369     if (channel->ch_part[PART_IN].ch_bufref.br_buf != NULL)  in channel_still_useful()
386 		       || channel->ch_part[PART_OUT].ch_bufref.br_buf != NULL)  in channel_still_useful()
389 		       || channel->ch_part[PART_ERR].ch_bufref.br_buf != NULL)  in channel_still_useful()
1237 		set_bufref(&channel->ch_part[PART_OUT].ch_bufref, buf);  in channel_set_options()
1255 	    buf = channel->ch_part[PART_OUT].ch_bufref.br_buf;  in channel_set_options()
1283 		set_bufref(&channel->ch_part[PART_ERR].ch_bufref, buf);  in channel_set_options()
1469 	set_bufref(&in_part->ch_bufref, job->jv_in_buf);  in channel_set_job()
1471 				 (char *)in_part->ch_bufref.br_buf->b_ffname);  in channel_set_job()
1478 		in_part->ch_bufref.br_buf->b_write_to_channel = TRUE;  in channel_set_job()
1481 			    in_part->ch_bufref.br_buf->b_ml.ml_line_count + 1;  in channel_set_job()
1491 	    in_part->ch_buf_bot = in_part->ch_bufref.br_buf->b_ml.ml_line_count;  in channel_set_job()
1627     buf_T	*buf = in_part->ch_bufref.br_buf;  in channel_write_in()
1632     if (!bufref_valid(&in_part->ch_bufref) || buf->b_ml.ml_mfp == NULL)  in channel_write_in()
1636 	in_part->ch_bufref.br_buf = NULL;  in channel_write_in()
1664 	in_part->ch_bufref.br_buf = NULL;  in channel_write_in()
1689 	    if (ch_part->ch_bufref.br_buf == buf)  in channel_buffer_free()
1693 		ch_part->ch_bufref.br_buf = NULL;  in channel_buffer_free()
1708     else if (in_part->ch_bufref.br_buf != NULL)  in channel_write_input()
1711 	    channel_write_new_lines(in_part->ch_bufref.br_buf);  in channel_write_input()
1746 	if (in_part->ch_bufref.br_buf == buf && in_part->ch_buf_append)  in channel_write_new_lines()
2729 	    if (in_part->ch_bufref.br_buf == buffer)  in append_to_buffer()
2782     buffer = ch_part->ch_bufref.br_buf;  in may_invoke_callback()
2783     if (buffer != NULL && (!bufref_valid(&ch_part->ch_bufref)  in may_invoke_callback()
2788 	ch_part->ch_bufref.br_buf = NULL;  in may_invoke_callback()
3166 			    || channel->ch_part[part].ch_bufref.br_buf != NULL)  in channel_close()
3328 		&& (in_part->ch_bufref.br_buf != NULL  in channel_fill_wfds()
3353 		&& (in_part->ch_bufref.br_buf != NULL  in channel_fill_poll_write()
4865 	if (channel->ch_part[part].ch_bufref.br_buf != NULL)  in f_ch_getbufnr()
4867 			      channel->ch_part[part].ch_bufref.br_buf->b_fnum;  in f_ch_getbufnr()