ARM: 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. Signed-off-by: Will Deacon <[email protected]> Change-Id: I41559fc9255229e2601f4bef28aa8d48246156b7 Signed-off-by: Francisco Franco <[email protected]>
franciscofranco · May 11, 2018 · 86381da · 86381da
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commit 86381da
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
@@ -18,6 +18,7 @@ config ARM
 	select HAVE_ARCH_MMAP_RND_BITS if MMU
 	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
 	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
+	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
 	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
 	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
 	select HAVE_GENERIC_DMA_COHERENT