linux-kernel - [4.4-stable 01/22] gpio: xgene: mark PM functions as __maybe

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Message-Id: <20180220115527.1806578-2-arnd@arndb.de>
Date:   Tue, 20 Feb 2018 12:54:48 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     stable@...r.kernel.org, Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>
Cc:     Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>, linux-gpio@...r.kernel.org
Subject: [4.4-stable 01/22] gpio: xgene: mark PM functions as __maybe_unused

When CONFIG_PM_SLEEP is disabled, we get a warning about unused functions:

drivers/gpio/gpio-xgene.c:155:12: warning: 'xgene_gpio_resume' defined but not used [-Wunused-function]
 static int xgene_gpio_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~
drivers/gpio/gpio-xgene.c:142:12: warning: 'xgene_gpio_suspend' defined but not used [-Wunused-function]
 static int xgene_gpio_suspend(struct device *dev)

The warnings are harmless and can be avoided by simplifying the code and marking
the functions as __maybe_unused.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
(cherry picked from commit b115bebc07f282067eccc06fd5aa3060ab1426da)
[arnd: backported to 4.4-stable]
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpio/gpio-xgene.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c
index 18a8182d4fec..7f1f32324504 100644
--- a/drivers/gpio/gpio-xgene.c
+++ b/drivers/gpio/gpio-xgene.c
@@ -42,9 +42,7 @@ struct xgene_gpio {
 	struct gpio_chip	chip;
 	void __iomem		*base;
 	spinlock_t		lock;
-#ifdef CONFIG_PM
 	u32			set_dr_val[XGENE_MAX_GPIO_BANKS];
-#endif
 };
 
 static inline struct xgene_gpio *to_xgene_gpio(struct gpio_chip *chip)
@@ -132,8 +130,7 @@ static int xgene_gpio_dir_out(struct gpio_chip *gc,
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int xgene_gpio_suspend(struct device *dev)
+static __maybe_unused int xgene_gpio_suspend(struct device *dev)
 {
 	struct xgene_gpio *gpio = dev_get_drvdata(dev);
 	unsigned long bank_offset;
@@ -146,7 +143,7 @@ static int xgene_gpio_suspend(struct device *dev)
 	return 0;
 }
 
-static int xgene_gpio_resume(struct device *dev)
+static __maybe_unused int xgene_gpio_resume(struct device *dev)
 {
 	struct xgene_gpio *gpio = dev_get_drvdata(dev);
 	unsigned long bank_offset;
@@ -160,10 +157,6 @@ static int xgene_gpio_resume(struct device *dev)
 }
 
 static SIMPLE_DEV_PM_OPS(xgene_gpio_pm, xgene_gpio_suspend, xgene_gpio_resume);
-#define XGENE_GPIO_PM_OPS	(&xgene_gpio_pm)
-#else
-#define XGENE_GPIO_PM_OPS	NULL
-#endif
 
 static int xgene_gpio_probe(struct platform_device *pdev)
 {
@@ -230,7 +223,7 @@ static struct platform_driver xgene_gpio_driver = {
 	.driver = {
 		.name = "xgene-gpio",
 		.of_match_table = xgene_gpio_of_match,
-		.pm     = XGENE_GPIO_PM_OPS,
+		.pm     = &xgene_gpio_pm,
 	},
 	.probe = xgene_gpio_probe,
 	.remove = xgene_gpio_remove,
-- 
2.9.0