1276 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
1303 	struct pipe_inode_info *ipipe;  in do_splice()  local
1312 	ipipe = get_pipe_info(in, true);  in do_splice()
1315 	if (ipipe && opipe) {  in do_splice()
1320 		if (ipipe == opipe)  in do_splice()
1326 		ret = splice_pipe_to_pipe(ipipe, opipe, len, flags);  in do_splice()
1327 	} else if (ipipe) {  in do_splice()
1349 		ret = do_splice_from(ipipe, out, &offset, len, flags);  in do_splice()
1401 	struct pipe_inode_info *ipipe;  in __do_splice()  local
1406 	ipipe = get_pipe_info(in, true);  in __do_splice()
1409 	if (ipipe) {  in __do_splice()
1716 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,  in splice_pipe_to_pipe()  argument
1728 	ret = ipipe_prep(ipipe, flags);  in splice_pipe_to_pipe()
1741 	pipe_double_lock(ipipe, opipe);  in splice_pipe_to_pipe()
1743 	i_tail = ipipe->tail;  in splice_pipe_to_pipe()
1756 		i_head = ipipe->head;  in splice_pipe_to_pipe()
1759 		if (pipe_empty(i_head, i_tail) && !ipipe->writers)  in splice_pipe_to_pipe()
1782 			pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1787 		ibuf = pipe_buf(ipipe, i_tail);  in splice_pipe_to_pipe()
1797 			ipipe->tail = i_tail;  in splice_pipe_to_pipe()
1807 			if (!pipe_buf_get(ipipe, ibuf)) {  in splice_pipe_to_pipe()
1832 	pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1842 		wakeup_pipe_writers(ipipe);  in splice_pipe_to_pipe()
1850 static ssize_t link_pipe(struct pipe_inode_info *ipipe,  in link_pipe()  argument
1864 	pipe_double_lock(ipipe, opipe);  in link_pipe()
1866 	i_tail = ipipe->tail;  in link_pipe()
1877 		i_head = ipipe->head;  in link_pipe()
1888 		ibuf = pipe_buf(ipipe, i_tail);  in link_pipe()
1895 		if (!pipe_buf_get(ipipe, ibuf)) {  in link_pipe()
1920 	pipe_unlock(ipipe);  in link_pipe()
1941 	struct pipe_inode_info *ipipe = get_pipe_info(in, true);  in do_tee()  local
1953 	if (ipipe && opipe && ipipe != opipe) {  in do_tee()
1961 		ret = ipipe_prep(ipipe, flags);  in do_tee()
1965 				ret = link_pipe(ipipe, opipe, len, flags);  in do_tee()