Kernel: module接口ABI相关问题分析的思路；__GENKSYMS__；

参考

https://www.oreilly.com/library/view/linux-device-drivers/1565922921/ch11s04.html
http://ccrma.stanford.edu/planetccrma/man/man8/genksyms.8.html

命令genksyms

这个工具的源码再kernel源码里，需要自己build出来。

GENKSYMS

This macro is defined by make when preprocessing files to be read by genksyms to build new version codes. It is used to conditionally prevent inclusion of when building new checks