Hi Bhaumik, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.8 next-20200810] [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/Bhaumik-Bhatt/Introduce-features... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git fc80c51fd4b23ec007e88d4c688f2cac1b8648e7 config: arm64-randconfig-r001-20200810 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 3a34228bff6fdf45b50cb57cf5fb85d659eeb672) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 <<): WARNING: modpost: missing MODULE_LICENSE() in drivers/bus/mhi/core/main.o WARNING: modpost: missing MODULE_LICENSE() in drivers/bus/mhi/core/pm.o WARNING: modpost: missing MODULE_LICENSE() in drivers/bus/mhi/core/boot.o ERROR: modpost: "mhi_state_str" [drivers/bus/mhi/core/boot.ko] undefined! ERROR: modpost: "to_mhi_pm_state_str" [drivers/bus/mhi/core/boot.ko] undefined! ERROR: modpost: "dev_state_tran_str" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_fw_load_handler" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_get_exec_env" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_ring_chan_db" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_ring_cmd_db" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "to_mhi_pm_state_str" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_ring_er_db" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_init_mmio" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_read_reg_field" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_write_reg_field" [drivers/bus/mhi/core/pm.ko] undefined! ERROR: modpost: "mhi_init_chan_ctxt" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_deinit_chan_ctxt" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "to_mhi_pm_state_str" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_pm_m3_transition" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_pm_m0_transition" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_queue_state_transition" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_pm_m1_transition" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_pm_sys_err_handler" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_state_str" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_ee_str" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_tryset_pm_state" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_alloc_device" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_bus_type" [drivers/bus/mhi/core/main.ko] undefined! ERROR: modpost: "mhi_reset_chan" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_prepare_channel" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_free_bhie_table" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_rddm_prepare" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_alloc_bhie_table" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_read_reg" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_unmap_single_no_bb" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_unmap_single_use_bb" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_map_single_no_bb" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_map_single_use_bb" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_ctrl_ev_task" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_ev_task" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_pm_st_worker" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_process_ctrl_ev_ring" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_process_data_event_ring" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_db_brstmode_disable" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_db_brstmode" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_write_reg_field" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_write_reg" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_read_reg_field" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_irq_handler" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_intvec_threaded_handler" [drivers/bus/mhi/core/init.ko] undefined! ERROR: modpost: "mhi_intvec_handler" [drivers/bus/mhi/core/init.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org