867 static inline struct page *readahead_page(struct readahead_control *rac)  in readahead_page()  argument
871 	BUG_ON(rac->_batch_count > rac->_nr_pages);  in readahead_page()
872 	rac->_nr_pages -= rac->_batch_count;  in readahead_page()
873 	rac->_index += rac->_batch_count;  in readahead_page()
875 	if (!rac->_nr_pages) {  in readahead_page()
876 		rac->_batch_count = 0;  in readahead_page()
880 	page = xa_load(&rac->mapping->i_pages, rac->_index);  in readahead_page()
882 	rac->_batch_count = thp_nr_pages(page);  in readahead_page()
887 static inline unsigned int __readahead_batch(struct readahead_control *rac,  in __readahead_batch()  argument
891 	XA_STATE(xas, &rac->mapping->i_pages, 0);  in __readahead_batch()
894 	BUG_ON(rac->_batch_count > rac->_nr_pages);  in __readahead_batch()
895 	rac->_nr_pages -= rac->_batch_count;  in __readahead_batch()
896 	rac->_index += rac->_batch_count;  in __readahead_batch()
897 	rac->_batch_count = 0;  in __readahead_batch()
899 	xas_set(&xas, rac->_index);  in __readahead_batch()
901 	xas_for_each(&xas, page, rac->_index + rac->_nr_pages - 1) {  in __readahead_batch()
907 		rac->_batch_count += thp_nr_pages(page);  in __readahead_batch()
916 			xas_set(&xas, rac->_index + rac->_batch_count);  in __readahead_batch()
937 #define readahead_page_batch(rac, array)				\  argument
938 	__readahead_batch(rac, array, ARRAY_SIZE(array))
944 static inline loff_t readahead_pos(struct readahead_control *rac)  in readahead_pos()  argument
946 	return (loff_t)rac->_index * PAGE_SIZE;  in readahead_pos()
953 static inline size_t readahead_length(struct readahead_control *rac)  in readahead_length()  argument
955 	return rac->_nr_pages * PAGE_SIZE;  in readahead_length()
962 static inline pgoff_t readahead_index(struct readahead_control *rac)  in readahead_index()  argument
964 	return rac->_index;  in readahead_index()
971 static inline unsigned int readahead_count(struct readahead_control *rac)  in readahead_count()  argument
973 	return rac->_nr_pages;  in readahead_count()
980 static inline size_t readahead_batch_length(struct readahead_control *rac)  in readahead_batch_length()  argument
982 	return rac->_batch_count * PAGE_SIZE;  in readahead_batch_length()