Re: [RFC PATCH v2 06/10] iommu: Add a helper to check for user ownership

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

Hi Pranjal,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on arm-perf/for-next/perf]
[also build test WARNING on linus/master v6.15-rc2 next-20250417]
[cannot apply to joro-iommu/next]
[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/Pranjal-Shrivastava/iommu-arm-smmu-v3-Refactor-arm_smmu_setup_irqs/20250419-073729
base:   https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git for-next/perf
patch link:    https://lore.kernel.org/r/20250418233409.3926715-7-praan%40google.com
patch subject: [RFC PATCH v2 06/10] iommu: Add a helper to check for user ownership
config: csky-randconfig-002-20250419 (https://download.01.org/0day-ci/archive/20250419/202504192106.ned5rxJr-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250419/202504192106.ned5rxJr-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/202504192106.ned5rxJr-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/iommu/iommu.c:3355: warning: expecting prototype for iommu_group_dma_owner_kernel(). Prototype was for iommu_group_dma_owner_user() instead


vim +3355 drivers/iommu/iommu.c

  3346	
  3347	/**
  3348	 * iommu_group_dma_owner_kernel() - Query if kernel owns the group dma
  3349	 * @group: The group.
  3350	 *
  3351	 * This provides status query on a given group. It is racy and only for
  3352	 * non-binding status reporting.
  3353	 */
  3354	bool iommu_group_dma_owner_user(struct iommu_group *group)
> 3355	{
  3356		void *user;
  3357	
  3358		mutex_lock(&group->mutex);
  3359		user = group->owner;
  3360		mutex_unlock(&group->mutex);
  3361	
  3362		return user ? true : false;
  3363	}
  3364	EXPORT_SYMBOL_GPL(iommu_group_dma_owner_user);
  3365	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki