On 5/20/21 4:28 AM, Arnd Bergmann wrote:
On Wed, May 19, 2021 at 9:48 PM kernel test robot <lkp@xxxxxxxxx> wrote:
tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.10.y
head: 689e89aee55c565fe90fcdf8a7e53f2f976c5946
commit: 5f2f616343b1d62d26f24316fbfc107ecf0983a9 [3189/5262] linux/compiler-clang.h: define HAVE_BUILTIN_BSWAP*
config: mips-randconfig-r015-20210519 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8e93d10633d751a3e9169bf9fa68326925ffa097)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=5f2f616343b1d62d26f24316fbfc107ecf0983a9
git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git fetch --no-tags linux-stable-rc linux-5.10.y
git checkout 5f2f616343b1d62d26f24316fbfc107ecf0983a9
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
I analyzed another bug like this today, and I think this is again just
CONFIG_UBSAN_ALIGNMENT=y
on mips/clang causing tons of these warnings.
I don't think this should be considered a regression, but we may want
to change either the
kernel or the 0day bot from test building this combination of options.
Arnd
Hi Arnd,
We have disabled CONFIG_UBSAN_ALIGNMENT for mips/clang in our kconfigs
to avoid reporting such warnings again.
Best Regards,
Rong Chen
