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
