x86/include/asm/arch_hweight.h:49:15: error: invalid input size for constraint 'D'

Naresh Kamboju
2023-02-07T07:57:23Z

Following Build regressions warnings / errors noticed on Linux next-20230207.

Regressions found on x86_64:

- build/clang-15-lkftconfig-compat
- build/clang-nightly-lkftconfig
- build/clang-15-lkftconfig
- build/clang-15-lkftconfig-kcsan
- build/clang-lkftconfig

In file included from arch/x86/entry/vdso/vdso32/vgetcpu.c:2:
In file included from arch/x86/entry/vdso/vdso32/../vgetcpu.c:8:
In file included from include/linux/kernel.h:22:
In file included from include/linux/bitops.h:68:
In file included from arch/x86/include/asm/bitops.h:420:
arch/x86/include/asm/arch_hweight.h:49:15: error: invalid input size
for constraint 'D'
: REG_IN (w));
^
In file included from arch/x86/entry/vdso/vdso32/vgetcpu.c:2:
In file included from arch/x86/entry/vdso/vdso32/../vgetcpu.c:8:
In file included from include/linux/kernel.h:25:
In file included from include/linux/math.h:6:
arch/x86/include/asm/div64.h:85:34: error: invalid output size for
constraint '=a'
asm ("mulq %2; divq %3" : "=a" (q)
^
2 errors generated.

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

Following config diff found.
+ CONFIG_COMPAT_WARN_32BIT_FILESYSTEM_ACCESS=y

Build details link,
https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230207/testrun/14611359/suite/build/test/clang-lkftconfig/details/

# To install tuxmake on your system globally:
# sudo pip3 install -U tuxmake
#
# See https://docs.tuxmake.org/ for complete documentation.
# Original tuxmake command with fragments listed below.
tuxmake \
--runtime podman \
--target-arch x86_64 \
--toolchain clang-15 \
--kconfig defconfig \
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/lkft.config
\
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/lkft-crypto.config
\
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/distro-overrides.config
\
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/systemd.config
\
--kconfig-add https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/virtio.config
\
--kconfig-add CONFIG_IGB=y \
--kconfig-add CONFIG_UNWINDER_FRAME_POINTER=y LLVM=1 LLVM_IAS=1

--
Linaro LKFT