内核模块同进程对话有两种主要途径。一种是通过设备文件（比如/dev 目录中的文件），另一种是使用proc文件系统。我们把一些东西写入内核的一个主要原因就是支持一些硬件设备，所以我们从设备文件开始。　　-Kernel module with the process of dialogue has two main ways. One is through the device file (such as/dev files in the directory), and the other is using the proc file system. We have to put things to write a major cause of the kernel is to support some hardware devices, so we started from the device file.