linux-kernel - Re: [PATCH] drm: komeda: Make rt_pm_ops dependent on CONFIG

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Message-ID: <20200305184255.GH364558@e110455-lin.cambridge.arm.com>
Date:   Thu, 5 Mar 2020 18:42:55 +0000
From:   Liviu Dudau <liviu.dudau@....com>
To:     Vincenzo Frascino <vincenzo.frascino@....com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        "James (Qian) Wang" <james.qian.wang@....com>,
        Mihail Atanassov <mihail.atanassov@....com>,
        Brian Starkey <brian.starkey@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH] drm: komeda: Make rt_pm_ops dependent on CONFIG_PM

On Wed, Mar 04, 2020 at 02:54:12PM +0000, Vincenzo Frascino wrote:
> komeda_rt_pm_suspend() and komeda_rt_pm_resume() are compiled only when
> CONFIG_PM is enabled. Having it disabled triggers the following warning
> at compile time:
> 
> linux/drivers/gpu/drm/arm/display/komeda/komeda_drv.c:156:12:
> warning: ‘komeda_rt_pm_resume’ defined but not used [-Wunused-function]
>  static int komeda_rt_pm_resume(struct device *dev)
>             ^~~~~~~~~~~~~~~~~~~
> linux/drivers/gpu/drm/arm/display/komeda/komeda_drv.c:149:12:
> warning: ‘komeda_rt_pm_suspend’ defined but not used [-Wunused-function]
>  static int komeda_rt_pm_suspend(struct device *dev)
> 
> Make komeda_rt_pm_suspend() and komeda_rt_pm_resume() dependent on
> CONFIG_PM to address the issue.
> 
> Cc: "James (Qian) Wang" <james.qian.wang@....com>
> Cc: Liviu Dudau <liviu.dudau@....com>
> Cc: Mihail Atanassov <mihail.atanassov@....com>
> Cc: Brian Starkey <brian.starkey@....com>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>

Acked-by: Liviu Dudau <liviu.dudau@....com>

Thanks for the patch, I will push it into drm-misc-fixes tomorrow.

Best regards,
Liviu

> ---
>  drivers/gpu/drm/arm/display/komeda/komeda_drv.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> index ea5cd1e17304..dd3ae3d88687 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> @@ -146,6 +146,7 @@ static const struct of_device_id komeda_of_match[] = {
>  
>  MODULE_DEVICE_TABLE(of, komeda_of_match);
>  
> +#ifdef CONFIG_PM
>  static int komeda_rt_pm_suspend(struct device *dev)
>  {
>  	struct komeda_drv *mdrv = dev_get_drvdata(dev);
> @@ -159,6 +160,7 @@ static int komeda_rt_pm_resume(struct device *dev)
>  
>  	return komeda_dev_resume(mdrv->mdev);
>  }
> +#endif /* CONFIG_PM */
>  
>  static int __maybe_unused komeda_pm_suspend(struct device *dev)
>  {
> -- 
> 2.25.1
> 

-- 
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