* Added get_root() to device_manager_info. Surprisingly enough, it

returns the root device node. Now its actually possible to
  traverse the device node tree without a node to start with.
* Fixed execution order problem in dm_get_next_child_node(). The
  supplied node was put first (which could cause its immediate
  deletion), but was still accessed thereafter.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16268 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/device_manager.h

@@ -77,6 +77,7 @@ typedef struct device_manager_info {
 					device_node_handle *node);
 	status_t (*unregister_device)(device_node_handle node);
 
+	device_node_handle (*get_root)();
 	status_t (*get_next_child_device)(device_node_handle parent,
 		device_node_handle *_node, const device_attr *attrs);
 	device_node_handle (*get_parent)(device_node_handle node);
@@ -165,6 +166,7 @@ struct driver_module_info {
 #define B_MISC_DRIVER_TYPE			"misc"
 #define B_NETWORK_DRIVER_TYPE		"net"
 #define B_VIDEO_DRIVER_TYPE			"video"
+#define B_INTERRUPT_CONTROLLER_DRIVER_TYPE	"interrupt controller"
 
 #define PNP_DRIVER_CONNECTION "connection"
 	// connection of parent the device is attached to (optional, string)