The Cleanup Function
因此，有时，代码的不同布局证明更成功。Every nontrivial module also requires a cleanup function, which unregisters interfaces and returns all resources to the system before the module is removed. This function is defined as: 每个重要的模块还需要一个清理函数，该函数在删除模块之前取消注册接口并将所有资源返回给系统。
