hugetlb_add_to_page_cache
error = hugetlb_add_to_page_cache(folio, mapping, index);
int hugetlb_add_to_page_cache(struct folio *folio, struct address_space *mapping,
int err = hugetlb_add_to_page_cache(folio, mapping,
ret = hugetlb_add_to_page_cache(folio, mapping, idx);
err = hugetlb_add_to_page_cache(folio,