linux-kernel - Re: [PATCH] PM: Add pm_ops

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Date:	Tue, 30 Apr 2013 09:21:34 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	"'Rafael J. Wysocki'" <rjw@...k.pl>
Cc:	'Andrew Morton' <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, 'Len Brown' <len.brown@...el.com>,
	'Pavel Machek' <pavel@....cz>, linux-pm@...r.kernel.org,
	Jingoo Han <jg1.han@...sung.com>
Subject: Re: [PATCH] PM: Add pm_ops_ptr() macro

On Monday, April 29, 2013 8:35 PM, Rafael J. Wysocki:
> On Monday, April 29, 2013 02:41:48 PM Jingoo Han wrote:
> > On Saturday, April 27, 2013 11:41 PM, Rafael J. Wysocki:
> > >
> > > On Saturday, April 27, 2013 11:54:50 AM Jingoo Han wrote:
> > > > Add pm_ops_ptr() macro that allows the .pm entry in the driver structures
> > > > to be assigned without having an #define xxx NULL for the case that PM is
> > > > not enabled.
> > > >
> > > > Signed-off-by: Jingoo Han <jg1.han@...sung.com>
> > >
> > > First, I'm not taking any more PM patches for v3.10 (that don't fix recent
> > > regressions).
> > >
> > > Second, please add that macro along with a user.
> >
> > Hi Rafael,
> >
> > This macro can be used as below:
> > This macro cannot affect the procedure of suspend/resume
> > calls; thus, there is no side effect.
> > It just reduces the code size of each drivers.
> > In this way, of_match_ptr() macro has been already used.
> 
> OK, so care to fold the below into your original patch?

OK, I will fold it into my original patch.
Then, I will send v2 patch, soon.
Thank you.

Best regards,
Jingoo Han

> 
> Rafael
> 
> 
> > --- a/drivers/i2c/busses/i2c-s3c2410.c
> > +++ b/drivers/i2c/busses/i2c-s3c2410.c
> > @@ -1218,7 +1218,6 @@ static int s3c24xx_i2c_resume(struct device *dev)
> >  }
> >  #endif
> >
> > -#ifdef CONFIG_PM
> >  static const struct dev_pm_ops s3c24xx_i2c_dev_pm_ops = {
> >  #ifdef CONFIG_PM_SLEEP
> >         .suspend_noirq = s3c24xx_i2c_suspend_noirq,
> > @@ -1226,11 +1225,6 @@ static const struct dev_pm_ops s3c24xx_i2c_dev_pm_ops = {
> >  #endif
> >  };
> >
> > -#define S3C24XX_DEV_PM_OPS (&s3c24xx_i2c_dev_pm_ops)
> > -#else
> > -#define S3C24XX_DEV_PM_OPS NULL
> > -#endif
> > -
> >  /* device driver for platform bus bits */
> >
> >  static struct platform_driver s3c24xx_i2c_driver = {
> > @@ -1240,7 +1234,7 @@ static struct platform_driver s3c24xx_i2c_driver = {
> >         .driver         = {
> >                 .owner  = THIS_MODULE,
> >                 .name   = "s3c-i2c",
> > -               .pm     = S3C24XX_DEV_PM_OPS,
> > +               .pm     = pm_ops_ptr(&s3c24xx_i2c_dev_pm_ops),
> >                 .of_match_table = of_match_ptr(s3c24xx_i2c_match),
> >         },
> >  };
> >
> > Best regards,
> > Jingoo Han
> >
> >
> > >
> > > Thanks,
> > > Rafael
> > >
> > >
> > > > ---
> > > >  include/linux/pm.h |    2 ++
> > > >  1 files changed, 2 insertions(+), 0 deletions(-)
> > > >
> > > > diff --git a/include/linux/pm.h b/include/linux/pm.h
> > > > index a224c7f..bd50d15 100644
> > > > --- a/include/linux/pm.h
> > > > +++ b/include/linux/pm.h
> > > > @@ -55,8 +55,10 @@ struct device;
> > > >
> > > >  #ifdef CONFIG_PM
> > > >  extern const char power_group_name[];		/* = "power" */
> > > > +#define pm_ops_ptr(_ptr)	(_ptr)
> > > >  #else
> > > >  #define power_group_name	NULL
> > > > +#define pm_ops_ptr(_ptr)	NULL
> > > >  #endif
> > > >
> > > >  typedef struct pm_message {
> > > >
> > > --
> > > I speak only for myself.
> > > Rafael J. Wysocki, Intel Open Source Technology Center.
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-pm" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> --
> I speak only for myself.
> Rafael J. Wysocki, Intel Open Source Technology Center.

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