2     device::{mkdev, DeviceNumber, KObject},
62     dev_t: DeviceNumber, //起始设备号
76     pub fn new(dev_t: DeviceNumber, minorct: usize, name: &'static str) -> Self {  in new()  argument
89     pub fn device_number(&self) -> DeviceNumber {  in device_number()  argument
163         from: DeviceNumber,  in register_chardev_region()  argument
166     ) -> Result<DeviceNumber, SystemError> {  in register_chardev_region()  argument
180     ) -> Result<DeviceNumber, SystemError> {  in alloc_chardev_region()  argument
190         device_number: DeviceNumber,  in __register_chardev_region()  argument
193     ) -> Result<DeviceNumber, SystemError> {  in __register_chardev_region()  argument
244         device_number: DeviceNumber,  in __unregister_chardev_region()  argument
270     pub fn cdev_add(cdev: Arc<dyn CharDevice>, dev_t: DeviceNumber, range: usize) {  in cdev_add()  argument
282     pub fn cdev_del(dev_t: DeviceNumber, range: usize) {  in cdev_del()  argument