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authorLuc Van Oostenryck <luc.vanoostenryck@gmail.com>2018-05-28 20:27:35 +0200
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-05-29 22:05:08 +0900
commit145167650b96967d6b726efef978c74831e6b2bd (patch)
treed44acd9ef948a6ac63f1b72194a4b1691478bac1
parent59f7b5847b0c279d416977d07b7d23aaa7fdc1be (diff)
downloadlinux-145167650b96967d6b726efef978c74831e6b2bd.tar.bz2
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>
-rw-r--r--Makefile3
-rw-r--r--arch/openrisc/Makefile1
-rw-r--r--arch/parisc/Makefile2
-rw-r--r--arch/s390/Makefile2
4 files changed, 5 insertions, 3 deletions
diff --git a/Makefile b/Makefile
index 1617ab517819..68982ba7bc2f 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 cf8802962864..89076a66eee2 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 34ac503e28ad..348ae4779f32 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 c79936d02f7b..68a690442be0 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