iommu_group_unregister_notifier  928 drivers/iommu/iommu.c int iommu_group_unregister_notifier(struct iommu_group *group,
iommu_group_unregister_notifier  820 include/linux/iommu.h static inline int iommu_group_unregister_notifier(struct iommu_group *group,