ccw_device_unregister 1120 drivers/s390/cio/device.c ccw_device_unregister(cdev); ccw_device_unregister 1525 drivers/s390/cio/device.c ccw_device_unregister(cdev); ccw_device_unregister 2102 drivers/s390/cio/device.c ccw_device_unregister(cdev);