What does suffix ' ... isra.0' mean in compiled symbols in GCC 10.2?

Hi, all

Does anybody know what does '.....isra.0' mean in GCC 10.2 compiled objects?

I just noticed this issue when using bcc/eBPF tools. I submitted the detail into * https://github.com/iovisor/bcc/issues/3293

Simply put, when building a linux kernel with GCC 10.2, the symbol 'finish_task_switch' becomes 'finish_task_switch.isra.0' in the object (as reported by 'nm')

Because a lot of kernel tracers (such as bcc) use 'finish_task_switch' as the probe point, this change in the compilation result can make all result such tools fail.

Thanks. Best regards, Guodong Xu