perf_amd_iommu_list 47 arch/x86/events/amd/iommu.c static LIST_HEAD(perf_amd_iommu_list); perf_amd_iommu_list 441 arch/x86/events/amd/iommu.c list_add_tail(&perf_iommu->list, &perf_amd_iommu_list);