Hi Alim, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 1e28eed17697bcf343c6743f0028cc3b5dd88bf0 commit: d31503fe395d1d7e17b85eb7b291cc1a4bff2671 scsi: ufs: Allow exynos ufs driver to build as module date: 9 months ago config: x86_64-randconfig-a002-20210316 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a28facba1ccdc957f386b7753f4958307f1bfde8) 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 d31503fe395d1d7e17b85eb7b291cc1a4bff2671 # 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 warnings (new ones prefixed by >>): static const struct of_device_id exynos_ufs_of_match[] = { ^ 1 warning generated. vim +/exynos_ufs_of_match +1268 drivers/scsi/ufs/ufs-exynos.c 55f4b1f73631a0 Alim Akhtar 2020-05-28 1267 55f4b1f73631a0 Alim Akhtar 2020-05-28 @1268 static const struct of_device_id exynos_ufs_of_match[] = { 55f4b1f73631a0 Alim Akhtar 2020-05-28 1269 { .compatible = "samsung,exynos7-ufs", 55f4b1f73631a0 Alim Akhtar 2020-05-28 1270 .data = &exynos_ufs_drvs }, 55f4b1f73631a0 Alim Akhtar 2020-05-28 1271 {}, 55f4b1f73631a0 Alim Akhtar 2020-05-28 1272 }; 55f4b1f73631a0 Alim Akhtar 2020-05-28 1273 :::::: The code at line 1268 was first introduced by commit :::::: 55f4b1f73631a0817717fe6e98517de51b4c3527 scsi: ufs: ufs-exynos: Add UFS host support for Exynos SoCs :::::: TO: Alim Akhtar <alim.akhtar(a)samsung.com&gt; :::::: CC: Martin K. Petersen <martin.petersen(a)oracle.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org