linux-kernel - Re: [PATCH] gpio: intel-mid: Fix build warning when !CONFIG

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Date:   Mon, 16 Jan 2017 16:59:38 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Augusto Mecking Caringi <augustocaringi@...il.com>
Cc:     David Cohen <david.a.cohen@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: intel-mid: Fix build warning when !CONFIG_PM

On Mon, Jan 16, 2017 at 4:30 PM, Augusto Mecking Caringi
<augustocaringi@...il.com> wrote:
> The only usage of function intel_gpio_runtime_idle() is here (in the
> same file):
>
> static const struct dev_pm_ops intel_gpio_pm_ops = {
>         SET_RUNTIME_PM_OPS(NULL, NULL, intel_gpio_runtime_idle)
> };
>
> And when CONFIG_PM is not set, the macro SET_RUNTIME_PM_OPS expands to
> nothing, causing the following compiler warning:
>
> drivers/gpio/gpio-intel-mid.c:324:12: warning: ‘intel_gpio_runtime_idle’
> defined but not used [-Wunused-function]
> static int intel_gpio_runtime_idle(struct device *dev)
>
> Fix it by annotating the function with __maybe_unused.

Acked-by: Andy Shevchenko <andy.shevchenko@...il.com>

>
> Signed-off-by: Augusto Mecking Caringi <augustocaringi@...il.com>
> ---
>  drivers/gpio/gpio-intel-mid.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-intel-mid.c b/drivers/gpio/gpio-intel-mid.c
> index a1e44c2..b76ecee 100644
> --- a/drivers/gpio/gpio-intel-mid.c
> +++ b/drivers/gpio/gpio-intel-mid.c
> @@ -321,7 +321,7 @@ static void intel_mid_irq_init_hw(struct intel_mid_gpio *priv)
>         }
>  }
>
> -static int intel_gpio_runtime_idle(struct device *dev)
> +static int __maybe_unused intel_gpio_runtime_idle(struct device *dev)
>  {
>         int err = pm_schedule_suspend(dev, 500);
>         return err ?: -EBUSY;
> --
> 2.7.4
>



-- 
With Best Regards,
Andy Shevchenko