[kbuild-all] ld.lld: error: undefined symbol: devm_mux_control_get

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 09162bc32c880a791c6c0668ce0745cf7958f576 commit: abf00907538e21c469a10809dc2991982673fcbf spi: dw: Add Baikal-T1 SPI Controller glue driver date: 6 weeks ago config: x86_64-randconfig-r014-20201116 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 9a85643cd357e412cff69067bb5c4840e228c2ab) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout abf00907538e21c469a10809dc2991982673fcbf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org