linux-kernel - [PATCH] m32r: pass endianness info to sparse

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Message-Id: <20171031172213.10039-1-luc.vanoostenryck@gmail.com>
Date:   Tue, 31 Oct 2017 18:22:13 +0100
From:   Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To:     trivial@...nel.org
Cc:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] m32r: pass endianness info to sparse

m32r is big-endian only but sparse assumes the same endianness
as the building machine.
This is problematic for code which expect __BYTE_ORDER__ being
correctly predefined by the compiler which sparse can then
pre-process differently from what gcc would, depending on the
building machine endianness.

Fix this by letting sparse know about the architecture endianness.

To: trivial@...nel.org
CC: linux-kernel@...r.kernel.org
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
---
 arch/m32r/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/m32r/Makefile b/arch/m32r/Makefile
index def8dd0b6..fbdaf03a6 100644
--- a/arch/m32r/Makefile
+++ b/arch/m32r/Makefile
@@ -29,7 +29,7 @@ aflags-$(CONFIG_ISA_M32R)	+= -DNO_FPU -O2 -Wa,-no-bitinst
 KBUILD_CFLAGS += $(cflags-y)
 KBUILD_AFLAGS += $(aflags-y)
 
-CHECKFLAGS	+= -D__m32r__ -D__BIG_ENDIAN__=1
+CHECKFLAGS	+= -D__m32r__ -D__BIG_ENDIAN__=1 -mbig-endian
 
 head-y	:= arch/m32r/kernel/head.o
 
-- 
2.14.0