On Thu, Sep 03, 2020 at 02:45:08PM +0100, Ionela Voinescu wrote:
> Hi Sudeep,
>
> Thank you for your review here and for the other patches.
>
> On Wednesday 02 Sep 2020 at 14:28:38 (+0100), Sudeep Holla wrote:
> [..]
> > > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> > > index 4d5fe777184a..570bf2ebe9d4 100644
> > > --- a/drivers/cpufreq/cpufreq.c
> > > +++ b/drivers/cpufreq/cpufreq.c
> > > @@ -61,6 +61,12 @@ static struct cpufreq_driver *cpufreq_driver;
> > > static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
> > > static DEFINE_RWLOCK(cpufreq_driver_lock);
> > >
> > > +static DEFINE_STATIC_KEY_FALSE(cpufreq_freq_invariance);
> > > +bool cpufreq_supports_freq_invariance(void)
> > > +{
> > > + return static_branch_likely(&cpufreq_freq_invariance);
> > > +}
> > > +
> > > /* Flag to suspend/resume CPUFreq governors */
> > > static bool cpufreq_suspended;
> > >
> > > @@ -2720,6 +2726,15 @@ int cpufreq_register_driver(struct cpufreq_driver
> > > *driver_data)
> > > cpufreq_driver = driver_data;
> > > write_unlock_irqrestore(&cpufreq_driver_lock, flags);
> > >
> > > + /*
> > > + * Mark support for the scheduler's frequency invariance engine for
> > > + * drivers that implement target(), target_index() or fast_switch().
> > > + */
> > > + if (!cpufreq_driver->setpolicy) {
> > > + static_branch_enable_cpuslocked(&cpufreq_freq_invariance);
> > > + pr_debug("supports frequency invariance");
> > > + }
> > > +
> > > if (driver_data->setpolicy)
> >
> > [super nit] while I understand cpufreq_driver = driver_data, it looks odd
> > if 2 consecutive statements refer it with different variables. Or am I
> > confusing myself hugely.
> >
>
> No, you are right. If you look at the rest of the register function,
> after cpufreq_driver = driver_data, both driver_data and cpufreq_driver
> are used. For me using cpufreq_driver seemed more natural as after being
> assigned driver_data, it will continue to be used after registration.
>
Ah OK, I haven't seen the whole file/function, just looked at the patch.
> If it's alright with you I won't make this change for now. It's possible
> that a better solution is to change the other occurrences of either
> cpufreq_driver or driver_data in a separate patch, to make things
> consistent across the function.
>
I am fine to keep it as is, hence I mentioned it as super nit. If there
are other occurrences, then better to take it up separately.
--
Regards,
Sudeep
