diff --git a/drivers/base/base.h b/drivers/base/base.h
new file mode 100644
index 0000000..8d1e8bd
--- /dev/null
+++ b/drivers/base/base.h
@@ -0,0 +1,18 @@
+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 *);
+
+static inline struct class_device *to_class_dev(struct kobject *obj)
+{
+	return container_of(obj, struct class_device, kobj);
+}
+
+static inline
+struct class_device_attribute *to_class_dev_attr(struct attribute *_attr)
+{
+	return container_of(_attr, struct class_device_attribute, attr);
+}
+
+