375 	struct bio *head;  member
381 	return bl->head == NULL;  in bio_list_empty()
386 	bl->head = bl->tail = NULL;  in bio_list_init()
390 	for (bio = (bl)->head; bio; bio = bio->bi_next)
410 		bl->head = bio;  in bio_list_add()
417 	bio->bi_next = bl->head;  in bio_list_add_head()
419 	bl->head = bio;  in bio_list_add_head()
427 	if (!bl2->head)  in bio_list_merge()
431 		bl->tail->bi_next = bl2->head;  in bio_list_merge()
433 		bl->head = bl2->head;  in bio_list_merge()
441 	if (!bl2->head)  in bio_list_merge_head()
444 	if (bl->head)  in bio_list_merge_head()
445 		bl2->tail->bi_next = bl->head;  in bio_list_merge_head()
449 	bl->head = bl2->head;  in bio_list_merge_head()
454 	return bl->head;  in bio_list_peek()
459 	struct bio *bio = bl->head;  in bio_list_pop()
462 		bl->head = bl->head->bi_next;  in bio_list_pop()
463 		if (!bl->head)  in bio_list_pop()
474 	struct bio *bio = bl->head;  in bio_list_get()
476 	bl->head = bl->tail = NULL;  in bio_list_get()