linux-kernel - [PATCH 07/17] ARM: at91: skip at91_io

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Date:	Tue,  2 Oct 2012 18:36:46 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...radead.org
Cc:	arm@...nel.org, linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Subject: [PATCH 07/17] ARM: at91: skip at91_io_desc definition for NOMMU

On NOMMU systems, we do cannot remap the MMIO space, so the
definition of at91_io_desc is unused.

Without this patch, building at91x40_defconfig results in:

arch/arm/mach-at91/setup.c:90:24: warning: 'at91_io_desc' defined but not used [-Wunused-variable]

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: Nicolas Ferre <nicolas.ferre@...el.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
---
 arch/arm/mach-at91/setup.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index 944bffb..b9fdba0 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -87,12 +87,14 @@ void __init at91_init_sram(int bank, unsigned long base, unsigned int length)
 	iotable_init(desc, 1);
 }
 
+#ifdef CONFIG_MMU
 static struct map_desc at91_io_desc __initdata = {
 	.virtual	= AT91_VA_BASE_SYS,
 	.pfn		= __phys_to_pfn(AT91_BASE_SYS),
 	.length		= SZ_16K,
 	.type		= MT_DEVICE,
 };
+#endif
 
 static void __init soc_detect(u32 dbgu_base)
 {
-- 
1.7.10

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