tipc: purge signal handler infrastructure

In the previous commits of this series, we removed all asynchronous
actions which were based on the tasklet handler - "tipc_k_signal()".

So the moment has now come when we can completely remove the tasklet
handler infrastructure. That is done with this commit.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/Makefile

@@ -5,7 +5,7 @@
 obj-$(CONFIG_TIPC) := tipc.o
 
 tipc-y	+= addr.o bcast.o bearer.o config.o \
-	   core.o handler.o link.o discover.o msg.o  \
+	   core.o link.o discover.o msg.o  \
 	   name_distr.o  subscr.o name_table.o net.o  \
 	   netlink.o node.o node_subscr.o port.o ref.o  \
 	   socket.o log.o eth_media.o server.o

net/tipc/core.c

@@ -80,7 +80,6 @@ struct sk_buff *tipc_buf_acquire(u32 size)
  */
 static void tipc_core_stop(void)
 {
-	tipc_handler_stop();
 	tipc_net_stop();
 	tipc_bearer_cleanup();
 	tipc_netlink_stop();
@@ -100,10 +99,6 @@ static int tipc_core_start(void)
 
 	get_random_bytes(&tipc_random, sizeof(tipc_random));
 
-	err = tipc_handler_start();
-	if (err)
-		goto out_handler;
-
 	err = tipc_ref_table_init(tipc_max_ports, tipc_random);
 	if (err)
 		goto out_reftbl;
@@ -146,8 +141,6 @@ static int tipc_core_start(void)
 out_nametbl:
 	tipc_ref_table_stop();
 out_reftbl:
-	tipc_handler_stop();
-out_handler:
 	return err;
 }
 

net/tipc/core.h

@@ -89,8 +89,6 @@ extern int tipc_random __read_mostly;
 /*
  * Routines available to privileged subsystems
  */
-int tipc_handler_start(void);
-void tipc_handler_stop(void);
 int tipc_netlink_start(void);
 void tipc_netlink_stop(void);
 int tipc_socket_init(void);
@@ -109,12 +107,10 @@ void tipc_unregister_sysctl(void);
 #endif
 
 /*
- * TIPC timer and signal code
+ * TIPC timer code
  */
 typedef void (*Handler) (unsigned long);
 
-u32 tipc_k_signal(Handler routine, unsigned long argument);
-
 /**
  * k_init_timer - initialize a timer
  * @timer: pointer to timer structure