Hi Binfeng,

FYI, the error/warning still remains.

tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 4cbb736395eb31ff181c4488182276601992fa0b commit: 3bf501c87ffe1f045f86af89e8958fed62c02c94 [2439/2439] ascend agent smmu: an implementation of ARM SMMUv3 ATOS feature config: arm64-randconfig-004-20241117 (https://download.01.org/0day-ci/archive/20241117/202411171149.AYnfA3ex-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241117/202411171149.AYnfA3ex-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/202411171149.AYnfA3ex-lkp@intel.com/

All warnings (new ones prefixed by >>):

...

drivers/iommu/arm/arm-smmu-v3/ascend_smmu.c:71:20: warning: no previous prototype for 'agent_smmu_unlocked_find' [-Wmissing-prototypes]

71 | struct agent_smmu *agent_smmu_unlocked_find(u64 device_id) | ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/iommu/arm/arm-smmu-v3/ascend_smmu.c: In function 'agent_smmu_platform_probe': drivers/iommu/arm/arm-smmu-v3/ascend_smmu.c:145:18: error: implicit declaration of function 'acpi_evaluate_integer'; did you mean 'acpi_evaluate_object'? [-Werror=implicit-function-declaration] 145 | status = acpi_evaluate_integer(ACPI_HANDLE(&pdev->dev), METHOD_NAME__UID, | ^~~~~~~~~~~~~~~~~~~~~ | acpi_evaluate_object drivers/iommu/arm/arm-smmu-v3/ascend_smmu.c: At top level:

...

drivers/iommu/arm/arm-smmu-v3/ascend_smmu.c:420:36: warning: 'agent_smmu_acpi_match' defined but not used [-Wunused-const-variable=]

420 | static const struct acpi_device_id agent_smmu_acpi_match[] = { | ^~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors

vim +/agent_smmu_unlocked_find +71 drivers/iommu/arm/arm-smmu-v3/ascend_smmu.c

70

71 struct agent_smmu *agent_smmu_unlocked_find(u64 device_id)

72 { 73 struct agent_smmu *temp = NULL; 74 75 list_for_each_entry(temp, &agent_smmu_list, list) { 76 if (temp->device_id == device_id) { 77 return temp; 78 } 79 } 80 return NULL; 81 } 82