PG_owner_priv_1
u |= kpf_copy_bit(k, KPF_OWNER_PRIVATE, PG_owner_priv_1);
PG_swapcache = PG_owner_priv_1, /* Swap page: swp_entry_t in private */
PG_checked = PG_owner_priv_1,
PG_pinned = PG_owner_priv_1,
PG_foreign = PG_owner_priv_1,
PG_xen_remapped = PG_owner_priv_1,
PG_vmemmap_self_hosted = PG_owner_priv_1,