Hi Xingang, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 5a399b91821faeec2466751db2d714b24f8eb17c commit: 2b7032bc021bef1eeca51dac8213fd3abce61dc4 [1942/1942] iommu/arm-smmu-v3: Add support to get SMMU mpam configuration config: arm64-randconfig-002-20251213 (https://download.01.org/0day-ci/archive/20251214/202512140917.x1FlS27Y-lkp@i...) compiler: aarch64-linux-gcc (GCC) 11.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512140917.x1FlS27Y-lkp@i...) 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/202512140917.x1FlS27Y-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-context.c:591:5: warning: no previous prototype for 'arm_smmu_get_cd_mpam' [-Wmissing-prototypes] 591 | int arm_smmu_get_cd_mpam(struct iommu_pasid_table_ops *ops, | ^~~~~~~~~~~~~~~~~~~~ -- drivers/iommu/arm-smmu-v3.c:4296:5: warning: no previous prototype for 'arm_smmu_set_dev_mpam' [-Wmissing-prototypes] 4296 | int arm_smmu_set_dev_mpam(struct device *dev, int ssid, int partid, int pmg, | ^~~~~~~~~~~~~~~~~~~~~ drivers/iommu/arm-smmu-v3.c:4338:5: warning: no previous prototype for 'arm_smmu_get_dev_mpam' [-Wmissing-prototypes] 4338 | int arm_smmu_get_dev_mpam(struct device *dev, int ssid, int *partid, int *pmg, | ^~~~~~~~~~~~~~~~~~~~~ drivers/iommu/arm-smmu-v3.c:4298: warning: Function parameter or member 'dev' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4298: warning: Function parameter or member 'ssid' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4298: warning: Function parameter or member 'partid' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4298: warning: Function parameter or member 'pmg' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4298: warning: Function parameter or member 's1mpam' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4340: warning: Function parameter or member 'ssid' not described in 'arm_smmu_get_dev_mpam' drivers/iommu/arm-smmu-v3.c:4340: warning: Function parameter or member 'partid' not described in 'arm_smmu_get_dev_mpam' drivers/iommu/arm-smmu-v3.c:4340: warning: Function parameter or member 'pmg' not described in 'arm_smmu_get_dev_mpam' drivers/iommu/arm-smmu-v3.c:4340: warning: Function parameter or member 's1mpam' not described in 'arm_smmu_get_dev_mpam'

vim +/arm_smmu_get_cd_mpam +591 drivers/iommu/arm-smmu-v3-context.c 590

591 int arm_smmu_get_cd_mpam(struct iommu_pasid_table_ops *ops, 592 int ssid, int *partid, int *pmg) 593 { 594 struct arm_smmu_cd_tables *tbl = pasid_ops_to_tables(ops); 595 u64 val; 596 __le64 *cdptr = arm_smmu_get_cd_ptr(tbl, ssid); 597 598 if (!cdptr) 599 return -ENOMEM; 600 601 val = le64_to_cpu(cdptr[5]); 602 *partid = FIELD_GET(CTXDESC_CD_5_PARTID_MASK, val); 603 *pmg = FIELD_GET(CTXDESC_CD_5_PMG_MASK, val); 604 605 return 0; 606 } 607

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