| #val_type uint64_t | |
| UFFD_FEATURE_PAGEFAULT_FLAG_WP | |
| UFFD_FEATURE_EVENT_FORK | |
| UFFD_FEATURE_EVENT_REMAP | |
| UFFD_FEATURE_EVENT_REMOVE | |
| UFFD_FEATURE_MISSING_HUGETLBFS | |
| UFFD_FEATURE_MISSING_SHMEM | |
| UFFD_FEATURE_EVENT_UNMAP | |
| UFFD_FEATURE_SIGBUS | |
| UFFD_FEATURE_THREAD_ID |