diff options
| author | Thomas Weißschuh <thomas.weissschuh@linutronix.de> | 2026-03-02 08:58:37 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-03-11 10:15:42 +0100 |
| commit | 56f85f67b3e20b105fa23bf97bfc8b6d5cdbbef0 (patch) | |
| tree | c89892e3ae3df05314a83b2368a69fd44784b7ee /arch/x86/entry | |
| parent | a5ccec8fd10efa50a3fd4444915a2abff31f2535 (diff) | |
x86/vdso: Use 32-bit CHECKFLAGS for compat vDSO
When building the compat vDSO the CHECKFLAGS from the 64-bit kernel
are used. These are combined with the 32-bit CFLAGS. This confuses
sparse, producing false-positive warnings or potentially missing
real issues.
Manually override the CHECKFLAGS for the compat vDSO with the correct
32-bit configuration.
Reported-by: Sun Jian <sun.jian.kdev@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260302-vdso-compat-checkflags-v2-1-78e55baa58ba@linutronix.de
Closes: https://lore.kernel.org/lkml/20260114084529.1676356-1-sun.jian.kdev@gmail.com/
Closes: https://lore.kernel.org/lkml/20260117215542.342638347@kernel.org/
Closes: https://lore.kernel.org/r/202602111941.PIhubgrb-lkp@intel.com/
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/vdso/vdso32/Makefile | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/entry/vdso/vdso32/Makefile b/arch/x86/entry/vdso/vdso32/Makefile index add6afb484ba..ded4fc6a48cd 100644 --- a/arch/x86/entry/vdso/vdso32/Makefile +++ b/arch/x86/entry/vdso/vdso32/Makefile @@ -15,6 +15,10 @@ flags-y := -DBUILD_VDSO32 -m32 -mregparm=0 flags-$(CONFIG_X86_64) += -include $(src)/fake_32bit_build.h flags-remove-y := -m64 +# Checker flags +CHECKFLAGS := $(subst -m64,-m32,$(CHECKFLAGS)) +CHECKFLAGS := $(subst -D__x86_64__,-D__i386__,$(CHECKFLAGS)) + # The location of this include matters! include $(src)/../common/Makefile.include |