1357 #define DEFINE_READAHEAD(ractl, f, r, m, i)				\  argument
1358 	struct readahead_control ractl = {				\
1372 void readahead_expand(struct readahead_control *ractl,
1393 	DEFINE_READAHEAD(ractl, file, ra, mapping, index);  in page_cache_sync_readahead()
1394 	page_cache_sync_ra(&ractl, req_count);  in page_cache_sync_readahead()
1415 	DEFINE_READAHEAD(ractl, file, ra, mapping, folio->index);  in page_cache_async_readahead()
1416 	page_cache_async_ra(&ractl, folio, req_count);  in page_cache_async_readahead()
1419 static inline struct folio *__readahead_folio(struct readahead_control *ractl)  in __readahead_folio()  argument
1423 	BUG_ON(ractl->_batch_count > ractl->_nr_pages);  in __readahead_folio()
1424 	ractl->_nr_pages -= ractl->_batch_count;  in __readahead_folio()
1425 	ractl->_index += ractl->_batch_count;  in __readahead_folio()
1427 	if (!ractl->_nr_pages) {  in __readahead_folio()
1428 		ractl->_batch_count = 0;  in __readahead_folio()
1432 	folio = xa_load(&ractl->mapping->i_pages, ractl->_index);  in __readahead_folio()
1434 	ractl->_batch_count = folio_nr_pages(folio);  in __readahead_folio()
1448 static inline struct page *readahead_page(struct readahead_control *ractl)  in readahead_page()  argument
1450 	struct folio *folio = __readahead_folio(ractl);  in readahead_page()
1463 static inline struct folio *readahead_folio(struct readahead_control *ractl)  in readahead_folio()  argument
1465 	struct folio *folio = __readahead_folio(ractl);  in readahead_folio()