918 static inline struct page *readahead_page(struct readahead_control *rac)  in readahead_page()  argument
922 	BUG_ON(rac->_batch_count > rac->_nr_pages);  in readahead_page()
923 	rac->_nr_pages -= rac->_batch_count;  in readahead_page()
924 	rac->_index += rac->_batch_count;  in readahead_page()
926 	if (!rac->_nr_pages) {  in readahead_page()
927 		rac->_batch_count = 0;  in readahead_page()
931 	page = xa_load(&rac->mapping->i_pages, rac->_index);  in readahead_page()
933 	rac->_batch_count = thp_nr_pages(page);  in readahead_page()
938 static inline unsigned int __readahead_batch(struct readahead_control *rac,  in __readahead_batch()  argument
942 	XA_STATE(xas, &rac->mapping->i_pages, 0);  in __readahead_batch()
945 	BUG_ON(rac->_batch_count > rac->_nr_pages);  in __readahead_batch()
946 	rac->_nr_pages -= rac->_batch_count;  in __readahead_batch()
947 	rac->_index += rac->_batch_count;  in __readahead_batch()
948 	rac->_batch_count = 0;  in __readahead_batch()
950 	xas_set(&xas, rac->_index);  in __readahead_batch()
952 	xas_for_each(&xas, page, rac->_index + rac->_nr_pages - 1) {  in __readahead_batch()
958 		rac->_batch_count += thp_nr_pages(page);  in __readahead_batch()
967 			xas_set(&xas, rac->_index + rac->_batch_count);  in __readahead_batch()
988 #define readahead_page_batch(rac, array)				\  argument
989 	__readahead_batch(rac, array, ARRAY_SIZE(array))
995 static inline loff_t readahead_pos(struct readahead_control *rac)  in readahead_pos()  argument
997 	return (loff_t)rac->_index * PAGE_SIZE;  in readahead_pos()
1004 static inline size_t readahead_length(struct readahead_control *rac)  in readahead_length()  argument
1006 	return rac->_nr_pages * PAGE_SIZE;  in readahead_length()
1013 static inline pgoff_t readahead_index(struct readahead_control *rac)  in readahead_index()  argument
1015 	return rac->_index;  in readahead_index()
1022 static inline unsigned int readahead_count(struct readahead_control *rac)  in readahead_count()  argument
1024 	return rac->_nr_pages;  in readahead_count()
1031 static inline size_t readahead_batch_length(struct readahead_control *rac)  in readahead_batch_length()  argument
1033 	return rac->_batch_count * PAGE_SIZE;  in readahead_batch_length()