arm64: kconfig: select HAVE_EFFICIENT_UNALIGNED_ACCESS

ARMv8 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 arm64.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit 50afc33a90e710c02d9bbf2f3673936365f0e690)
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 075075f9d247f3016b395344ab201c5b0926e0d7..61ef3f0de6ee60ad0312ddaa577d879f0860d301 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -26,6 +26,7 @@ config ARM64
        select HAVE_DEBUG_KMEMLEAK
        select HAVE_DMA_API_DEBUG
        select HAVE_DMA_ATTRS
+       select HAVE_EFFICIENT_UNALIGNED_ACCESS
        select HAVE_GENERIC_DMA_COHERENT
        select HAVE_GENERIC_HARDIRQS
        select HAVE_HW_BREAKPOINT if PERF_EVENTS