1344 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
1355 	struct pipe_inode_info *ipipe;  in do_splice()  local
1360 	ipipe = get_pipe_info(in);  in do_splice()
1363 	if (ipipe && opipe) {  in do_splice()
1374 		if (ipipe == opipe)  in do_splice()
1377 		return splice_pipe_to_pipe(ipipe, opipe, len, flags);  in do_splice()
1380 	if (ipipe) {  in do_splice()
1403 		ret = do_splice_from(ipipe, out, &offset, len, flags);  in do_splice()
1799 static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,  in splice_pipe_to_pipe()  argument
1809 	ret = ipipe_prep(ipipe, flags);  in splice_pipe_to_pipe()
1822 	pipe_double_lock(ipipe, opipe);  in splice_pipe_to_pipe()
1832 		if (!ipipe->nrbufs && !ipipe->writers)  in splice_pipe_to_pipe()
1839 		if (!ipipe->nrbufs || opipe->nrbufs >= opipe->buffers) {  in splice_pipe_to_pipe()
1854 			pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1859 		ibuf = ipipe->bufs + ipipe->curbuf;  in splice_pipe_to_pipe()
1870 			ipipe->curbuf = (ipipe->curbuf + 1) & (ipipe->buffers - 1);  in splice_pipe_to_pipe()
1871 			ipipe->nrbufs--;  in splice_pipe_to_pipe()
1878 			ibuf->ops->get(ipipe, ibuf);  in splice_pipe_to_pipe()
1896 	pipe_unlock(ipipe);  in splice_pipe_to_pipe()
1906 		wakeup_pipe_writers(ipipe);  in splice_pipe_to_pipe()
1914 static int link_pipe(struct pipe_inode_info *ipipe,  in link_pipe()  argument
1926 	pipe_double_lock(ipipe, opipe);  in link_pipe()
1940 		if (i >= ipipe->nrbufs || opipe->nrbufs >= opipe->buffers)  in link_pipe()
1943 		ibuf = ipipe->bufs + ((ipipe->curbuf + i) & (ipipe->buffers-1));  in link_pipe()
1950 		ibuf->ops->get(ipipe, ibuf);  in link_pipe()
1974 	if (!ret && ipipe->waiting_writers && (flags & SPLICE_F_NONBLOCK))  in link_pipe()
1977 	pipe_unlock(ipipe);  in link_pipe()
1998 	struct pipe_inode_info *ipipe = get_pipe_info(in);  in do_tee()  local
2006 	if (ipipe && opipe && ipipe != opipe) {  in do_tee()
2011 		ret = ipipe_prep(ipipe, flags);  in do_tee()
2015 				ret = link_pipe(ipipe, opipe, len, flags);  in do_tee()