1001 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
1011 	struct pipe_inode_info *ipipe;  in do_splice()  local
1020 	ipipe = get_pipe_info(in, true);  in do_splice()
1023 	if (ipipe && opipe) {  in do_splice()
1028 		if (ipipe == opipe)  in do_splice()
1034 		return splice_pipe_to_pipe(ipipe, opipe, len, flags);  in do_splice()
1037 	if (ipipe) {  in do_splice()
1059 		ret = do_splice_from(ipipe, out, &offset, len, flags);  in do_splice()
1113 	struct pipe_inode_info *ipipe;  in __do_splice()  local
1118 	ipipe = get_pipe_info(in, true);  in __do_splice()
1121 	if (ipipe && off_in)  in __do_splice()
1430 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,  in splice_pipe_to_pipe()  argument
1443 	ret = ipipe_prep(ipipe, flags);  in splice_pipe_to_pipe()
1456 	pipe_double_lock(ipipe, opipe);  in splice_pipe_to_pipe()
1458 	i_tail = ipipe->tail;  in splice_pipe_to_pipe()
1459 	i_mask = ipipe->ring_size - 1;  in splice_pipe_to_pipe()
1473 		i_head = ipipe->head;  in splice_pipe_to_pipe()
1476 		if (pipe_empty(i_head, i_tail) && !ipipe->writers)  in splice_pipe_to_pipe()
1499 			pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1504 		ibuf = &ipipe->bufs[i_tail & i_mask];  in splice_pipe_to_pipe()
1514 			ipipe->tail = i_tail;  in splice_pipe_to_pipe()
1524 			if (!pipe_buf_get(ipipe, ibuf)) {  in splice_pipe_to_pipe()
1549 	pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1559 		wakeup_pipe_writers(ipipe);  in splice_pipe_to_pipe()
1567 static int link_pipe(struct pipe_inode_info *ipipe,  in link_pipe()  argument
1582 	pipe_double_lock(ipipe, opipe);  in link_pipe()
1584 	i_tail = ipipe->tail;  in link_pipe()
1585 	i_mask = ipipe->ring_size - 1;  in link_pipe()
1597 		i_head = ipipe->head;  in link_pipe()
1608 		ibuf = &ipipe->bufs[i_tail & i_mask];  in link_pipe()
1615 		if (!pipe_buf_get(ipipe, ibuf)) {  in link_pipe()
1640 	pipe_unlock(ipipe);  in link_pipe()
1660 	struct pipe_inode_info *ipipe = get_pipe_info(in, true);  in do_tee()  local
1672 	if (ipipe && opipe && ipipe != opipe) {  in do_tee()
1680 		ret = ipipe_prep(ipipe, flags);  in do_tee()
1684 				ret = link_pipe(ipipe, opipe, len, flags);  in do_tee()