Hi Xingang, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 5a399b91821faeec2466751db2d714b24f8eb17c commit: 129938f5dfc8b2d8aaaeda0c565d57076bf5c1cc [1942/1942] iommu/arm-smmu-v3: Add support to enable/disable SMMU user_mpam_en config: arm64-randconfig-002-20251213 (https://download.01.org/0day-ci/archive/20251214/202512141348.7mzFhAqc-lkp@i...) compiler: aarch64-linux-gcc (GCC) 11.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512141348.7mzFhAqc-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/202512141348.7mzFhAqc-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/iommu/arm-smmu-v3.c:4299:5: warning: no previous prototype for 'arm_smmu_set_dev_mpam' [-Wmissing-prototypes] 4299 | int arm_smmu_set_dev_mpam(struct device *dev, int ssid, int partid, int pmg, | ^~~~~~~~~~~~~~~~~~~~~ drivers/iommu/arm-smmu-v3.c:4341:5: warning: no previous prototype for 'arm_smmu_get_dev_mpam' [-Wmissing-prototypes] 4341 | int arm_smmu_get_dev_mpam(struct device *dev, int ssid, int *partid, int *pmg, | ^~~~~~~~~~~~~~~~~~~~~ drivers/iommu/arm-smmu-v3.c:4355:5: warning: no previous prototype for 'arm_smmu_set_dev_user_mpam_en' [-Wmissing-prototypes] 4355 | int arm_smmu_set_dev_user_mpam_en(struct device *dev, int user_mpam_en) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

...

drivers/iommu/arm-smmu-v3.c:4373:5: warning: no previous prototype for 'arm_smmu_get_dev_user_mpam_en' [-Wmissing-prototypes] 4373 | int arm_smmu_get_dev_user_mpam_en(struct device *dev, int *user_mpam_en) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/iommu/arm-smmu-v3.c:4301: warning: Function parameter or member 'dev' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4301: warning: Function parameter or member 'ssid' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4301: warning: Function parameter or member 'partid' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4301: warning: Function parameter or member 'pmg' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4301: warning: Function parameter or member 's1mpam' not described in 'arm_smmu_set_dev_mpam' drivers/iommu/arm-smmu-v3.c:4343: warning: Function parameter or member 'ssid' not described in 'arm_smmu_get_dev_mpam' drivers/iommu/arm-smmu-v3.c:4343: warning: Function parameter or member 'partid' not described in 'arm_smmu_get_dev_mpam' drivers/iommu/arm-smmu-v3.c:4343: warning: Function parameter or member 'pmg' not described in 'arm_smmu_get_dev_mpam' drivers/iommu/arm-smmu-v3.c:4343: warning: Function parameter or member 's1mpam' not described in 'arm_smmu_get_dev_mpam' drivers/iommu/arm-smmu-v3.c:4356: warning: Function parameter or member 'dev' not described in 'arm_smmu_set_dev_user_mpam_en' drivers/iommu/arm-smmu-v3.c:4356: warning: Function parameter or member 'user_mpam_en' not described in 'arm_smmu_set_dev_user_mpam_en' drivers/iommu/arm-smmu-v3.c:4374: warning: Function parameter or member 'dev' not described in 'arm_smmu_get_dev_user_mpam_en' drivers/iommu/arm-smmu-v3.c:4374: warning: Function parameter or member 'user_mpam_en' not described in 'arm_smmu_get_dev_user_mpam_en'

vim +/arm_smmu_get_dev_user_mpam_en +4373 drivers/iommu/arm-smmu-v3.c 4369 4370 /** 4371 * arm_smmu_get_dev_user_mpam_en() - get user_mpam_en from smmu user cfg0 4372 */

4373 int arm_smmu_get_dev_user_mpam_en(struct device *dev, int *user_mpam_en) 4374 { 4375 struct arm_smmu_master_data *master = dev->iommu_fwspec->iommu_priv; 4376 struct arm_smmu_device *smmu = master->domain->smmu; 4377 u32 reg, __iomem *cfg = smmu->base + ARM_SMMU_USER_CFG0; 4378 4379 reg = readl_relaxed(cfg); 4380 *user_mpam_en = FIELD_GET(ARM_SMMU_USER_MPAM_EN, reg); 4381 4382 return 0; 4383 } 4384 EXPORT_SYMBOL(arm_smmu_get_dev_user_mpam_en); 4385

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