[driver-core:virtual_bus_2 2/2] drivers/regulator/dummy.c:59:27: sparse: sparse: symbol 'dummy_regulator_driver' was not declared. Should it be static?

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git virtual_bus_2
head:   bdb2f3a52db4cbbb7bf900190e7a964ea116d44c
commit: bdb2f3a52db4cbbb7bf900190e7a964ea116d44c [2/2] regulator: dummy: convert to use the virtual bus
config: nios2-randconfig-r113-20250205 (https://download.01.org/0day-ci/archive/20250205/202502051136.oWGOGsbe-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250205/202502051136.oWGOGsbe-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/202502051136.oWGOGsbe-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/regulator/dummy.c:59:27: sparse: sparse: symbol 'dummy_regulator_driver' was not declared. Should it be static?

vim +/dummy_regulator_driver +59 drivers/regulator/dummy.c

    58	
  > 59	struct virtual_driver_ops dummy_regulator_driver = {
    60		.probe		= dummy_regulator_probe,
    61	};
    62	

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