WorkQueue: Fix up arch-specific work items where possible

Fix up arch-specific work items where possible to use the new work_struct and
delayed_work structs.

Three places that enqueue bits of their stack and then return have been marked
with #error as this is not permitted.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index d925053..9c588af 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -714,6 +714,7 @@
 	spinlock_t lock;
 	struct work_struct watchdog_task;
 	struct work_struct tx_timeout_task;
+	struct net_device *netdev;
 	struct timer_list watchdog_timer;
 
 	u32 curr_window;
@@ -921,7 +922,7 @@
 		    struct netxen_port *port);
 int netxen_nic_rx_has_work(struct netxen_adapter *adapter);
 int netxen_nic_tx_has_work(struct netxen_adapter *adapter);
-void netxen_watchdog_task(unsigned long v);
+void netxen_watchdog_task(struct work_struct *work);
 void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx,
 			    u32 ringid);
 void netxen_process_cmd_ring(unsigned long data);