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Message-Id: <20190929173053.8400-18-sashal@kernel.org>
Date: Sun, 29 Sep 2019 13:30:18 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Nick Desaulniers <ndesaulniers@...gle.com>,
Arnd Bergmann <arnd@...db.de>,
Linus Walleij <linus.walleij@...aro.org>,
Russell King <rmk+kernel@...linux.org.uk>,
Sasha Levin <sashal@...nel.org>,
clang-built-linux@...glegroups.com
Subject: [PATCH AUTOSEL 5.3 18/49] ARM: 8875/1: Kconfig: default to AEABI w/ Clang
From: Nick Desaulniers <ndesaulniers@...gle.com>
[ Upstream commit a05b9608456e0d4464c6f7ca8572324ace57a3f4 ]
Clang produces references to __aeabi_uidivmod and __aeabi_idivmod for
arm-linux-gnueabi and arm-linux-gnueabihf targets incorrectly when AEABI
is not selected (such as when OABI_COMPAT is selected).
While this means that OABI userspaces wont be able to upgraded to
kernels built with Clang, it means that boards that don't enable AEABI
like s3c2410_defconfig will stop failing to link in KernelCI when built
with Clang.
Link: https://github.com/ClangBuiltLinux/linux/issues/482
Link: https://groups.google.com/forum/#!msg/clang-built-linux/yydsAAux5hk/GxjqJSW-AQAJ
Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
arch/arm/Kconfig | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 24360211534ab..5e2c68e9dd6e2 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1572,8 +1572,9 @@ config ARM_PATCH_IDIV
code to do integer division.
config AEABI
- bool "Use the ARM EABI to compile the kernel" if !CPU_V7 && !CPU_V7M && !CPU_V6 && !CPU_V6K
- default CPU_V7 || CPU_V7M || CPU_V6 || CPU_V6K
+ bool "Use the ARM EABI to compile the kernel" if !CPU_V7 && \
+ !CPU_V7M && !CPU_V6 && !CPU_V6K && !CC_IS_CLANG
+ default CPU_V7 || CPU_V7M || CPU_V6 || CPU_V6K || CC_IS_CLANG
help
This option allows for the kernel to be compiled using the latest
ARM ABI (aka EABI). This is only useful if you are using a user
--
2.20.1
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