some notes in work

some notes in work

issues list

20250609

insmod self-defined kernel module on suse11sp3 error Unknown symbol __x86_indirect_thunk_r11 (err 0)

The self-defined kernel was compiled on suse11sp3 with kernel version 3.0.101-0.47.106 with `CONFIG_RETPOLINE=y`  
When it runs on suse11sp3 with kernel version 3.0.101-0.47.90, it shows error above.  

Check the configuration by `cat /boot/config-$(uname -r) | grep CONFIG_RETPOLINE`  
It had to recompile on lower version(0.47.90) and it runs normally on higher version(0.47.106)