linux-kernel - Re: [PATCH v2 1/2] cpufreq: add new attribute type cpufreq_freq_attr_wr

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Date:   Mon, 7 Nov 2016 10:05:54 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Markus Mayer <code@...yer.net>
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Power Management List <linux-pm@...r.kernel.org>,
        Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Markus Mayer <mmayer@...adcom.com>
Subject: Re: [PATCH v2 1/2] cpufreq: add new attribute type
 cpufreq_freq_attr_wr_perm()

On 07-11-16, 10:03, Viresh Kumar wrote:
> On 04-11-16, 09:55, Markus Mayer wrote:
> > From: Markus Mayer <mmayer@...adcom.com>
> > 
> > With the new attribute type, it is possible to create write-only
> > CPUfreq attributes.
> > 
> > Signed-off-by: Markus Mayer <mmayer@...adcom.com>
> > ---
> >  include/linux/cpufreq.h | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
> > index 5fa55fc..ed09930 100644
> > --- a/include/linux/cpufreq.h
> > +++ b/include/linux/cpufreq.h
> > @@ -234,6 +234,10 @@ __ATTR(_name, _perm, show_##_name, NULL)
> >  static struct freq_attr _name =			\
> >  __ATTR(_name, 0644, show_##_name, store_##_name)
> >  
> > +#define cpufreq_freq_attr_wr_perm(_name, _perm)	\
> 
> shouldn't this be _wo_perm ?
> 
> Also, I wouldn't mind doing this in the second patch itself.

Also there is no need to define a _perm variant here, and then you can avoid
sending 0200 as argument as well.

-- 
viresh