t		cl_count;	/* Number of clones */
 	struct list_head	cl_clients;	/* Global list of clients */
 	struct list_head	cl_tasks;	/* List of tasks */
 	spinlock_t		cl_lock;	/* spinlock */
@@ -119,8 +118,7 @@
 struct rpc_clnt	*rpc_bind_new_program(struct rpc_clnt *,
 				struct rpc_program *, int);
 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
-int		rpc_shutdown_client(struct rpc_clnt *);
-int		rpc_destroy_client(struct rpc_clnt *);
+void		rpc_shutdown_client(struct rpc_clnt *);
 void		rpc_release_client(struct rpc_clnt *);
 void		rpc_register_client(struct rpc_clnt *);
 void		rpc_unregister_client(struct rpc_clnt *);