linux-kernel - [PATCH 05/12] ARM: mmp: mark usb_dma_mask as __maybe

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Message-Id: <20170720155209.3250880-2-arnd@arndb.de>
Date:   Thu, 20 Jul 2017 17:51:43 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Eric Miao <eric.y.miao@...il.com>,
        Haojian Zhuang <haojian.zhuang@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 05/12] ARM: mmp: mark usb_dma_mask as __maybe_unused

This variable may be used by some devices that each have their
on Kconfig symbol, or by none of them, and that causes a build
warning:

arch/arm/mach-mmp/devices.c:241:12: error: 'usb_dma_mask' defined but not used [-Werror=unused-variable]

Marking it __maybe_unused avoids the warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
Originally sent in Feb 2016, this went missing for some reason.
---
 arch/arm/mach-mmp/devices.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-mmp/devices.c b/arch/arm/mach-mmp/devices.c
index 3330ac7cfbef..671c7a09ab3d 100644
--- a/arch/arm/mach-mmp/devices.c
+++ b/arch/arm/mach-mmp/devices.c
@@ -238,7 +238,7 @@ void pxa_usb_phy_deinit(void __iomem *phy_reg)
 #endif
 
 #if IS_ENABLED(CONFIG_USB_SUPPORT)
-static u64 usb_dma_mask = ~(u32)0;
+static u64 __maybe_unused usb_dma_mask = ~(u32)0;
 
 #if IS_ENABLED(CONFIG_USB_MV_UDC)
 struct resource pxa168_u2o_resources[] = {
-- 
2.9.0