Hi Hans, kernel test robot noticed the following build warnings: [auto build test WARNING on a1cffe8cc8aef85f1b07c4464f0998b9785b795a] url: https://github.com/intel-lab-lkp/linux/commits/Hans-Zhang/PCI-Introduce-generic-capability-search-functions/20250321-120748 base: a1cffe8cc8aef85f1b07c4464f0998b9785b795a patch link: https://lore.kernel.org/r/20250321040358.360755-2-18255117159%40163.com patch subject: [v3 1/4] PCI: Introduce generic capability search functions config: arm-randconfig-004-20250321 (https://download.01.org/0day-ci/archive/20250321/202503211730.XKhqW2Mw-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/20250321/202503211730.XKhqW2Mw-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/202503211730.XKhqW2Mw-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/arm/mm/iomap.c:9: >> include/linux/pci.h:2021:4: warning: no previous prototype for function 'pci_generic_find_capability' [-Wmissing-prototypes] 2021 | u8 pci_generic_find_capability(void *priv, pci_generic_read_cfg read_cfg, | ^ include/linux/pci.h:2021:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2021 | u8 pci_generic_find_capability(void *priv, pci_generic_read_cfg read_cfg, | ^ | static >> include/linux/pci.h:2024:5: warning: no previous prototype for function 'pci_generic_find_ext_capability' [-Wmissing-prototypes] 2024 | u16 pci_generic_find_ext_capability(void *priv, pci_generic_read_cfg read_cfg, | ^ include/linux/pci.h:2024:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2024 | u16 pci_generic_find_ext_capability(void *priv, pci_generic_read_cfg read_cfg, | ^ | static 2 warnings generated. vim +/pci_generic_find_capability +2021 include/linux/pci.h 1999 2000 static inline void pci_set_master(struct pci_dev *dev) { } 2001 static inline void pci_clear_master(struct pci_dev *dev) { } 2002 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; } 2003 static inline void pci_disable_device(struct pci_dev *dev) { } 2004 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; } 2005 static inline int pci_assign_resource(struct pci_dev *dev, int i) 2006 { return -EBUSY; } 2007 static inline int __must_check __pci_register_driver(struct pci_driver *drv, 2008 struct module *owner, 2009 const char *mod_name) 2010 { return 0; } 2011 static inline int pci_register_driver(struct pci_driver *drv) 2012 { return 0; } 2013 static inline void pci_unregister_driver(struct pci_driver *drv) { } 2014 static inline u8 pci_find_capability(struct pci_dev *dev, int cap) 2015 { return 0; } 2016 static inline u8 pci_find_next_capability(struct pci_dev *dev, u8 post, int cap) 2017 { return 0; } 2018 static inline u16 pci_find_ext_capability(struct pci_dev *dev, int cap) 2019 { return 0; } 2020 typedef u32 (*pci_generic_read_cfg)(void *priv, int where, int size); > 2021 u8 pci_generic_find_capability(void *priv, pci_generic_read_cfg read_cfg, 2022 u8 cap) 2023 { return 0; } > 2024 u16 pci_generic_find_ext_capability(void *priv, pci_generic_read_cfg read_cfg, 2025 u8 cap) 2026 { return 0; } 2027 static inline u64 pci_get_dsn(struct pci_dev *dev) 2028 { return 0; } 2029 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
