[openeuler:openEuler-1.0-LTS 1942/1942] drivers/iommu/arm-smmu-v3-context.c:569:5: warning: no previous prototype for 'arm_smmu_set_cd_mpam'

[openeuler:openEuler-1.0-LTS 1942/1942] drivers/iommu/arm-smmu-v3-context.c:569:5: warning: no previous prototype for 'arm_smmu_set_cd_mpam'

[kernel test robot]

Hi Xingang,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   5a399b91821faeec2466751db2d714b24f8eb17c
commit: 7c01a111ee8606b0c1986bb624808769d4236742 [1942/1942] iommu/arm-smmu-v3: Add support to configure mpam in STE/CD context
config: arm64-randconfig-002-20251213 (https://download.01.org/0day-ci/archive/20251214/202512140721.kLxdCMUB-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512140721.kLxdCMUB-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/202512140721.kLxdCMUB-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/iommu/arm-smmu-v3-context.c:569:5: warning: no previous prototype for 'arm_smmu_set_cd_mpam' [-Wmissing-prototypes]
     569 | int arm_smmu_set_cd_mpam(struct iommu_pasid_table_ops *ops,
         |     ^~~~~~~~~~~~~~~~~~~~
--
   drivers/iommu/arm-smmu-v3.c:4267:5: warning: no previous prototype for 'arm_smmu_set_dev_mpam' [-Wmissing-prototypes]
    4267 | int arm_smmu_set_dev_mpam(struct device *dev, int ssid, int partid, int pmg,
         |     ^~~~~~~~~~~~~~~~~~~~~
>> drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'dev' not described in 'arm_smmu_set_dev_mpam'
>> drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'ssid' not described in 'arm_smmu_set_dev_mpam'
   drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'partid' not described in 'arm_smmu_set_dev_mpam'
   drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 'pmg' not described in 'arm_smmu_set_dev_mpam'
>> drivers/iommu/arm-smmu-v3.c:4269: warning: Function parameter or member 's1mpam' not described in 'arm_smmu_set_dev_mpam'


vim +/arm_smmu_set_cd_mpam +569 drivers/iommu/arm-smmu-v3-context.c

   568	
 > 569	int arm_smmu_set_cd_mpam(struct iommu_pasid_table_ops *ops,
   570				 int ssid, int partid, int pmg)
   571	{
   572		struct arm_smmu_cd_tables *tbl = pasid_ops_to_tables(ops);
   573		u64 val;
   574		__le64 *cdptr = arm_smmu_get_cd_ptr(tbl, ssid);
   575	
   576		if (!cdptr)
   577			return -ENOMEM;
   578	
   579		val = le64_to_cpu(cdptr[5]);
   580		val &= ~CTXDESC_CD_5_PARTID_MASK;
   581		val |= FIELD_PREP(CTXDESC_CD_5_PARTID_MASK, partid);
   582		val &= ~CTXDESC_CD_5_PMG_MASK;
   583		val |= FIELD_PREP(CTXDESC_CD_5_PMG_MASK, pmg);
   584		WRITE_ONCE(cdptr[5], cpu_to_le64(val));
   585	
   586		iommu_pasid_flush(&tbl->pasid, ssid, true);
   587	
   588		return 0;
   589	}
   590	

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