mm/rmap: duplicate a PMD mapping as one in folio_dup_file_rmap_pmd()

On 11/4/26 9:40 PM, Konstantin Khorenko wrote: > folio_dup_file_rmap_pmd() passes PGTABLE_LEVEL_PTE to > __folio_dup_file_rmap() for HPAGE_PMD_NR pages, so it adds HPAGE_PMD_NR > PTE mappings to the f