linux-kernel - Re: [RFC PATCH 1/4] cpufreq: governor: support scheduler cpufreq callbacks on remote CPUs

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Message-ID: <20160429103816.GC2927@vireshk-i7>
Date:	Fri, 29 Apr 2016 16:08:16 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Steve Muckle <steve.muckle@...aro.org>
Cc:	"Rafael J. Wysocki" <rafael@...nel.org>,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Juri Lelli <Juri.Lelli@....com>,
	Patrick Bellasi <patrick.bellasi@....com>,
	Michael Turquette <mturquette@...libre.com>
Subject: Re: [RFC PATCH 1/4] cpufreq: governor: support scheduler cpufreq
 callbacks on remote CPUs

On 19-04-16, 19:39, Steve Muckle wrote:
> diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
> index 20f0a4e114d1..429d3a5b9866 100644
> --- a/drivers/cpufreq/cpufreq_governor.c
> +++ b/drivers/cpufreq/cpufreq_governor.c
> @@ -248,6 +248,20 @@ static void dbs_irq_work(struct irq_work *irq_work)
>  	schedule_work_on(smp_processor_id(), &policy_dbs->work);
>  }
>  
> +#ifdef CONFIG_SMP
> +static inline void dbs_irq_work_queue(struct policy_dbs_info *policy_dbs,
> +				      int cpu)
> +{
> +	irq_work_queue_on(&policy_dbs->irq_work, cpu);
> +}
> +#else
> +static inline void dbs_irq_work_queue(struct policy_dbs_info *policy_dbs,
> +				      int cpu)
> +{
> +	irq_work_queue(&policy_dbs->irq_work);
> +}
> +#endif

Any clue, why we don't have a non-SMP version of irq_work_queue_on(), Which can
simply call irq_work_queue() ?

-- 
viresh