ARM: 7928/1: kconfig: select HAVE_EFFICIENT_UNALIGNED_ACCESS for CPUv…

…6+ && 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: Will Deacon <[email protected]> Signed-off-by: Russell King <[email protected]>
farmergreg · Dec 29, 2013 · dce5c9e · dce5c9e
1 parent cb60118
commit dce5c9e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
@@ -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)