[AUTOSEL,for,4.4,072/162] arm64: pass endianness info to sparse

Commit Message

Sasha Levin April 9, 2018, 12:28 a.m. UTC

From: Luc Van Oostenryck <[e-mail]>

[ 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 <[e-mail]>
CC: Will Deacon <[e-mail]>
CC: [e-mail]
Signed-off-by: Luc Van Oostenryck <[e-mail]>
Signed-off-by: Will Deacon <[e-mail]>
Signed-off-by: Sasha Levin <[e-mail]>
---
 arch/arm64/Makefile | 2 ++
 1 file changed, 2 insertions(+)

Patch

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