5             device_number::{DeviceNumber, Major},
550         from: DeviceNumber,  in register_blockdev_region()  argument
553     ) -> Result<DeviceNumber, SystemError> {  in register_blockdev_region()  argument
567     ) -> Result<DeviceNumber, SystemError> {  in alloc_blockdev_region()  argument
569             DeviceNumber::new(Major::UNNAMED_MAJOR, baseminor),  in alloc_blockdev_region()
581         device_number: DeviceNumber,  in __register_blockdev_region()  argument
584     ) -> Result<DeviceNumber, SystemError> {  in __register_blockdev_region()  argument
595         if minorct > DeviceNumber::MINOR_MASK + 1 - baseminor {  in __register_blockdev_region()
597                 name, baseminor, baseminor + minorct - 1, 0, DeviceNumber::MINOR_MASK);  in __register_blockdev_region()
599         let blockdev = DeviceStruct::new(DeviceNumber::new(major, baseminor), minorct, name);  in __register_blockdev_region()
627         return Ok(DeviceNumber::new(major, baseminor));  in __register_blockdev_region()
636         device_number: DeviceNumber,  in __unregister_blockdev_region()  argument
673     pub fn bdev_del(_devnum: DeviceNumber, _range: usize) {  in bdev_del()  argument