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Subject[PATCH] [SUBMITTED 20180724] arm64: fix ACPI dependencies
Date
Kconfig reports a warning on x86 builds after the ARM64 dependency
was added.

drivers/acpi/Kconfig:6:error: recursive dependency detected!
drivers/acpi/Kconfig:6: symbol ACPI depends on EFI

This rephrases the dependency to keep the ARM64 details out of the
shared Kconfig file, so Kconfig no longer gets confused by it.

For consistency, all three architectures that support ACPI now
select ARCH_SUPPORTS_ACPI in exactly the configuration in which
they allow it. We still need the 'default x86', as each one
wants a different default: default-y on x86, default-n on arm64,
and always-y on ia64.

Fixes: 5bcd44083a08 ("drivers: acpi: add dependency of EFI for arm64")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
v2: use 'select ARCH_SUPPORTS_ACPI' for all three.
---
arch/arm64/Kconfig | 1 +
arch/ia64/Kconfig | 1 +
arch/x86/Kconfig | 1 +
drivers/acpi/Kconfig | 8 +++++---
4 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index cdcaa6a798b2..2f987a938405 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1267,6 +1267,7 @@ config EFI
bool "UEFI runtime support"
depends on OF && !CPU_BIG_ENDIAN
depends on KERNEL_MODE_NEON
+ select ARCH_SUPPORTS_ACPI
select LIBFDT
select UCS2_STRING
select EFI_PARAMS_FROM_FDT
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index ff861420b8f5..02eb68d5d1c0 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -16,6 +16,7 @@ config IA64
select ARCH_MIGHT_HAVE_PC_SERIO
select PCI if (!IA64_HP_SIM)
select ACPI if (!IA64_HP_SIM)
+ select ARCH_SUPPORTS_ACPI if (!IA64_HP_SIM)
select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
select HAVE_UNSTABLE_SCHED_CLOCK
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 088b719bc5d1..442575220708 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -76,6 +76,7 @@ config X86
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
+ select ARCH_SUPPORTS_ACPI
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_NUMA_BALANCING if X86_64
select ARCH_USE_BUILTIN_BSWAP
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index a8da730fabc6..1edca05ee0ae 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -5,11 +5,10 @@

menuconfig ACPI
bool "ACPI (Advanced Configuration and Power Interface) Support"
- depends on !IA64_HP_SIM
- depends on IA64 || X86 || (ARM64 && EFI)
+ depends on ARCH_SUPPORTS_ACPI
depends on PCI
select PNP
- default y if (IA64 || X86)
+ default y if X86
help
Advanced Configuration and Power Interface (ACPI) support for
Linux requires an ACPI-compliant platform (hardware/firmware),
@@ -41,6 +40,9 @@ menuconfig ACPI
<http://www.acpi.info>
<http://www.uefi.org/acpi/specs>

+config ARCH_SUPPORTS_ACPI
+ bool
+
if ACPI

config ACPI_LEGACY_TABLES_LOOKUP
--
2.18.0
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