1091 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
1102 	struct pipe_inode_info *ipipe;  in do_splice()  local
1107 	ipipe = get_pipe_info(in);  in do_splice()
1110 	if (ipipe && opipe) {  in do_splice()
1121 		if (ipipe == opipe)  in do_splice()
1127 		return splice_pipe_to_pipe(ipipe, opipe, len, flags);  in do_splice()
1130 	if (ipipe) {  in do_splice()
1156 		ret = do_splice_from(ipipe, out, &offset, len, flags);  in do_splice()
1526 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,  in splice_pipe_to_pipe()  argument
1536 	ret = ipipe_prep(ipipe, flags);  in splice_pipe_to_pipe()
1549 	pipe_double_lock(ipipe, opipe);  in splice_pipe_to_pipe()
1559 		if (!ipipe->nrbufs && !ipipe->writers)  in splice_pipe_to_pipe()
1566 		if (!ipipe->nrbufs || opipe->nrbufs >= opipe->buffers) {  in splice_pipe_to_pipe()
1581 			pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1586 		ibuf = ipipe->bufs + ipipe->curbuf;  in splice_pipe_to_pipe()
1597 			ipipe->curbuf = (ipipe->curbuf + 1) & (ipipe->buffers - 1);  in splice_pipe_to_pipe()
1598 			ipipe->nrbufs--;  in splice_pipe_to_pipe()
1605 			if (!pipe_buf_get(ipipe, ibuf)) {  in splice_pipe_to_pipe()
1629 	pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1639 		wakeup_pipe_writers(ipipe);  in splice_pipe_to_pipe()
1647 static int link_pipe(struct pipe_inode_info *ipipe,  in link_pipe()  argument
1659 	pipe_double_lock(ipipe, opipe);  in link_pipe()
1673 		if (i >= ipipe->nrbufs || opipe->nrbufs >= opipe->buffers)  in link_pipe()
1676 		ibuf = ipipe->bufs + ((ipipe->curbuf + i) & (ipipe->buffers-1));  in link_pipe()
1683 		if (!pipe_buf_get(ipipe, ibuf)) {  in link_pipe()
1713 	if (!ret && ipipe->waiting_writers && (flags & SPLICE_F_NONBLOCK))  in link_pipe()
1716 	pipe_unlock(ipipe);  in link_pipe()
1737 	struct pipe_inode_info *ipipe = get_pipe_info(in);  in do_tee()  local
1745 	if (ipipe && opipe && ipipe != opipe) {  in do_tee()
1753 		ret = ipipe_prep(ipipe, flags);  in do_tee()
1757 				ret = link_pipe(ipipe, opipe, len, flags);  in do_tee()