63     minorct: usize,      // 次设备号数量  field
76     pub fn new(dev_t: DeviceNumber, minorct: usize, name: &'static str) -> Self {  in new()
79             minorct,  in new()
106     pub fn minorct(&self) -> usize {  in minorct()  method
107         self.minorct  in minorct()
191         minorct: usize,  in __register_chardev_region()
204         if minorct > MINOR_MASK + 1 - baseminor {  in __register_chardev_region()
206                 name, baseminor, baseminor + minorct - 1, 0, MINOR_MASK);  in __register_chardev_region()
208         let chardev = CharDeviceStruct::new(mkdev(major, baseminor), minorct, name);  in __register_chardev_region()
223                         if item.device_number().minor() + item.minorct() <= baseminor {  in __register_chardev_region()
226                         if item.base_minor() >= baseminor + minorct {  in __register_chardev_region()
245         minorct: usize,  in __unregister_chardev_region()
254                 if item.device_number() == device_number && item.minorct() == minorct {  in __unregister_chardev_region()