hugetlb_vmemmap_restore_folio
if (clear_flag && hugetlb_vmemmap_restore_folio(h, folio)) {
if (hugetlb_vmemmap_restore_folio(h, folio)) {
rc = hugetlb_vmemmap_restore_folio(h, folio);
int hugetlb_vmemmap_restore_folio(const struct hstate *h, struct folio *folio);