| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.4 072/162] arm64: pass endianness info to sparse | Date | Mon, 9 Apr 2018 00:28:35 +0000 |
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From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
[ Upstream commit bcde519e8c325f3cc1fcf443eb6466e6bb3a3aca ]
ARM64 depends on the macro __AARCH64EB__ being defined or not to correctly select or define endian-specific macros, structures or pieces of code.
This macro is predefined by the compiler but sparse knows nothing about it and thus may pre-process files differently from what gcc would.
Fix this by passing '-D__AARCH64EL__' or '-D__AARCH64EB__' to sparse depending of the endianness of the kernel, like defined by GCC.
Note: In most case it won't change anything since most arm64 use little-endian (but an allyesconfig would use big-endian!).
CC: Catalin Marinas <catalin.marinas@arm.com> CC: Will Deacon <will.deacon@arm.com> CC: linux-arm-kernel@lists.infradead.org Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- arch/arm64/Makefile | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 119d1885a3c0..95c667328b5d 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -32,10 +32,12 @@ KBUILD_AFLAGS += $(lseinstr) ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) KBUILD_CPPFLAGS += -mbig-endian +CHECKFLAGS += -D__AARCH64EB__ AS += -EB LD += -EB else KBUILD_CPPFLAGS += -mlittle-endian +CHECKFLAGS += -D__AARCH64EL__ AS += -EL LD += -EL endif -- 2.15.1
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