Hi Kishon, FYI, the error/warning still remains. tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.10.y head: 2c79f99170b96e20b59e6bc5363747564aee4898 commit: f765f578153d8bfc7a035b1fce2c09d2c41bd980 [1598/9999] PCI: keystone: Convert to using hierarchy domain for legacy interrupts config: arm64-randconfig-r021-20220120 (https://download.01.org/0day-ci/archive/20220121/202201211234.kHjYK0ub-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d4baf3b1322b84816aa623d8e8cb45a49cb68b84) 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 remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-rt-linux-5.10.y git checkout f765f578153d8bfc7a035b1fce2c09d2c41bd980 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/pci/controller/dwc/ 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 >>): void ks_pcie_irq_eoi(struct irq_data *data) ^ drivers/pci/controller/dwc/pci-keystone.c:299:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ks_pcie_irq_eoi(struct irq_data *data) ^ static void ks_pcie_irq_enable(struct irq_data *data) ^ drivers/pci/controller/dwc/pci-keystone.c:308:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ks_pcie_irq_enable(struct irq_data *data) ^ static void ks_pcie_irq_disable(struct irq_data *data) ^ drivers/pci/controller/dwc/pci-keystone.c:317:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ks_pcie_irq_disable(struct irq_data *data) ^ static 3 warnings generated. vim +/ks_pcie_irq_eoi +299 drivers/pci/controller/dwc/pci-keystone.c 298 300 { 301 struct keystone_pcie *ks_pcie = irq_data_get_irq_chip_data(data); 302 irq_hw_number_t hwirq = data->hwirq; 303 304 ks_pcie_app_writel(ks_pcie, IRQ_EOI, hwirq); 305 irq_chip_eoi_parent(data); 306 } 307 309 { 310 struct keystone_pcie *ks_pcie = irq_data_get_irq_chip_data(data); 311 irq_hw_number_t hwirq = data->hwirq; 312 313 ks_pcie_app_writel(ks_pcie, IRQ_ENABLE_SET(hwirq), INTx_EN); 314 irq_chip_enable_parent(data); 315 } 316 318 { 319 struct keystone_pcie *ks_pcie = irq_data_get_irq_chip_data(data); 320 irq_hw_number_t hwirq = data->hwirq; 321 322 ks_pcie_app_writel(ks_pcie, IRQ_ENABLE_CLR(hwirq), INTx_EN); 323 irq_chip_disable_parent(data); 324 } 325 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org