1451 static inline unsigned int __readahead_batch(struct readahead_control *rac,  in __readahead_batch()  argument
1455 	XA_STATE(xas, &rac->mapping->i_pages, 0);  in __readahead_batch()
1458 	BUG_ON(rac->_batch_count > rac->_nr_pages);  in __readahead_batch()
1459 	rac->_nr_pages -= rac->_batch_count;  in __readahead_batch()
1460 	rac->_index += rac->_batch_count;  in __readahead_batch()
1461 	rac->_batch_count = 0;  in __readahead_batch()
1463 	xas_set(&xas, rac->_index);  in __readahead_batch()
1465 	xas_for_each(&xas, page, rac->_index + rac->_nr_pages - 1) {  in __readahead_batch()
1471 		rac->_batch_count += thp_nr_pages(page);  in __readahead_batch()
1491 #define readahead_page_batch(rac, array)				\  argument
1492 	__readahead_batch(rac, array, ARRAY_SIZE(array))
1498 static inline loff_t readahead_pos(struct readahead_control *rac)  in readahead_pos()  argument
1500 	return (loff_t)rac->_index * PAGE_SIZE;  in readahead_pos()
1507 static inline size_t readahead_length(struct readahead_control *rac)  in readahead_length()  argument
1509 	return rac->_nr_pages * PAGE_SIZE;  in readahead_length()
1516 static inline pgoff_t readahead_index(struct readahead_control *rac)  in readahead_index()  argument
1518 	return rac->_index;  in readahead_index()
1525 static inline unsigned int readahead_count(struct readahead_control *rac)  in readahead_count()  argument
1527 	return rac->_nr_pages;  in readahead_count()
1534 static inline size_t readahead_batch_length(struct readahead_control *rac)  in readahead_batch_length()  argument
1536 	return rac->_batch_count * PAGE_SIZE;  in readahead_batch_length()