Commit dce5c9e3 authored by Will Deacon's avatar Will Deacon Committed by Russell King
Browse files

ARM: 7928/1: kconfig: select HAVE_EFFICIENT_UNALIGNED_ACCESS for CPUv6+ && MMU 



Modern ARM CPUs can perform efficient unaligned memory accesses in
hardware and this feature is relied up on by code such as the dcache
word-at-a-time name hashing.

This patch selects HAVE_EFFICIENT_UNALIGNED_ACCESS for these cores and
reworks the kconfig select logic for DCACHE_WORD_ACCESS to use the new
symbol.

Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent cb601185

arch/arm/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -12,7 +12,7 @@ config ARM 
	select BUILDTIME_EXTABLE_SORT if MMU

	select CLONE_BACKWARDS

	select CPU_PM if (SUSPEND || CPU_IDLE)

	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU

	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS

	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)

	select GENERIC_CLOCKEVENTS_BROADCAST if SMP

	select GENERIC_IDLE_POLL_SETUP
@@ -36,6 +36,7 @@ config ARM 
	select HAVE_DMA_ATTRS

	select HAVE_DMA_CONTIGUOUS if MMU

	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)

	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU

	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)

	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)

	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)

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