[PATCH v7 3/4] arm64: Provide an AMU-based version of arch_freq_avg_get_on_cpu

[Beata Michalska]

On Tue, Oct 29, 2024 at 12:23:19PM +0530, Viresh Kumar wrote:
> On 10-10-24, 13:08, Beata Michalska wrote:
> > That is a fair point but I am not entirely convinced using '0' instead makes
> > things any more clearer as this is in no way a valid CPU frequency.
> > As long as we document the expected behaviour keeping the interface well
> > defined,  both options should be fine I guess.
> > 
> > @Viresh: what is your opinion on that one ?
> 
> Failing to get frequency for the CPU shouldn't be represented by 0,
> even if it is confusing for the user.
We still need to decide  whether provide a more descriptive way of informing
about such cases (whether it be 'unknown' or 'idle' ) or to simply return
an appropriate error and leave the userspace with dealing with that.

---
Thanks
Beata
> 
> -- 
> viresh