Mon, 31 Mar 2014 08:38:48 +0100 от Lee Jones <lee.jones@xxxxxxxxxx>:
> > Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
> >
> > Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
> > ---
> > drivers/video/backlight/pwm_bl.c | 17 ++++-------------
> > 1 file changed, 4 insertions(+), 13 deletions(-)
> >
> > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> > index b75201f..d5e1f5b 100644
> > --- a/drivers/video/backlight/pwm_bl.c
> > +++ b/drivers/video/backlight/pwm_bl.c
>
> [...]
>
> > -static int pwm_backlight_resume(struct device *dev)
> > +static int __maybe_unused pwm_bl_resume(struct device *dev)
>
> What's the __maybe_unused attribute for?
>
> In include/linux/compiler-gcc.h it redefines the attribute as 'unused':
>
> #define __maybe_unused __attribute__((unused))
>
> ... are you sure this is what you want?
Yes. This avoids compiler warnings if CONFIG_PM is unset.
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