Hi Hans, kernel test robot noticed the following build errors: [auto build test ERROR on a1cffe8cc8aef85f1b07c4464f0998b9785b795a] url: https://github.com/intel-lab-lkp/linux/commits/Hans-Zhang/PCI-Introduce-generic-capability-search-functions/20250324-005300 base: a1cffe8cc8aef85f1b07c4464f0998b9785b795a patch link: https://lore.kernel.org/r/20250323164852.430546-4-18255117159%40163.com patch subject: [v6 3/5] PCI: cadence: Use common PCI host bridge APIs for finding the capabilities config: riscv-randconfig-001-20250324 (https://download.01.org/0day-ci/archive/20250324/202503240338.N37HXlm9-lkp@xxxxxxxxx/config) compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project c2692afc0a92cd5da140dfcdfff7818a5b8ce997) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250324/202503240338.N37HXlm9-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202503240338.N37HXlm9-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): drivers/pci/controller/cadence/pcie-cadence.c:20:11: warning: variable 'val' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 20 | else if (size == 1) | ^~~~~~~~~ drivers/pci/controller/cadence/pcie-cadence.c:23:9: note: uninitialized use occurs here 23 | return val; | ^~~ drivers/pci/controller/cadence/pcie-cadence.c:20:7: note: remove the 'if' if its condition is always true 20 | else if (size == 1) | ^~~~~~~~~~~~~~ 21 | val = readb(pcie->reg_base + where); drivers/pci/controller/cadence/pcie-cadence.c:14:9: note: initialize the variable 'val' to silence this warning 14 | u32 val; | ^ | = 0 >> drivers/pci/controller/cadence/pcie-cadence.c:28:9: error: call to undeclared function 'pci_host_bridge_find_capability'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 28 | return pci_host_bridge_find_capability(pcie, cdns_pcie_read_cfg, cap); | ^ >> drivers/pci/controller/cadence/pcie-cadence.c:33:9: error: call to undeclared function 'pci_host_bridge_find_ext_capability'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 33 | return pci_host_bridge_find_ext_capability(pcie, cdns_pcie_read_cfg, cap); | ^ drivers/pci/controller/cadence/pcie-cadence.c:33:9: note: did you mean 'cdns_pcie_find_ext_capability'? drivers/pci/controller/cadence/pcie-cadence.c:31:5: note: 'cdns_pcie_find_ext_capability' declared here 31 | u16 cdns_pcie_find_ext_capability(struct cdns_pcie *pcie, u8 cap) | ^ 32 | { 33 | return pci_host_bridge_find_ext_capability(pcie, cdns_pcie_read_cfg, cap); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | cdns_pcie_find_ext_capability 1 warning and 2 errors generated. vim +/pci_host_bridge_find_capability +28 drivers/pci/controller/cadence/pcie-cadence.c 25 26 u8 cdns_pcie_find_capability(struct cdns_pcie *pcie, u8 cap) 27 { > 28 return pci_host_bridge_find_capability(pcie, cdns_pcie_read_cfg, cap); 29 } 30 31 u16 cdns_pcie_find_ext_capability(struct cdns_pcie *pcie, u8 cap) 32 { > 33 return pci_host_bridge_find_ext_capability(pcie, cdns_pcie_read_cfg, cap); 34 } 35 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
