Re: [v5 1/4] PCI: Introduce generic capability search functions

[kernel test robot <lkp@intel.com>]

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/20250322-004312
base:   a1cffe8cc8aef85f1b07c4464f0998b9785b795a
patch link:    https://lore.kernel.org/r/20250321163803.391056-2-18255117159%40163.com
patch subject: [v5 1/4] PCI: Introduce generic capability search functions
config: arm-randconfig-001-20250322 (https://download.01.org/0day-ci/archive/20250322/202503220356.59PxEhDx-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250322/202503220356.59PxEhDx-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503220356.59PxEhDx-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/arm/mm/iomap.c:9:0:
   include/linux/pci.h:2025:1: error: expected identifier or '(' before '{' token
    { return 0; }
    ^
   include/linux/pci.h:2029:1: error: expected identifier or '(' before '{' token
    { return 0; }
    ^
   In file included from arch/arm/mm/iomap.c:9:0:
>> include/linux/pci.h:2023:1: warning: 'pci_host_bridge_find_capability' declared 'static' but never defined [-Wunused-function]
    pci_host_bridge_find_capability(void *priv, pci_host_bridge_read_cfg read_cfg,
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/pci.h:2027:1: warning: 'pci_host_bridge_find_ext_capability' declared 'static' but never defined [-Wunused-function]
    pci_host_bridge_find_ext_capability(void *priv,
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +2023 include/linux/pci.h

  2000	
  2001	static inline void pci_set_master(struct pci_dev *dev) { }
  2002	static inline void pci_clear_master(struct pci_dev *dev) { }
  2003	static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
  2004	static inline void pci_disable_device(struct pci_dev *dev) { }
  2005	static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
  2006	static inline int pci_assign_resource(struct pci_dev *dev, int i)
  2007	{ return -EBUSY; }
  2008	static inline int __must_check __pci_register_driver(struct pci_driver *drv,
  2009							     struct module *owner,
  2010							     const char *mod_name)
  2011	{ return 0; }
  2012	static inline int pci_register_driver(struct pci_driver *drv)
  2013	{ return 0; }
  2014	static inline void pci_unregister_driver(struct pci_driver *drv) { }
  2015	static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
  2016	{ return 0; }
  2017	static inline u8 pci_find_next_capability(struct pci_dev *dev, u8 post, int cap)
  2018	{ return 0; }
  2019	static inline u16 pci_find_ext_capability(struct pci_dev *dev, int cap)
  2020	{ return 0; }
  2021	typedef u32 (*pci_host_bridge_read_cfg)(void *priv, int where, int size);
  2022	static inline u8
> 2023	pci_host_bridge_find_capability(void *priv, pci_host_bridge_read_cfg read_cfg,
  2024					u8 cap);
> 2025	{ return 0; }
  2026	static inline u16
> 2027	pci_host_bridge_find_ext_capability(void *priv,
  2028					    pci_host_bridge_read_cfg read_cfg, u8 cap);
> 2029	{ return 0; }
  2030	static inline u64 pci_get_dsn(struct pci_dev *dev)
  2031	{ return 0; }
  2032	

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