linux-kernel - [PATCH v2 2/2] sparc: pass endianness info to sparse

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Date:   Thu,  9 Nov 2017 07:16:52 +0100
From:   Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Sam Ravnborg <sam@...nborg.org>, sparclinux@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] sparc: pass endianness info to sparse

sparc 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: David S. Miller <davem@...emloft.net>
CC: sparclinux@...r.kernel.org
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
---
 arch/sparc/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index a42aa114e..08d477faf 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -14,7 +14,7 @@ else
         KBUILD_DEFCONFIG := sparc64_defconfig
 endif
 
-CHECKFLAGS     += -D__sparc__
+CHECKFLAGS     += -D__sparc__ -mbig-endian
 
 ifeq ($(CONFIG_SPARC32),y)
 #####
-- 
2.14.0