On Monday, April 29, 2013 9:13 PM, Lars-Peter Clausen wrote:
> On 04/29/2013 07:41 AM, 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....@samsung.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.
> >
> >
> > --- 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),
> > },
> > };
>
> Won't that generate a warning about an unused s3c24xx_i2c_dev_pm_ops when
> CONFIG_PM is not enabled?
No, there is no build warning, when CONFIG_PM is not enabled.
In this way, of_match_ptr() macro has been already used
without build warnings.
Best regards,
Jingoo Han
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