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

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Message-Id: <1484577077-13418-1-git-send-email-augustocaringi@gmail.com>
Date:   Mon, 16 Jan 2017 14:30:41 +0000
From:   Augusto Mecking Caringi <augustocaringi@...il.com>
To:     David Cohen <david.a.cohen@...ux.intel.com>
Cc:     Augusto Mecking Caringi <augustocaringi@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] gpio: intel-mid: Fix build warning when !CONFIG_PM

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.

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