linux-kernel - Re: [PATCH v3 6/9] drivers: remove useless comment from base/arch

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Date:   Mon, 10 Apr 2017 15:02:14 +0100
From:   Juri Lelli <juri.lelli@....com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        peterz@...radead.org, vincent.guittot@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, sudeep.holla@....com,
        lorenzo.pieralisi@....com, catalin.marinas@....com,
        will.deacon@....com, morten.rasmussen@....com,
        dietmar.eggemann@....com, broonie@...nel.org,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v3 6/9] drivers: remove useless comment from
 base/arch_topology.c

Hi,

On 10/04/17 14:51, Russell King - ARM Linux wrote:
> On Mon, Mar 27, 2017 at 02:18:22PM +0100, Juri Lelli wrote:
> > Printing out an error message when we failed to get the cpu device is
> > not helping anyone. Remove it.
> 
> (1) the subject line talks about removing a "comment" but you're
>     actually removing an error printk
> (2) I don't think it's "not helping anyone", although the description
>     above doesn't say _why_ - it's reporting the lack of a missing CPU
>     device that we expect to be present.  If it's not present, then
>     we're not going to end up with the cpu capacity attribute, and the
>     error message answers the "why is that sysfs file missing" question.

That's the same I was thinking when I put the error message there in the
first place. But, then Greg didn't seem to like it.

> 
> I think a better commit message is needed for this change.
> 

We could just skip this patch entirely. Or, of course, I can easily
update the commit message.

Which way is to be preferred?

Thanks,

- Juri

> > 
> > Signed-off-by: Juri Lelli <juri.lelli@....com>
> > ---
> >  drivers/base/arch_topology.c | 6 ++----
> >  1 file changed, 2 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> > index c33482121b7d..b24d9a2af2c5 100644
> > --- a/drivers/base/arch_topology.c
> > +++ b/drivers/base/arch_topology.c
> > @@ -81,11 +81,9 @@ static int register_cpu_capacity_sysctl(void)
> >  
> >  	for_each_possible_cpu(i) {
> >  		cpu = get_cpu_device(i);
> > -		if (!cpu) {
> > -			pr_err("%s: too early to get CPU%d device!\n",
> > -			       __func__, i);
> > +		if (!cpu)
> >  			continue;
> > -		}
> > +
> >  		device_create_file(cpu, &dev_attr_cpu_capacity);
> >  	}
> >  
> > -- 
> > 2.10.0
> > 
> 
> -- 
> RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
> FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
> according to speedtest.net.