linux-kernel - Re: [PATCH] Cpufreq: Change sysfs interface cpuinfo_cur

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Date:	Mon, 25 Nov 2013 13:33:39 +0800
From:	Lan Tianyu <tianyu.lan@...el.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
CC:	"Rafael J. Wysocki" <rjw@...ysocki.net>, hg197@....de,
	"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>
Subject: Re: [PATCH] Cpufreq: Change sysfs interface cpuinfo_cur_freq access
 privilege

On 2013年11月25日 12:30, Viresh Kumar wrote:
> On 25 November 2013 08:23, Lan Tianyu <tianyu.lan@...el.com> wrote:
>> Currently, cpuinfo_cur_freq is only accessible for root user while
>> other cpufreq sysfs interfaces(E,G scaling_cur_freq) are available
>> to ordinary user. This seems make no sense. This patch is to change
>> it.
> 
> There is nothing wrong with the code and so this is more of a design
> change..
> 
> Probably Rafael can help us here as cpufreq_cur_freq will read stuff
> directly from hardware instead of using cached value in software.

I think so, too. I also tried to checking the reason of the privilege by
git log but the code was there before linux kernel being migrated to git
repository.

> 
> --
> viresh
> 


-- 
Best regards
Tianyu Lan
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