tree: https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git f33 head: 4f10135921cffa0409227df23fdf47179f55651d commit: d25f30e2f0c67f058d0eb74341aa02fb36848cac [33/38] PCI: Add MCFG quirks for Tegra194 host controllers config: arm64-randconfig-r034-20210112 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git/commit... git remote add jwboyer-fedora https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git git fetch --no-tags jwboyer-fedora f33 git checkout d25f30e2f0c67f058d0eb74341aa02fb36848cac # 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 warnings (new ones prefixed by >>): static const unsigned int pcie_gen_freq[] = { ^ drivers/pci/controller/dwc/pcie-tegra194.c:250:18: warning: unused variable 'event_cntr_ctrl_offset' [-Wunused-const-variable] static const u32 event_cntr_ctrl_offset[] = { ^ drivers/pci/controller/dwc/pcie-tegra194.c:259:18: warning: unused variable 'event_cntr_data_offset' [-Wunused-const-variable] static const u32 event_cntr_data_offset[] = { ^ 3 warnings generated. vim +/pcie_gen_freq +243 drivers/pci/controller/dwc/pcie-tegra194.c c57247f940e8ea13 Vidya Sagar 2020-03-03 242 56e15a238d92788a Vidya Sagar 2019-08-13 @243 static const unsigned int pcie_gen_freq[] = { 56e15a238d92788a Vidya Sagar 2019-08-13 244 GEN1_CORE_CLK_FREQ, 56e15a238d92788a Vidya Sagar 2019-08-13 245 GEN2_CORE_CLK_FREQ, 56e15a238d92788a Vidya Sagar 2019-08-13 246 GEN3_CORE_CLK_FREQ, 56e15a238d92788a Vidya Sagar 2019-08-13 247 GEN4_CORE_CLK_FREQ 56e15a238d92788a Vidya Sagar 2019-08-13 248 }; 56e15a238d92788a Vidya Sagar 2019-08-13 249 :::::: The code at line 243 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