From 145167650b96967d6b726efef978c74831e6b2bd Mon Sep 17 00:00:00 2001
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Date: Mon, 28 May 2018 20:27:35 +0200
Subject: [PATCH] kbuild: add endianness flag to CHEKCFLAGS
The kernel depends on macros like __BYTE_ORDER__,
__BIG_ENDIAN__ or __LITTLE_ENDIAN__.
OTOH, sparse doesn't know about the endianness of the kernel and
by default uses the same as the machine on which sparse was built.
Ensure that sparse can predefine the macros corresponding to
how the kernel was configured by adding -m{big,little}-endian
to CHECKFLAGS in the main Makefile (and so for all archs).
Also, remove the equivalent done in arch specific Makefiles.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
Makefile | 3 +++
arch/openrisc/Makefile | 1 -
arch/parisc/Makefile | 2 +-
arch/s390/Makefile | 2 +-
4 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
index 1617ab517819f..68982ba7bc2f7 100644
--- a/Makefile
+++ b/Makefile
@@ -874,6 +874,9 @@ ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
LDFLAGS_vmlinux += $(call ld-option, -X,)
endif
+# insure the checker run with the right endianness
+CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
+
# Default kernel image to build when no specific target is given.
# KBUILD_IMAGE may be overruled on the command line or
# set in the environment
diff --git a/arch/openrisc/Makefile b/arch/openrisc/Makefile
index cf88029628643..89076a66eee26 100644
--- a/arch/openrisc/Makefile
+++ b/arch/openrisc/Makefile
@@ -25,7 +25,6 @@ LDFLAGS_vmlinux :=
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
KBUILD_CFLAGS += -pipe -ffixed-r10 -D__linux__
-CHECKFLAGS += -mbig-endian
ifeq ($(CONFIG_OPENRISC_HAVE_INST_MUL),y)
KBUILD_CFLAGS += $(call cc-option,-mhard-mul)
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 34ac503e28add..348ae4779f327 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -22,7 +22,7 @@ KBUILD_IMAGE := vmlinuz
KBUILD_DEFCONFIG := default_defconfig
NM = sh $(srctree)/arch/parisc/nm
-CHECKFLAGS += -D__hppa__=1 -mbig-endian
+CHECKFLAGS += -D__hppa__=1
LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
export LIBGCC
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index c79936d02f7bd..68a690442be05 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -18,7 +18,7 @@ KBUILD_CFLAGS += -m64
KBUILD_AFLAGS += -m64
UTS_MACHINE := s390x
STACK_SIZE := 16384
-CHECKFLAGS += -D__s390__ -D__s390x__ -mbig-endian
+CHECKFLAGS += -D__s390__ -D__s390x__
export LD_BFD
--
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