tree: https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git f30 head: 2a9c1e3b6c53a78a96a7fd9599f95172fb9e9ac9 commit: f7ea225a780c6e71cacb1cb4b9ea5da7cd2dd96f [35/98] PCI: Add MCFG quirks for Tegra194 host controllers config: arm64-randconfig-r026-20200521 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b) 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 git checkout f7ea225a780c6e71cacb1cb4b9ea5da7cd2dd96f # 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: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): static const unsigned int pcie_gen_freq[] = { ^ drivers/pci/controller/dwc/pcie-tegra194.c:235:18: warning: unused variable 'event_cntr_ctrl_offset' [-Wunused-const-variable] static const u32 event_cntr_ctrl_offset[] = { ^ drivers/pci/controller/dwc/pcie-tegra194.c:244:18: warning: unused variable 'event_cntr_data_offset' [-Wunused-const-variable] static const u32 event_cntr_data_offset[] = { ^ 3 warnings generated. vim +/pcie_gen_freq +228 drivers/pci/controller/dwc/pcie-tegra194.c 56e15a238d9278 Vidya Sagar 2019-08-13 227 56e15a238d9278 Vidya Sagar 2019-08-13 @228 static const unsigned int pcie_gen_freq[] = { 56e15a238d9278 Vidya Sagar 2019-08-13 229 GEN1_CORE_CLK_FREQ, 56e15a238d9278 Vidya Sagar 2019-08-13 230 GEN2_CORE_CLK_FREQ, 56e15a238d9278 Vidya Sagar 2019-08-13 231 GEN3_CORE_CLK_FREQ, 56e15a238d9278 Vidya Sagar 2019-08-13 232 GEN4_CORE_CLK_FREQ 56e15a238d9278 Vidya Sagar 2019-08-13 233 }; 56e15a238d9278 Vidya Sagar 2019-08-13 234 :::::: The code at line 228 was first introduced by commit :::::: 56e15a238d92788a2d09e0c5c26a5de1b3156931 PCI: tegra: Add Tegra194 PCIe support :::::: TO: Vidya Sagar <vidyas(a)nvidia.com&gt; :::::: CC: Lorenzo Pieralisi <lorenzo.pieralisi(a)arm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org