Dev is the device number (0, 1, 0) obtained from cdrecord -scanbus.
dev是从cdrecord -scanbus获得的设备号(0,1,0)。
The device associated with the frame buffer is /dev/fb0 (Major Number 29, Minor Number 0).
与帧缓冲区有关的设备是 /dev/fb0（主设备号29，次设备号0）。
So, what major number does the device driver developer supply with the call to register_? Dev ?
那么，设备驱动程序开发人员为调用register _——？dev提供的主设备号应该是什么呢？
So, what major number does the device driver developer supply with the call to register_? Dev ?
那么，设备驱动程序开发人员为调用register _——？dev提供的主设备号应该是什么呢？
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