linux-kernel - [PATCH v4 2/5] drivers: acpi: add dependency of EFI for arm64

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Date:   Mon, 23 Jul 2018 10:57:29 +0900
From:   AKASHI Takahiro <takahiro.akashi@...aro.org>
To:     catalin.marinas@....com, will.deacon@....com, rjw@...ysocki.net,
        lenb@...nel.org, ard.biesheuvel@...aro.org
Cc:     tbaicar@...eaurora.org, bhsharma@...hat.com, dyoung@...hat.com,
        james.morse@....com, mark.rutland@....com, al.stone@...aro.org,
        graeme.gregory@...aro.org, hanjun.guo@...aro.org,
        lorenzo.pieralisi@....com, sudeep.holla@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kexec@...ts.infradead.org,
        AKASHI Takahiro <takahiro.akashi@...aro.org>
Subject: [PATCH v4 2/5] drivers: acpi: add dependency of EFI for arm64

As Ard suggested, CONFIG_ACPI && !CONFIG_EFI doesn't make sense on arm64,
while CONFIG_ACPI and CONFIG_CPU_BIG_ENDIAN doesn't make sense either.

As CONFIG_EFI already has a dependency of !CONFIG_CPU_BIG_ENDIAN, it is
good enough to add a dependency of CONFIG_EFI to avoid any useless
combination of configuration.

This bug, reported by Will, will be revealed when my patch series,
"arm64: kexec,kdump: fix boot failures on acpi-only system," is applied
and the kernel is built under allmodconfig.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
Suggested-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
---
 drivers/acpi/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index b533eeb6139d..15ab1daaa808 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -6,7 +6,7 @@
 menuconfig ACPI
 	bool "ACPI (Advanced Configuration and Power Interface) Support"
 	depends on !IA64_HP_SIM
-	depends on IA64 || X86 || ARM64
+	depends on IA64 || X86 || (ARM64 && EFI)
 	depends on PCI
 	select PNP
 	default y if (IA64 || X86)
-- 
2.18.0