linux-kernel - Re: [PATCH] Input: eKTF2127: mark PM functions as __maybe

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Date:   Fri, 30 Sep 2016 15:37:28 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Siebren Vroegindeweij <siebren.vroegindeweij@...mail.com>,
        Rob Herring <robh@...nel.org>,
        Michel Verlaan <michel.verl@...il.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: eKTF2127: mark PM functions as __maybe_unused

On Fri, Sep 30, 2016 at 06:22:33PM +0200, Arnd Bergmann wrote:
> The newly added ektf2127 driver uses the SIMPLE_DEV_PM_OPS macro
> to conditionally refer to the resume/suspend functions, which
> causes a warning when CONFIG_PM_SLEEP is disabled:
> 
> drivers/input/touchscreen/ektf2127.c:168:12: error: 'ektf2127_resume' defined but not used [-Werror=unused-function]
> drivers/input/touchscreen/ektf2127.c:156:12: error: 'ektf2127_suspend' defined but not used [-Werror=unused-function]
> 
> We could either put these functions inside of an #ifdef or
> add __maybe_unused annotations. This uses the second approach,
> which is generally more foolproof.
> 
> Fixes: 9ca5bf5029b6 ("Input: add support for Elan eKTF2127 touchscreen controller")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thank you.

> ---
>  drivers/input/touchscreen/ektf2127.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/ektf2127.c b/drivers/input/touchscreen/ektf2127.c
> index 31a2dd7f38aa..0ed34ff787ce 100644
> --- a/drivers/input/touchscreen/ektf2127.c
> +++ b/drivers/input/touchscreen/ektf2127.c
> @@ -153,7 +153,7 @@ static void ektf2127_stop(struct input_dev *dev)
>  	gpiod_set_value_cansleep(ts->power_gpios, 0);
>  }
>  
> -static int ektf2127_suspend(struct device *dev)
> +static int __maybe_unused ektf2127_suspend(struct device *dev)
>  {
>  	struct ektf2127_ts *ts = i2c_get_clientdata(to_i2c_client(dev));
>  
> @@ -165,7 +165,7 @@ static int ektf2127_suspend(struct device *dev)
>  	return 0;
>  }
>  
> -static int ektf2127_resume(struct device *dev)
> +static int __maybe_unused ektf2127_resume(struct device *dev)
>  {
>  	struct ektf2127_ts *ts = i2c_get_clientdata(to_i2c_client(dev));
>  
> -- 
> 2.9.0
> 

-- 
Dmitry