1176 #define DEFINE_READAHEAD(ractl, f, r, m, i)				\  argument
1177 	struct readahead_control ractl = {				\
1191 void readahead_expand(struct readahead_control *ractl,
1212 	DEFINE_READAHEAD(ractl, file, ra, mapping, index);  in page_cache_sync_readahead()
1213 	page_cache_sync_ra(&ractl, req_count);  in page_cache_sync_readahead()
1235 	DEFINE_READAHEAD(ractl, file, ra, mapping, index);  in page_cache_async_readahead()
1236 	page_cache_async_ra(&ractl, folio, req_count);  in page_cache_async_readahead()
1239 static inline struct folio *__readahead_folio(struct readahead_control *ractl)  in __readahead_folio()  argument
1243 	BUG_ON(ractl->_batch_count > ractl->_nr_pages);  in __readahead_folio()
1244 	ractl->_nr_pages -= ractl->_batch_count;  in __readahead_folio()
1245 	ractl->_index += ractl->_batch_count;  in __readahead_folio()
1247 	if (!ractl->_nr_pages) {  in __readahead_folio()
1248 		ractl->_batch_count = 0;  in __readahead_folio()
1252 	folio = xa_load(&ractl->mapping->i_pages, ractl->_index);  in __readahead_folio()
1254 	ractl->_batch_count = folio_nr_pages(folio);  in __readahead_folio()
1268 static inline struct page *readahead_page(struct readahead_control *ractl)  in readahead_page()  argument
1270 	struct folio *folio = __readahead_folio(ractl);  in readahead_page()
1283 static inline struct folio *readahead_folio(struct readahead_control *ractl)  in readahead_folio()  argument
1285 	struct folio *folio = __readahead_folio(ractl);  in readahead_folio()