int val);
int usb_add_config_only(struct usb_composite_dev *cdev,
struct usb_configuration *config);
+void usb_remove_function(struct usb_configuration *c, struct usb_function *f);
#define DECLARE_USB_FUNCTION(_name, _inst_alloc, _func_alloc) \
static struct usb_function_driver _name ## usb_func = { \