usb_alloc_dev
rhdev = usb_alloc_dev(NULL, &hcd->self, 0);
udev = usb_alloc_dev(hdev, hdev->bus, port1);
DEFINE_EVENT(usb_core_log_usb_device, usb_alloc_dev,
EXPORT_SYMBOL_GPL(usb_alloc_dev);
udev = usb_alloc_dev(hdev, hdev->bus, lvs->portnum);
extern struct usb_device *usb_alloc_dev(struct usb_device *parent,