usb_string_id 1201 drivers/usb/gadget/composite.c EXPORT_SYMBOL_GPL(usb_string_id); usb_string_id 179 drivers/usb/gadget/function/f_loopback.c id = usb_string_id(cdev); usb_string_id 199 drivers/usb/gadget/function/f_serial.c status = usb_string_id(c->cdev); usb_string_id 516 include/linux/usb/composite.h extern int usb_string_id(struct usb_composite_dev *c);