linux-kernel - [PATCH 5/7] usb: isp1301-omap: mark power_up as __maybe

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Date:	Thu, 28 Jan 2016 17:23:13 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Felipe Balbi <balbi@...nel.org>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>, Felipe Balbi <balbi@...com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Daniel Mack <daniel@...que.org>,
	Imre Kaloz <kaloz@...nwrt.org>,
	Krzysztof Halasa <khalasa@...p.pl>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-omap@...r.kernel.org
Subject: [PATCH 5/7] usb: isp1301-omap: mark power_up as __maybe_unused

The power_up function is used for otg or udc mode, but nost when
the driver is only configured for host mode:

drivers/usb/phy/phy-isp1301-omap.c:261:13: error: 'power_up' defined but not used [-Werror=unused-function]

This marks the function __maybe_unused to avoid the warning and
silently drop the definition when it is unused.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/usb/phy/phy-isp1301-omap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/phy/phy-isp1301-omap.c b/drivers/usb/phy/phy-isp1301-omap.c
index 3af263cc0caa..8d111ec653e4 100644
--- a/drivers/usb/phy/phy-isp1301-omap.c
+++ b/drivers/usb/phy/phy-isp1301-omap.c
@@ -258,7 +258,7 @@ static void power_down(struct isp1301 *isp)
 	isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
 }
 
-static void power_up(struct isp1301 *isp)
+static void __maybe_unused power_up(struct isp1301 *isp)
 {
 	// isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
 	isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
-- 
2.7.0