282 static inline void bio_first_folio(struct folio_iter *fi, struct bio *bio,  in bio_first_folio()  argument
288 		fi->folio = NULL;  in bio_first_folio()
292 	fi->folio = page_folio(bvec->bv_page);  in bio_first_folio()
293 	fi->offset = bvec->bv_offset +  in bio_first_folio()
294 			PAGE_SIZE * (bvec->bv_page - &fi->folio->page);  in bio_first_folio()
295 	fi->_seg_count = bvec->bv_len;  in bio_first_folio()
296 	fi->length = min(folio_size(fi->folio) - fi->offset, fi->_seg_count);  in bio_first_folio()
297 	fi->_next = folio_next(fi->folio);  in bio_first_folio()
298 	fi->_i = i;  in bio_first_folio()
301 static inline void bio_next_folio(struct folio_iter *fi, struct bio *bio)  in bio_next_folio()  argument
303 	fi->_seg_count -= fi->length;  in bio_next_folio()
304 	if (fi->_seg_count) {  in bio_next_folio()
305 		fi->folio = fi->_next;  in bio_next_folio()
306 		fi->offset = 0;  in bio_next_folio()
307 		fi->length = min(folio_size(fi->folio), fi->_seg_count);  in bio_next_folio()
308 		fi->_next = folio_next(fi->folio);  in bio_next_folio()
310 		bio_first_folio(fi, bio, fi->_i + 1);  in bio_next_folio()
319 #define bio_for_each_folio_all(fi, bio)				\  argument
320 	for (bio_first_folio(&fi, bio, 0); fi.folio; bio_next_folio(&fi, bio))