linux-kernel - [PATCH 6/6] phy: twl4030: use __maybe

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Date:	Wed,  2 Mar 2016 16:24:08 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kishon Vijay Abraham I <kishon@...com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Felipe Balbi <balbi@...nel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-usb@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] phy: twl4030: use __maybe_unused to hide pm functions

The twl4030 USB PHY driver uses UNIVERSAL_DEV_PM_OPS to access
its suspend/resume functions, which causes a warning about
unused symbols when CONFIG_PM is disabled:

drivers/phy/phy-twl4030-usb.c:394:12: error: 'twl4030_usb_runtime_suspend' defined but not used [-Werror=unused-function]
drivers/phy/phy-twl4030-usb.c:408:12: error: 'twl4030_usb_runtime_resume' defined but not used [-Werror=unused-function]

This adds __maybe_unused annotations to let the compiler know
it can silently drop the function definition.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/phy/phy-twl4030-usb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c
index 840f3eae428b..6b6af6cba454 100644
--- a/drivers/phy/phy-twl4030-usb.c
+++ b/drivers/phy/phy-twl4030-usb.c
@@ -391,7 +391,7 @@ static void __twl4030_phy_power(struct twl4030_usb *twl, int on)
 	WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
 }
 
-static int twl4030_usb_runtime_suspend(struct device *dev)
+static int __maybe_unused twl4030_usb_runtime_suspend(struct device *dev)
 {
 	struct twl4030_usb *twl = dev_get_drvdata(dev);
 
@@ -405,7 +405,7 @@ static int twl4030_usb_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int twl4030_usb_runtime_resume(struct device *dev)
+static int __maybe_unused twl4030_usb_runtime_resume(struct device *dev)
 {
 	struct twl4030_usb *twl = dev_get_drvdata(dev);
 	int res;
-- 
2.7.0