[openeuler:OLK-6.6 3075/3075] drivers/ub/ubus/ubus_driver.c:64:27: warning: no previous prototype for function 'ub_find_bus_controller'

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

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   6a5b2f9a14178b13fe5efc52ba6575f5294c1270
commit: 26a640c9d1b1f7764bd933b7bf6ffca8ddbc6efd [3075/3075] ub:ubus: add ubus controller framework
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20251031/202510312355.LNPDosJ5-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251031/202510312355.LNPDosJ5-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/202510312355.LNPDosJ5-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/ub/ubus/ubus_driver.c:64:27: warning: no previous prototype for function 'ub_find_bus_controller' [-Wmissing-prototypes]
      64 | struct ub_bus_controller *ub_find_bus_controller(u32 ctl_no)
         |                           ^
   drivers/ub/ubus/ubus_driver.c:64:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      64 | struct ub_bus_controller *ub_find_bus_controller(u32 ctl_no)
         | ^
         | static 
   drivers/ub/ubus/ubus_driver.c:154:28: warning: no previous prototype for function 'ub_match_id' [-Wmissing-prototypes]
     154 | const struct ub_device_id *ub_match_id(const struct ub_device_id *ids,
         |                            ^
   drivers/ub/ubus/ubus_driver.c:154:7: note: declare 'static' if the function is not intended to be used outside of this translation unit
     154 | const struct ub_device_id *ub_match_id(const struct ub_device_id *ids,
         |       ^
         | static 
   drivers/ub/ubus/ubus_driver.c:484:6: warning: no previous prototype for function 'ub_bus_type_init' [-Wmissing-prototypes]
     484 | void ub_bus_type_init(void)
         |      ^
   drivers/ub/ubus/ubus_driver.c:484:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     484 | void ub_bus_type_init(void)
         | ^
         | static 
   drivers/ub/ubus/ubus_driver.c:496:6: warning: no previous prototype for function 'ub_bus_type_uninit' [-Wmissing-prototypes]
     496 | void ub_bus_type_uninit(void)
         |      ^
   drivers/ub/ubus/ubus_driver.c:496:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     496 | void ub_bus_type_uninit(void)
         | ^
         | static 
   4 warnings generated.


vim +/ub_find_bus_controller +64 drivers/ub/ubus/ubus_driver.c

    63	
  > 64	struct ub_bus_controller *ub_find_bus_controller(u32 ctl_no)
    65	{
    66		struct ub_bus_controller *ubc;
    67	
    68		list_for_each_entry(ubc, &ubc_list, node)
    69			if (ubc->ctl_no == ctl_no)
    70				return ubc;
    71	
    72		return NULL;
    73	}
    74	EXPORT_SYMBOL_GPL(ub_find_bus_controller);
    75	

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