1722 	unsigned int i_tail, o_tail;  in splice_pipe_to_pipe()  local
1743 	i_tail = ipipe->tail;  in splice_pipe_to_pipe()
1759 		if (pipe_empty(i_head, i_tail) && !ipipe->writers)  in splice_pipe_to_pipe()
1766 		if (pipe_empty(i_head, i_tail) ||  in splice_pipe_to_pipe()
1787 		ibuf = pipe_buf(ipipe, i_tail);  in splice_pipe_to_pipe()
1796 			i_tail++;  in splice_pipe_to_pipe()
1797 			ipipe->tail = i_tail;  in splice_pipe_to_pipe()
1856 	unsigned int i_tail, o_tail;  in link_pipe()  local
1866 	i_tail = ipipe->tail;  in link_pipe()
1884 		if (pipe_empty(i_head, i_tail) ||  in link_pipe()
1888 		ibuf = pipe_buf(ipipe, i_tail);  in link_pipe()
1917 		i_tail++;  in link_pipe()