1679 	unsigned int i_tail, o_tail;  in splice_pipe_to_pipe()  local
1701 	i_tail = ipipe->tail;  in splice_pipe_to_pipe()
1719 		if (pipe_empty(i_head, i_tail) && !ipipe->writers)  in splice_pipe_to_pipe()
1726 		if (pipe_empty(i_head, i_tail) ||  in splice_pipe_to_pipe()
1747 		ibuf = &ipipe->bufs[i_tail & i_mask];  in splice_pipe_to_pipe()
1756 			i_tail++;  in splice_pipe_to_pipe()
1757 			ipipe->tail = i_tail;  in splice_pipe_to_pipe()
1816 	unsigned int i_tail, o_tail;  in link_pipe()  local
1827 	i_tail = ipipe->tail;  in link_pipe()
1847 		if (pipe_empty(i_head, i_tail) ||  in link_pipe()
1851 		ibuf = &ipipe->bufs[i_tail & i_mask];  in link_pipe()
1880 		i_tail++;  in link_pipe()