linux-kernel - Re: [PATCH] thermal/intel_powerclamp: add const to thermal_cooling_device

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Date:   Thu, 29 Jun 2017 20:08:33 +0800
From:   Zhang Rui <rui.zhang@...el.com>
To:     Bhumika Goyal <bhumirks@...il.com>
Cc:     Julia Lawall <julia.lawall@...6.fr>,
        Eduardo Valentin <edubezval@...il.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: Re: [PATCH] thermal/intel_powerclamp: add const to
 thermal_cooling_device_ops structure

On Thu, 2017-06-29 at 11:26 +0530, Bhumika Goyal wrote:
> On Thu, Jun 29, 2017 at 11:02 AM, Zhang Rui <rui.zhang@...el.com>
> wrote:
> > 
> > On Thu, 2017-06-29 at 10:41 +0530, Bhumika Goyal wrote:
> > > 
> > > On Thu, Jun 29, 2017 at 8:30 AM, Zhang Rui <rui.zhang@...el.com>
> > > wrote:
> > > > 
> > > > 
> > > > On Wed, 2017-06-21 at 12:39 +0530, Bhumika Goyal wrote:
> > > > > 
> > > > > 
> > > > > Declare thermal_cooling_device_ops structure as const as it
> > > > > is
> > > > > only
> > > > > passed
> > > > > as an argument to the function
> > > > > thermal_cooling_device_register
> > > > > and
> > > > > this
> > > > > argument is of type const. So, declare the structure as
> > > > > const.
> > > > > 
> > > > I checked the source and the code is written in this way as
> > > > well in
> > > > some other drivers, why not fix them altogether?
> > > > 
> > > Hey,
> > > 
> > > I have already sent the patches for the drivers requiring this
> > > change.
> > > Some of them got applied as well.
> > I mean the other drivers that use thermal_cooling_device_ops.
> > 
> Actually, I also meant the same but maybe I wasn't clear enough :)
> 
> > 
> > Surely I can applied this patch, but still it would be nice if you
> > can
> > check the other places that defines thermal_cooling_device_ops and
> > fix
> > all of them in one time. :)
> > 
> I checked again and there remains only one file in power/supply where
> thermal_cooling_device_ops can be made const. I will submit a patch
> for it but I think I will have to create a separate patch because the
> maintainers are different.
> All other places are either already const


>  or I have submitted patches
> for them

am I in the loop of the patches? because I was not aware of those
changes.

thanks,
rui
>  or cannot be made const.
> 
> Thanks,
> Bhumika
> 
> > 
> > thanks,
> > rui
> > > 
> > > 
> > > Thanks,
> > > Bhumika
> > > 
> > > > 
> > > > 
> > > > thanks,
> > > > rui
> > > > > 
> > > > > 
> > > > > Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
> > > > > ---
> > > > >  drivers/thermal/intel_powerclamp.c | 2 +-
> > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > > 
> > > > > diff --git a/drivers/thermal/intel_powerclamp.c
> > > > > b/drivers/thermal/intel_powerclamp.c
> > > > > index d718cd1..e4c68b7 100644
> > > > > --- a/drivers/thermal/intel_powerclamp.c
> > > > > +++ b/drivers/thermal/intel_powerclamp.c
> > > > > @@ -659,7 +659,7 @@ static int
> > > > > powerclamp_set_cur_state(struct
> > > > > thermal_cooling_device *cdev,
> > > > >  }
> > > > > 
> > > > >  /* bind to generic thermal layer as cooling device*/
> > > > > -static struct thermal_cooling_device_ops
> > > > > powerclamp_cooling_ops
> > > > > = {
> > > > > +static const struct thermal_cooling_device_ops
> > > > > powerclamp_cooling_ops = {
> > > > >       .get_max_state = powerclamp_get_max_state,
> > > > >       .get_cur_state = powerclamp_get_cur_state,
> > > > >       .set_cur_state = powerclamp_set_cur_state,