linux-kernel - [PATCH 4.4 16/20] mfd: as3722: Mark PM functions as __maybe

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Date:   Thu, 21 Feb 2019 15:35:46 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Lee Jones <lee.jones@...aro.org>,
        Jon Hunter <jonathanh@...dia.com>
Subject: [PATCH 4.4 16/20] mfd: as3722: Mark PM functions as __maybe_unused

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@...db.de>

commit a7b956fd38dd217dd78e3058110929f5ac914df1 upstream.

The newly introduced as3722_i2c_suspend/resume functions are built
unconditionally, but only used when power management is enabled,
so we get a warning otherwise:

drivers/mfd/as3722.c:427:12: warning: 'as3722_i2c_suspend' defined but not used [-Wunused-function]
drivers/mfd/as3722.c:438:12: warning: 'as3722_i2c_resume' defined but not used [-Wunused-function]

This marks them both as __maybe_unused, which avoids an ugly #ifdef
and gives us best compile-time coverage. When they are unused, the
compiler will silently drop the functions from its output.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 35deff7eb212 ("mfd: as3722: Handle interrupts on suspend")
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Cc: Jon Hunter <jonathanh@...dia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mfd/as3722.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/mfd/as3722.c
+++ b/drivers/mfd/as3722.c
@@ -424,7 +424,7 @@ static int as3722_i2c_remove(struct i2c_
 	return 0;
 }
 
-static int as3722_i2c_suspend(struct device *dev)
+static int __maybe_unused as3722_i2c_suspend(struct device *dev)
 {
 	struct as3722 *as3722 = dev_get_drvdata(dev);
 
@@ -435,7 +435,7 @@ static int as3722_i2c_suspend(struct dev
 	return 0;
 }
 
-static int as3722_i2c_resume(struct device *dev)
+static int __maybe_unused as3722_i2c_resume(struct device *dev)
 {
 	struct as3722 *as3722 = dev_get_drvdata(dev);