1256 #define DEFINE_READAHEAD(ractl, f, r, m, i)				\  argument
1257 	struct readahead_control ractl = {				\
1271 void readahead_expand(struct readahead_control *ractl,
1292 	DEFINE_READAHEAD(ractl, file, ra, mapping, index);  in page_cache_sync_readahead()
1293 	page_cache_sync_ra(&ractl, req_count);  in page_cache_sync_readahead()
1315 	DEFINE_READAHEAD(ractl, file, ra, mapping, index);  in page_cache_async_readahead()
1316 	page_cache_async_ra(&ractl, folio, req_count);  in page_cache_async_readahead()
1319 static inline struct folio *__readahead_folio(struct readahead_control *ractl)  in __readahead_folio()  argument
1323 	BUG_ON(ractl->_batch_count > ractl->_nr_pages);  in __readahead_folio()
1324 	ractl->_nr_pages -= ractl->_batch_count;  in __readahead_folio()
1325 	ractl->_index += ractl->_batch_count;  in __readahead_folio()
1327 	if (!ractl->_nr_pages) {  in __readahead_folio()
1328 		ractl->_batch_count = 0;  in __readahead_folio()
1332 	folio = xa_load(&ractl->mapping->i_pages, ractl->_index);  in __readahead_folio()
1334 	ractl->_batch_count = folio_nr_pages(folio);  in __readahead_folio()
1348 static inline struct page *readahead_page(struct readahead_control *ractl)  in readahead_page()  argument
1350 	struct folio *folio = __readahead_folio(ractl);  in readahead_page()
1363 static inline struct folio *readahead_folio(struct readahead_control *ractl)  in readahead_folio()  argument
1365 	struct folio *folio = __readahead_folio(ractl);  in readahead_folio()