On Tue, 24 Aug 2021 09:14:30 -0000, SeongJae Park said:

> > > ERROR: modpost: "cpu_scale" [drivers/cpufreq/qcom-cpufreq-hw.ko] undefined!
> >
> > That's a different patch, am working on fixing that one now..
>
> I didn't take a deep look here, so I unsure if this is an appropriate fix, but
> I was able to work-around this issue for my use case with below change.
>

>  DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
> +EXPORT_PER_CPU_SYMBOL_GPL(cpu_scale);

Aha.  That's the part I wasn't finding.  Would you like to submit your patch,
or shall I send it in with a "Suggested-by" for you?