1089 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
1100 	struct pipe_inode_info *ipipe;  in do_splice()  local
1105 	ipipe = get_pipe_info(in);  in do_splice()
1108 	if (ipipe && opipe) {  in do_splice()
1119 		if (ipipe == opipe)  in do_splice()
1122 		return splice_pipe_to_pipe(ipipe, opipe, len, flags);  in do_splice()
1125 	if (ipipe) {  in do_splice()
1148 		ret = do_splice_from(ipipe, out, &offset, len, flags);  in do_splice()
1508 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,  in splice_pipe_to_pipe()  argument
1518 	ret = ipipe_prep(ipipe, flags);  in splice_pipe_to_pipe()
1531 	pipe_double_lock(ipipe, opipe);  in splice_pipe_to_pipe()
1541 		if (!ipipe->nrbufs && !ipipe->writers)  in splice_pipe_to_pipe()
1548 		if (!ipipe->nrbufs || opipe->nrbufs >= opipe->buffers) {  in splice_pipe_to_pipe()
1563 			pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1568 		ibuf = ipipe->bufs + ipipe->curbuf;  in splice_pipe_to_pipe()
1579 			ipipe->curbuf = (ipipe->curbuf + 1) & (ipipe->buffers - 1);  in splice_pipe_to_pipe()
1580 			ipipe->nrbufs--;  in splice_pipe_to_pipe()
1587 			pipe_buf_get(ipipe, ibuf);  in splice_pipe_to_pipe()
1605 	pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1615 		wakeup_pipe_writers(ipipe);  in splice_pipe_to_pipe()
1623 static int link_pipe(struct pipe_inode_info *ipipe,  in link_pipe()  argument
1635 	pipe_double_lock(ipipe, opipe);  in link_pipe()
1649 		if (i >= ipipe->nrbufs || opipe->nrbufs >= opipe->buffers)  in link_pipe()
1652 		ibuf = ipipe->bufs + ((ipipe->curbuf + i) & (ipipe->buffers-1));  in link_pipe()
1659 		pipe_buf_get(ipipe, ibuf);  in link_pipe()
1683 	if (!ret && ipipe->waiting_writers && (flags & SPLICE_F_NONBLOCK))  in link_pipe()
1686 	pipe_unlock(ipipe);  in link_pipe()
1707 	struct pipe_inode_info *ipipe = get_pipe_info(in);  in do_tee()  local
1715 	if (ipipe && opipe && ipipe != opipe) {  in do_tee()
1720 		ret = ipipe_prep(ipipe, flags);  in do_tee()
1724 				ret = link_pipe(ipipe, opipe, len, flags);  in do_tee()