Hi Han, FYI, the error/warning still remains. tree: https://github.com/Freescale/linux-fslc 5.4-2.1.x-imx head: dc9c8a20afa50de2da8773bbabb71464c4ee9a9d commit: 2c4cf9ce2fcf9581d6625025b76ae73f77dde922 [8321/18134] MLK-23644: spi: spi-nxp-fspi: enable runtime pm for fspi config: x86_64-randconfig-a012-20210514 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e475d4d69f04597c3f6c34c8ff1899bf44502a94) 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://github.com/Freescale/linux-fslc/commit/2c4cf9ce2fcf9581d6625025b7... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc 5.4-2.1.x-imx git checkout 2c4cf9ce2fcf9581d6625025b76ae73f77dde922 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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 >>): .pm = &nxp_fspi_pm_ops, ^~~~~~~~~~~~~~~ nxp_fspi_mem_ops drivers/spi/spi-nxp-fspi.c:997:44: note: 'nxp_fspi_mem_ops' declared here static const struct spi_controller_mem_ops nxp_fspi_mem_ops = { ^ .pm = &nxp_fspi_pm_ops, ^~~~~~~~~~~~~~~~ 2 errors generated. vim +1193 drivers/spi/spi-nxp-fspi.c a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1188 a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1189 static struct platform_driver nxp_fspi_driver = { a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1190 .driver = { a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1191 .name = "nxp-fspi", a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1192 .of_match_table = nxp_fspi_dt_ids, a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 @1193 .pm = &nxp_fspi_pm_ops, a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1194 }, a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1195 .probe = nxp_fspi_probe, a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1196 .remove = nxp_fspi_remove, a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1197 }; a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1198 module_platform_driver(nxp_fspi_driver); a5356aef6a907c Yogesh Narayan Gaur 2019-01-15 1199 :::::: The code at line 1193 was first introduced by commit :::::: a5356aef6a907c2e2aed0caaa2b88b6021394471 spi: spi-mem: Add driver for NXP FlexSPI controller :::::: TO: Yogesh Narayan Gaur <yogeshnarayan.gaur(a)nxp.com&gt; :::::: CC: Mark Brown <broonie(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org