tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/kcsan head: 4fe9d6c2ef85257d80291086e4514eaaebd3504e commit: f5bc7f69b328f00a6accd9a11f5981d2d0c11cb5 [11/13] kcsan: remove atomic builtin support config: x86_64-randconfig-a011-20210929 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id=f5bc7f69b328f00a6accd9a11f5981d2d0c11cb5 git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git git fetch --no-tags mark arm64/kcsan git checkout f5bc7f69b328f00a6accd9a11f5981d2d0c11cb5 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: __tsan_atomic64_fetch_add >>> referenced by initcall.h:10 (include/trace/events/initcall.h:10) >>> main.o:(__traceiter_initcall_level) in archive init/built-in.a >>> referenced by initcall.h:10 (include/trace/events/initcall.h:10) >>> main.o:(__traceiter_initcall_level) in archive init/built-in.a >>> referenced by initcall.h:10 (include/trace/events/initcall.h:10) >>> main.o:(__traceiter_initcall_level) in archive init/built-in.a >>> referenced 744943 more times --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org