linux-kernel - Re: [PATCH v6 1/8] cpufreq: Store cpufreq policies in a list

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Date:	Fri, 26 Jul 2013 12:58:27 +0200
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <eduardo.valentin@...com>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>, durgadoss.r@...el.com
Subject: Re: [PATCH v6 1/8] cpufreq: Store cpufreq policies in a list

On Fri, 26 Jul 2013 15:44:29 +0530 Viresh Kumar viresh.kumar@...aro.org
wrote,
> On 25 July 2013 22:03, Lukasz Majewski <l.majewski@...sung.com> wrote:
> > Policies available in a cpufreq framework are now linked together.
> > They are accessible via cpufreq_policy_list defined at cpufreq core.
> >
> > Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
> > Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
> 
> Looks good but would have been better if you could have moved
> existing code to use this infrastructure..
> 
> For example, this code in __cpufreq_add_dev()
> 
> #ifdef CONFIG_HOTPLUG_CPU
> 	/* Check if this cpu was hot-unplugged earlier and has
> siblings */ read_lock_irqsave(&cpufreq_driver_lock, flags);
> 	for_each_online_cpu(sibling) {
> 
>          ---
> 
> 	}
> 	read_unlock_irqrestore(&cpufreq_driver_lock, flags);
> #endif

Do you mean to write something like:

#ifdef CONFIG_CPU_FREQ_BOOST_SW
	write_lock_irqsave(&cpufreq_driver_lock, flags);
	list_add(&policy->policy_list, &cpufreq_policy_list);
	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
#endif

Or Am I missing something?
-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
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