999 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
1026 	struct pipe_inode_info *ipipe;  in do_splice()  local
1035 	ipipe = get_pipe_info(in, true);  in do_splice()
1038 	if (ipipe && opipe) {  in do_splice()
1043 		if (ipipe == opipe)  in do_splice()
1049 		return splice_pipe_to_pipe(ipipe, opipe, len, flags);  in do_splice()
1052 	if (ipipe) {  in do_splice()
1074 		ret = do_splice_from(ipipe, out, &offset, len, flags);  in do_splice()
1115 	struct pipe_inode_info *ipipe;  in __do_splice()  local
1120 	ipipe = get_pipe_info(in, true);  in __do_splice()
1123 	if (ipipe && off_in)  in __do_splice()
1433 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,  in splice_pipe_to_pipe()  argument
1446 	ret = ipipe_prep(ipipe, flags);  in splice_pipe_to_pipe()
1459 	pipe_double_lock(ipipe, opipe);  in splice_pipe_to_pipe()
1461 	i_tail = ipipe->tail;  in splice_pipe_to_pipe()
1462 	i_mask = ipipe->ring_size - 1;  in splice_pipe_to_pipe()
1476 		i_head = ipipe->head;  in splice_pipe_to_pipe()
1479 		if (pipe_empty(i_head, i_tail) && !ipipe->writers)  in splice_pipe_to_pipe()
1502 			pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1507 		ibuf = &ipipe->bufs[i_tail & i_mask];  in splice_pipe_to_pipe()
1517 			ipipe->tail = i_tail;  in splice_pipe_to_pipe()
1527 			if (!pipe_buf_get(ipipe, ibuf)) {  in splice_pipe_to_pipe()
1552 	pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1562 		wakeup_pipe_writers(ipipe);  in splice_pipe_to_pipe()
1570 static int link_pipe(struct pipe_inode_info *ipipe,  in link_pipe()  argument
1585 	pipe_double_lock(ipipe, opipe);  in link_pipe()
1587 	i_tail = ipipe->tail;  in link_pipe()
1588 	i_mask = ipipe->ring_size - 1;  in link_pipe()
1600 		i_head = ipipe->head;  in link_pipe()
1611 		ibuf = &ipipe->bufs[i_tail & i_mask];  in link_pipe()
1618 		if (!pipe_buf_get(ipipe, ibuf)) {  in link_pipe()
1643 	pipe_unlock(ipipe);  in link_pipe()
1663 	struct pipe_inode_info *ipipe = get_pipe_info(in, true);  in do_tee()  local
1675 	if (ipipe && opipe && ipipe != opipe) {  in do_tee()
1683 		ret = ipipe_prep(ipipe, flags);  in do_tee()
1687 				ret = link_pipe(ipipe, opipe, len, flags);  in do_tee()