1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/base/base.h b/drivers/base/base.h
index 0a5f055dffba..b676f8f801f8 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -63,6 +63,32 @@ struct class_private {
 #define to_class(obj)   \
         container_of(obj, struct class_private, class_subsys.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
+ * @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 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)
+
 /* initialisation functions */
 extern int devices_init(void);
 extern int buses_init(void);