Hi MeiChia, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvalo-wireless-drivers-next/master] [also build test ERROR on kvalo-wireless-drivers/master v5.16-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/MeiChia-Chiu/mt76-mt7915-add-mu-... base: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-ne... master config: mips-allmodconfig (https://download.01.org/0day-ci/archive/20211213/202112132138.0tsPYnSZ-lk...) compiler: mips-linux-gcc (GCC) 11.2.0 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/91cb277e37dbed42e6b6aee256694204b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review MeiChia-Chiu/mt76-mt7915-add-mu-mimo-and-ofdma-debugfs-knobs/20211213-140356 git checkout 91cb277e37dbed42e6b6aee256694204ba8d9a7f # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash 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: missing MODULE_LICENSE() in drivers/pci/controller/pcie-mt7621.o ERROR: modpost: "mips_cm_unlock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined! ERROR: modpost: "mips_cpc_base" [drivers/pci/controller/pcie-mt7621.ko] undefined! ERROR: modpost: "mips_cm_lock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined! ERROR: modpost: "mips_cm_is64" [drivers/pci/controller/pcie-mt7621.ko] undefined! ERROR: modpost: "mips_gcr_base" [drivers/pci/controller/pcie-mt7621.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org