c6f7e72a3f
struct bus_type is static everywhere in the kernel. This moves the kobject in the structure out of it, and a bunch of other private only to the driver core fields are now moved to a private structure. This lets us dynamically create the backing kobject properly and gives us the chance to be able to document to users exactly how to use the struct bus_type as there are no fields they can improperly access. Thanks to Kay for the build fixes on this patch. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
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/**
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* struct bus_type_private - structure to hold the private to the driver core portions of the bus_type structure.
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*
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* @subsys - the struct kset that defines this bus. This is the main kobject
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* @drivers_kset - the list of drivers associated with this bus
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* @devices_kset - the list of devices associated with this bus
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* @klist_devices - the klist to iterate over the @devices_kset
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* @klist_drivers - the klist to iterate over the @drivers_kset
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* @bus_notifier - the bus notifier list for anything that cares about things
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* on this bus.
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* @bus - pointer back to the struct bus_type that this structure is associated
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* with.
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*
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* This structure is the one that is the actual kobject allowing struct
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* bus_type to be statically allocated safely. Nothing outside of the driver
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* core should ever touch these fields.
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*/
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struct bus_type_private {
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struct kset subsys;
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struct kset *drivers_kset;
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struct kset *devices_kset;
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struct klist klist_devices;
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struct klist klist_drivers;
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struct blocking_notifier_head bus_notifier;
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unsigned int drivers_autoprobe:1;
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struct bus_type *bus;
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};
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/* initialisation functions */
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extern int devices_init(void);
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extern int buses_init(void);
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extern int classes_init(void);
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extern int firmware_init(void);
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#ifdef CONFIG_SYS_HYPERVISOR
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extern int hypervisor_init(void);
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#else
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static inline int hypervisor_init(void) { return 0; }
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#endif
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extern int platform_bus_init(void);
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extern int system_bus_init(void);
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extern int cpu_dev_init(void);
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extern int attribute_container_init(void);
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extern int bus_add_device(struct device * dev);
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extern void bus_attach_device(struct device * dev);
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extern void bus_remove_device(struct device * dev);
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extern int bus_add_driver(struct device_driver *);
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extern void bus_remove_driver(struct device_driver *);
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extern void driver_detach(struct device_driver * drv);
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extern int driver_probe_device(struct device_driver *, struct device *);
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extern void sysdev_shutdown(void);
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extern int sysdev_suspend(pm_message_t state);
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extern int sysdev_resume(void);
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static inline struct class_device *to_class_dev(struct kobject *obj)
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{
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return container_of(obj, struct class_device, kobj);
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}
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static inline
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struct class_device_attribute *to_class_dev_attr(struct attribute *_attr)
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{
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return container_of(_attr, struct class_device_attribute, attr);
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}
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extern char *make_class_name(const char *name, struct kobject *kobj);
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extern int devres_release_all(struct device *dev);
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extern struct kset *devices_kset;
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