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kbuild: add machine size to CHECKFLAGS

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By default, sparse assumes a 64bit machine when compiled on x86-64
and 32bit when compiled on anything else.

This can of course create all sort of problems for the other archs, like
issuing false warnings ('shift too big (32) for type unsigned long'), or
worse, failing to emit legitimate warnings.

Fix this by adding the -m32/-m64 flag, depending on CONFIG_64BIT,
to CHECKFLAGS in the main Makefile (and so for all archs).
Also, remove the now unneeded -m32/-m64 in arch specific Makefiles.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Luc Van Oostenryck 2018-05-30 22:48:38 +02:00 committed by Masahiro Yamada
parent 145167650b
commit 1f2f01b122
9 changed files with 10 additions and 10 deletions
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3
Makefile
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@ -877,6 +877,9 @@ endif
# insure the checker run with the right endianness
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
# the checker needs the correct machine size
CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
# 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

2
arch/alpha/Makefile
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@ -11,7 +11,7 @@
NM := $(NM) -B
LDFLAGS_vmlinux := -static -N #-relax
CHECKFLAGS += -D__alpha__ -m64
CHECKFLAGS += -D__alpha__
cflags-y := -pipe -mno-fp-regs -ffixed-8
cflags-y += $(call cc-option, -fno-jump-tables)

2
arch/arm/Makefile
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@ -135,7 +135,7 @@ endif
KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
CHECKFLAGS += -D__arm__ -m32
CHECKFLAGS += -D__arm__
#Default value
head-y := arch/arm/kernel/head$(MMUEXT).o

2
arch/arm64/Makefile
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@ -78,7 +78,7 @@ LDFLAGS += -maarch64linux
UTS_MACHINE := aarch64
endif
CHECKFLAGS += -D__aarch64__ -m64
CHECKFLAGS += -D__aarch64__
ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds

2
arch/ia64/Makefile
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@ -18,7 +18,7 @@ READELF := $(CROSS_COMPILE)readelf
export AWK
CHECKFLAGS += -m64 -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__
CHECKFLAGS += -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__
OBJCOPYFLAGS := --strip-all
LDFLAGS_vmlinux := -static

3
arch/mips/Makefile
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@ -309,9 +309,6 @@ ifdef CONFIG_MIPS
CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
ifdef CONFIG_64BIT
CHECKFLAGS += -m64
endif
endif
OBJCOPYFLAGS += --remove-section=.reginfo

2
arch/parisc/Makefile
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@ -28,7 +28,7 @@ export LIBGCC
ifdef CONFIG_64BIT
UTS_MACHINE := parisc64
CHECKFLAGS += -D__LP64__=1 -m64
CHECKFLAGS += -D__LP64__=1
CC_ARCHES = hppa64
LD_BFD := elf64-hppa-linux
else # 32-bit

2
arch/sparc/Makefile
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@ -39,7 +39,7 @@ else
# sparc64
#
CHECKFLAGS += -D__sparc__ -D__sparc_v9__ -D__arch64__ -m64
CHECKFLAGS += -D__sparc__ -D__sparc_v9__ -D__arch64__
LDFLAGS := -m elf64_sparc
export BITS := 64
UTS_MACHINE := sparc64

2
arch/x86/Makefile
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@ -94,7 +94,7 @@ ifeq ($(CONFIG_X86_32),y)
else
BITS := 64
UTS_MACHINE := x86_64
CHECKFLAGS += -D__x86_64__ -m64
CHECKFLAGS += -D__x86_64__
biarch := -m64
KBUILD_AFLAGS += -m64