Hi Philip, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm-tip/drm-tip next-20211015] [cannot apply to linux/master linus/master v5.15-rc5] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Philip-Chen/drm-bridge-parade-ps... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: hexagon-buildonly-randconfig-r001-20211017 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 8ca4b3ef19fe82d7ad6a6e1515317dcc01b41515) 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://github.com/0day-ci/linux/commit/3224ea81dd1cf1d744bee07def5edb1e9... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Philip-Chen/drm-bridge-parade-ps8640-Enable-runtime-power-management/20211017-005837 git checkout 3224ea81dd1cf1d744bee07def5edb1e98c269a6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 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 >>, old ones prefixed by <<): ERROR: modpost: "__raw_readsl" [drivers/i3c/master/svc-i3c-master.ko] undefined! ERROR: modpost: "__raw_writesl" [drivers/i3c/master/dw-i3c-master.ko] undefined! ERROR: modpost: "__raw_readsl" [drivers/i3c/master/dw-i3c-master.ko] undefined! ERROR: modpost: "__raw_writesl" [drivers/i3c/master/i3c-master-cdns.ko] undefined! ERROR: modpost: "__raw_readsl" [drivers/i3c/master/i3c-master-cdns.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org