Create patch file

Create patch file

diff -uN linux-3.4/init/main.c.orig linux-3.4/init/main.c > init-main.c.patch

打补丁
patch -p1 < debug_code.patch


-p 参数剥离层级


refernece:
https://www.cnblogs.com/zengkefu/p/7266913.html