extern int bus_add_device(struct device * dev);extern void bus_remove_device(struct device * dev); extern int bus_add_driver(struct device_driver *);extern void bus_remove_driver(struct device_driver *); extern void driver_detach(struct device_driver * drv);extern int driver_probe_device(struct device_driver *, struct device *); static inline struct class_device *to_class_dev(struct kobject *obj){	return container_of(obj, struct class_device, kobj);} static inlinestruct class_device_attribute *to_class_dev_attr(struct attribute *_attr){	return container_of(_attr, struct class_device_attribute, attr);}