#include <linux/notifier.h>
  
  /**
   * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure.
   *
   * @subsys - the struct kset that defines this subsystem
   * @devices_kset - the subsystem's 'devices' directory
   * @interfaces - list of subsystem interfaces associated
   * @mutex - protect the devices, and interfaces lists.
   *
   * @drivers_kset - the list of drivers associated
   * @klist_devices - the klist to iterate over the @devices_kset
   * @klist_drivers - the klist to iterate over the @drivers_kset
   * @bus_notifier - the bus notifier list for anything that cares about things
   *                 on this bus.
   * @bus - pointer back to the struct bus_type that this structure is associated
   *        with.
   *
   * @glue_dirs - "glue" directory to put in-between the parent device to
   *              avoid namespace conflicts
   * @class - pointer back to the struct class that this structure is associated
   *          with.
   *
   * This structure is the one that is the actual kobject allowing struct
   * bus_type/class to be statically allocated safely.  Nothing outside of the
   * driver core should ever touch these fields.
   */
  struct subsys_private {
  	struct kset subsys;
  	struct kset *devices_kset;
  	struct list_head interfaces;
  	struct mutex mutex;
  
  	struct kset *drivers_kset;
  	struct klist klist_devices;
  	struct klist klist_drivers;
  	struct blocking_notifier_head bus_notifier;
  	unsigned int drivers_autoprobe:1;
  	struct bus_type *bus;
  
  	struct kset glue_dirs;
  	struct class *class;
  };
  #define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj)
  
  struct driver_private {
  	struct kobject kobj;
  	struct klist klist_devices;
  	struct klist_node knode_bus;
  	struct module_kobject *mkobj;
  	struct device_driver *driver;
  };
  #define to_driver(obj) container_of(obj, struct driver_private, kobj)
  
  /**
   * struct device_private - structure to hold the private to the driver core portions of the device structure.
   *
   * @klist_children - klist containing all children of this device
   * @knode_parent - node in sibling list
   * @knode_driver - node in driver list
   * @knode_bus - node in bus list
   * @deferred_probe - entry in deferred_probe_list which is used to retry the
   *	binding of drivers which were unable to get all the resources needed by
   *	the device; typically because it depends on another driver getting
   *	probed first.
   * @driver_data - private pointer for driver specific info.  Will turn into a
   * list soon.
   * @device - pointer back to the struct class that this structure is
   * associated with.
   *
   * Nothing outside of the driver core should ever touch these fields.
   */
  struct device_private {
  	struct klist klist_children;
  	struct klist_node knode_parent;
  	struct klist_node knode_driver;
  	struct klist_node knode_bus;
  	struct list_head deferred_probe;
  	void *driver_data;
  	struct device *device;
  };
  #define to_device_private_parent(obj)	\
  	container_of(obj, struct device_private, knode_parent)
  #define to_device_private_driver(obj)	\
  	container_of(obj, struct device_private, knode_driver)
  #define to_device_private_bus(obj)	\
  	container_of(obj, struct device_private, knode_bus)
  
  extern int device_private_init(struct device *dev);
  
  /* initialisation functions */
  extern int devices_init(void);
  extern int buses_init(void);
  extern int classes_init(void);
  extern int firmware_init(void);
  #ifdef CONFIG_SYS_HYPERVISOR
  extern int hypervisor_init(void);
  #else
  static inline int hypervisor_init(void) { return 0; }
  #endif
  extern int platform_bus_init(void);
  extern void cpu_dev_init(void);
  extern void container_dev_init(void);
  
  struct kobject *virtual_device_parent(struct device *dev);
  
  extern int bus_add_device(struct device *dev);
  extern void bus_probe_device(struct device *dev);
  extern void bus_remove_device(struct device *dev);
  
  extern int bus_add_driver(struct device_driver *drv);
  extern void bus_remove_driver(struct device_driver *drv);
  
  extern void driver_detach(struct device_driver *drv);
  extern int driver_probe_device(struct device_driver *drv, struct device *dev);
  extern void driver_deferred_probe_del(struct device *dev);
  static inline int driver_match_device(struct device_driver *drv,
  				      struct device *dev)
  {
  	return drv->bus->match ? drv->bus->match(dev, drv) : 1;
  }
  
  extern int driver_add_groups(struct device_driver *drv,
  			     const struct attribute_group **groups);
  extern void driver_remove_groups(struct device_driver *drv,
  				 const struct attribute_group **groups);
  
  extern int device_add_groups(struct device *dev,
  			     const struct attribute_group **groups);
  extern void device_remove_groups(struct device *dev,
  				 const struct attribute_group **groups);
  
  extern char *make_class_name(const char *name, struct kobject *kobj);
  
  extern int devres_release_all(struct device *dev);
  
  /* /sys/devices directory */
  extern struct kset *devices_kset;
  
  #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
  extern void module_add_driver(struct module *mod, struct device_driver *drv);
  extern void module_remove_driver(struct device_driver *drv);
  #else
  static inline void module_add_driver(struct module *mod,
  				     struct device_driver *drv) { }
  static inline void module_remove_driver(struct device_driver *drv) { }
  #endif
  
  #ifdef CONFIG_DEVTMPFS
  extern int devtmpfs_init(void);
  #else
  static inline int devtmpfs_init(void) { return 0; }
  #endif