On Sun, Aug 16, 2020 at 3:58 PM Bhaskar Chowdhury <unixbhaskar@gmail.com> wrote:
>
> I am scared that I might have missed something very obvious ...am I?? And the build abort...take a peek..
>
> ./arch/x86/include/asm/io.h:292:2: error: implicit declaration of function ‘slow_down_io’ [-Werror=implicit-function-declaration]

I'm not seeing how that would happen with a pristine codebase, but
send me your config just in case.

slow_down_io() is declared not that much further up in that file (or
in paravirt.h that gets included before for the CONFIG_PARAVIRT case).

             Linus