[PATCH] Add a klist to struct device_driver for the devices bound to it.

- Use it in driver_for_each_device() instead of the regular list_head and stop using
  the bus's rwsem for protection.
- Use driver_for_each_device() in driver_detach() so we don't deadlock on the
  bus's rwsem.
- Remove ->devices.
- Move klist access and sysfs link access out from under device's semaphore, since
  they're synchronized through other means.

Signed-off-by: Patrick Mochel <mochel@digitalimplant.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

include/linux/device.h

@@ -105,7 +105,7 @@ struct device_driver {
 
 	struct completion	unloaded;
 	struct kobject		kobj;
-	struct list_head	devices;
+	struct klist		klist_devices;
 	struct klist_node	knode_bus;
 
 	struct module		* owner;
@@ -266,6 +266,7 @@ struct device {
 	struct list_head bus_list;	/* node in bus's list */
 	struct list_head driver_list;
 	struct list_head children;
+	struct klist_node	knode_driver;
 	struct klist_node	knode_bus;
 	struct device 	* parent;