--- /dev/null
+#ifndef USB__GADGET__CONFIGFS__H
+#define USB__GADGET__CONFIGFS__H
+
+#include <linux/configfs.h>
+
+void unregister_gadget_item(struct config_item *item);
+
+int usb_os_desc_prepare_interf_dir(struct config_group *parent,
+ int n_interf,
+ struct usb_os_desc **desc,
+ char **names,
+ struct module *owner);
+
+static inline struct usb_os_desc *to_usb_os_desc(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct usb_os_desc, group);
+}
+
+#endif /* USB__GADGET__CONFIGFS__H */