Constant userfaultfd_sys::UFFD_API_FEATURES

pub const UFFD_API_FEATURES: u64 = UFFD_FEATURE_EVENT_FORK
    | UFFD_FEATURE_EVENT_REMAP
    | UFFD_FEATURE_EVENT_REMOVE
    | UFFD_FEATURE_EVENT_UNMAP
    | UFFD_FEATURE_MISSING_HUGETLBFS
    | UFFD_FEATURE_MISSING_SHMEM; // 126u64