linux-kernel - Re: [PATCH 2/2] cpufreq: Specify default governor on command line

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Message-ID: <20200616095644.GA150003@google.com>
Date:   Tue, 16 Jun 2020 10:56:44 +0100
From:   Quentin Perret <qperret@...gle.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     rjw@...ysocki.net, rafael@...nel.org, arnd@...db.de,
        mpe@...erman.id.au, benh@...nel.crashing.org, paulus@...ba.org,
        mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        kernel-team@...roid.com, tkjos@...gle.com, adharmap@...eaurora.org
Subject: Re: [PATCH 2/2] cpufreq: Specify default governor on command line

On Tuesday 16 Jun 2020 at 15:24:38 (+0530), Viresh Kumar wrote:
> On 16-06-20, 10:48, Quentin Perret wrote:
> > ---8<---
> > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> > index 0f05caedc320..a9219404e07f 100644
> > --- a/drivers/cpufreq/cpufreq.c
> > +++ b/drivers/cpufreq/cpufreq.c
> > @@ -2340,6 +2340,11 @@ int cpufreq_register_governor(struct cpufreq_governor *governor)
> >  		list_add(&governor->governor_list, &cpufreq_governor_list);
> >  	}
> >  
> > +	if (!strncasecmp(cpufreq_param_governor, governor->name, CPUFREQ_NAME_LEN))
> > +		default_governor = governor;
> > +	else if (!default_governor && cpufreq_default_governor() == governor)
> > +		default_governor = cpufreq_default_governor();
> 
> Instead of the else part here, maybe just do this from
> cpufreq_core_init() only once, and so we will always have
> default_governor set.

Sounds good.

Thanks!
Quentin