static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping,
						 struct writeback_control *wbc,
						 struct folio *folio,
						 loff_t start, loff_t end)
static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping,
						 struct writeback_control *wbc,
						 struct xa_state *xas,
						 struct folio *folio,
						 unsigned long long start,
						 unsigned long long end)