unmap_poisoned_folio
int unmap_poisoned_folio(struct folio *folio, unsigned long pfn, bool must_kill);
unmap_success = !unmap_poisoned_folio(folio, pfn, flags & MF_MUST_KILL);
unmap_poisoned_folio(folio, pfn, false);
unmap_poisoned_folio(folio, folio_pfn(folio), false);