From 145167650b96967d6b726efef978c74831e6b2bd Mon Sep 17 00:00:00 2001 From: Luc Van Oostenryck 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 Signed-off-by: Masahiro Yamada --- 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 1617ab5..68982ba 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 cf88029..89076a6 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 34ac503..348ae47 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 c79936d..68a6904 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 -- 2.7.4