linux-kernel - Re: [PATCH 206/228] cpufreq: sa11x0: remove calls to cpufreq_notify

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Message-ID: <CAKohpomAj0wDnjdi7XXw=bGsu0LMRrr1SMwdzBsa0GTxGrABoQ@mail.gmail.com>
Date:	Fri, 13 Sep 2013 21:42:23 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Patch Tracking <patches@...aro.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 206/228] cpufreq: sa11x0: remove calls to cpufreq_notify_transition()

On 13 September 2013 21:24, Russell King - ARM Linux
<linux@....linux.org.uk> wrote:
> On Fri, Sep 13, 2013 at 06:32:32PM +0530, Viresh Kumar wrote:
>> Most of the drivers do following in their ->target_index() routines:
>>
>>       struct cpufreq_freqs freqs;
>>       freqs.old = old freq...
>>       freqs.new = new freq...
>>
>>       cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
>>
>>       /* Change rate here */
>>
>>       cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
>>
>> This is replicated over all cpufreq drivers today and there doesn't exists a
>> good enough reason why this shouldn't be moved to cpufreq core instead.
>>
>> Earlier patches have added support in cpufreq core to do cpufreq notification on
>> frequency change, this one removes it from this driver.
>>
>> Some related minor cleanups are also done along with it.
>>
>> Cc: Russell King <linux@....linux.org.uk>
>> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
>
> Shouldn't this patch set CPUFREQ_ASYNC_NOTIFICATION somewhere?

As far as I can see, sa11x0 completes frequency transition from within
target() and so it does it synchronously.. And so it doesn't need to set
CPUFREQ_ASYNC_NOTIFICATION...

Am I missing something?
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