From 39b175a0092d4a8e0875c67df82285475b1da591 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 4 Dec 2012 12:57:11 +0100 Subject: [PATCH] ARM: 7593/1: nommu: do not enable DCACHE_WORD_ACCESS when !CONFIG_MMU Commit b9a50f74905a ("ARM: 7450/1: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs") added support for word-at-time path comparisons, relying on the ability to perform unaligned loads with negligible performance impact in hardware. For nommu configurations without MPU support, this is unpredictable and so we should fall back to the byte-by-byte routines. Acked-by: Nicolas Pitre Tested-by: Jonathan Austin Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index a40e5f6..27ebd9b 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -7,7 +7,7 @@ config ARM select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_EXTABLE_SORT if MMU select CPU_PM if (SUSPEND || CPU_IDLE) - select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN + select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI) select GENERIC_CLOCKEVENTS_BROADCAST if SMP select GENERIC_IRQ_PROBE -- 2.7.4