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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.9 146/293] arm64: pass endianness info to sparse
Thread-Topic: [PATCH AUTOSEL for 4.9 146/293] arm64: pass endianness info to
 sparse
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Date:   Mon, 9 Apr 2018 00:24:47 +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 bc66f4b6a1cb..b0babc09577d 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -48,11 +48,13 @@ KBUILD_AFLAGS	+=3D $(lseinstr)
=20
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+=3D -mbig-endian
+CHECKFLAGS	+=3D -D__AARCH64EB__
 AS		+=3D -EB
 LD		+=3D -EB
 UTS_MACHINE	:=3D aarch64_be
 else
 KBUILD_CPPFLAGS	+=3D -mlittle-endian
+CHECKFLAGS	+=3D -D__AARCH64EL__
 AS		+=3D -EL
 LD		+=3D -EL
 UTS_MACHINE	:=3D aarch64
--=20
2.15.1