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https://blog.csdn.net/my_xxh/article/details/48785667
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https://www.cnblogs.com/facous/p/6408050.html
Linux内核编程初探:块设备驱动程序——Ramdisk
https://blog.csdn.net/my_xxh/article/details/48785667
linux系统下块设备驱动程序
https://www.cnblogs.com/facous/p/6408050.html