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Subject[PATCH v2] arm64: Kconfig: add a choice for endianness
When building allmodconfig KCONFIG_ALLCONFIG=$(pwd)/arch/arm64/configs/defconfig
CONFIG_CPU_BIG_ENDIAN gets enabled. Which tends not to be what most
people want. Another concern that has come up is that ACPI isn't built
for an allmodconfig kernel today since that also depends on !CPU_BIG_ENDIAN.

Rework so that we introduce a 'choice' and default the choice to
CPU_LITTLE_ENDIAN. That means that when we build an allmodconfig kernel
it will default to CPU_LITTLE_ENDIAN that most people tends to want.

Reviewed-by: John Garry <>
Signed-off-by: Anders Roxell <>
arch/arm64/Kconfig | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 64764ca92fca..c599b6b288be 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -877,10 +877,26 @@ config ARM64_PA_BITS
default 48 if ARM64_PA_BITS_48
default 52 if ARM64_PA_BITS_52

+ prompt "Endianness"
+ help
+ Select the endianness of data accesses performed by the CPU. Userspace
+ applications will need to be compiled and linked for the endianness
+ that is selected here.
bool "Build big-endian kernel"
- Say Y if you plan on running a kernel in big-endian mode.
+ Say Y if you plan on running a kernel with a big-endian userspace.
+ bool "Build little-endian kernel"
+ help
+ Say Y if you plan on running a kernel with a little-endian userspace.
+ This is usually the case for distributions targetting arm64.

config SCHED_MC
bool "Multi-core scheduler support"
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