Re: [PATCH 2/2] iommufd/selftest: Use normal IOMMU registration

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

Hi Robin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on next-20231128]
[cannot apply to joro-iommu/next v6.7-rc3 v6.7-rc2 v6.7-rc1 linus/master v6.7-rc4]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Robin-Murphy/iommufd-selftest-Use-a-fwnode-to-distinguish-devices/20231128-185058
base:   next-20231128
patch link:    https://lore.kernel.org/r/44ee6854da69e86b208f49752f60a4c18205c32a.1701165201.git.robin.murphy%40arm.com
patch subject: [PATCH 2/2] iommufd/selftest: Use normal IOMMU registration
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20231206/202312061821.knvqS2Hz-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231206/202312061821.knvqS2Hz-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/202312061821.knvqS2Hz-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/iommu/iommufd/selftest.c:1323:12: warning: no previous prototype for function 'iommufd_bus_init' [-Wmissing-prototypes]
   int __init iommufd_bus_init(void)
              ^
   drivers/iommu/iommufd/selftest.c:1323:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __init iommufd_bus_init(void)
   ^
   static 
   drivers/iommu/iommufd/selftest.c:515:1: warning: unused function 'get_md_pagetable_nested' [-Wunused-function]
   get_md_pagetable_nested(struct iommufd_ucmd *ucmd, u32 mockpt_id,
   ^
   2 warnings generated.


vim +/iommufd_bus_init +1323 drivers/iommu/iommufd/selftest.c

  1322	
> 1323	int __init iommufd_bus_init(void)
  1324	{
  1325		return bus_register(&iommufd_mock_bus_type);
  1326	}
  1327	subsys_initcall(iommufd_bus_init);
  1328	

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