usb_device_cdev 2790 drivers/usb/core/devio.c static struct cdev usb_device_cdev; usb_device_cdev 2802 drivers/usb/core/devio.c cdev_init(&usb_device_cdev, &usbdev_file_operations); usb_device_cdev 2803 drivers/usb/core/devio.c retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); usb_device_cdev 2821 drivers/usb/core/devio.c cdev_del(&usb_device_cdev);