linux-kernel - Re: [PATCH v7 2/3] trivial: PM / Hibernate: clean up checkpatch in hibernate.c

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Date:	Wed, 05 Feb 2014 12:07:33 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Sebastian Capella <sebastian.capella@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-pm@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, Pavel Machek <pavel@....cz>,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH v7 2/3] trivial: PM / Hibernate: clean up checkpatch in hibernate.c

On Tuesday, February 04, 2014 04:24:13 PM Sebastian Capella wrote:
> Quoting Rafael J. Wysocki (2014-02-04 16:28:13)
> > On Tuesday, February 04, 2014 04:06:42 PM Sebastian Capella wrote:
> > > Quoting Rafael J. Wysocki (2014-02-04 16:03:29)
> > > > On Tuesday, February 04, 2014 03:22:22 PM Sebastian Capella wrote:
> > > > > Quoting Sebastian Capella (2014-02-04 14:37:33)
> > > > > > Quoting Rafael J. Wysocki (2014-02-04 13:36:29)
> > > > > > > >  static int __init resumedelay_setup(char *str)
> > > > > > > >  {
> > > > > > > > -     resume_delay = simple_strtoul(str, NULL, 0);
> > > > > > > > +     int ret = kstrtoint(str, 0, &resume_delay);
> > > > > > > > +     /* mask must_check warn; on failure, leaves resume_delay unchanged */
> > > > > > > > +     (void)ret;
> > > > > 
> > > > > One unintended consequence of this change is that it'll now accept a
> > > > > negative integer parameter.
> > > > 
> > > > Well, what about using kstrtouint(), then?
> > > I was thinking of doing something like:
> > > 
> > >       int delay, res;
> > >       res = kstrtoint(str, 0, &delay);
> > >       if (!res && delay >= 0)
> > >               resume_delay = delay;
> > >       return 1;
> > 
> > It uses simple_strtoul() for a reason.  You can change the type of resume_delay
> > to match, but the basic question is:
> > 
> > Why exactly do you want to change that thing?
> 
> This entire patch is a result of a single checkpatch warning from a printk
> that I indented.
> 
> I was hoping to be helpful by removing all of the warnings from this
> file, since I was going to have a separate cleanup patch for the printk.
> 
> I can see this is not a good direction.
> 
> Would it be better also to leave the file's printks as they were and drop
> the cleanup patch completely?

Well, I had considered changing them to pr_something, but decided that it
wasn't worth the effort.  Quite frankly, I'd leave the code as is. :-)

Thanks!

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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