1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/base/base.h b/drivers/base/base.h
index 2c9ae43e2219..31dc0cd84afa 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -36,6 +36,33 @@ struct driver_private {
 };
 #define to_driver(obj) container_of(obj, struct driver_private, kobj)
 
+
+/**
+ * struct class_private - structure to hold the private to the driver core portions of the class structure.
+ *
+ * @class_subsys - the struct kset that defines this class.  This is the main kobject
+ * @class_devices - list of devices associated with this class
+ * @class_interfaces - list of class_interfaces associated with this class
+ * @class_dirs - "glue" directory for virtual devices associated with this class
+ * @class_mutex - mutex to protect the children, devices, and interfaces lists.
+ * @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
+ * class to be statically allocated safely.  Nothing outside of the driver
+ * core should ever touch these fields.
+ */
+struct class_private {
+        struct kset class_subsys;
+        struct list_head class_devices;
+        struct list_head class_interfaces;
+        struct kset class_dirs;
+        struct mutex class_mutex;
+        struct class *class;
+};
+#define to_class(obj)   \
+        container_of(obj, struct class_private, class_subsys.kobj)
+
 /* initialisation functions */
 extern int devices_init(void);
 extern int buses_init(void);