71     for ((ch) = first_channel; (ch) != NULL; (ch) = (ch)->ch_next)
334 	channel->ch_next = first_channel;  in add_channel()
420     if (channel->ch_next != NULL)  in channel_free_channel()
421 	channel->ch_next->ch_prev = channel->ch_prev;  in channel_free_channel()
423 	first_channel = channel->ch_next;  in channel_free_channel()
425 	channel->ch_prev->ch_next = channel->ch_next;  in channel_free_channel()
502     channel_T	*ch_next;  in free_unused_channels()  local
504     for (ch = first_channel; ch != NULL; ch = ch_next)  in free_unused_channels()
506 	ch_next = ch->ch_next;  in free_unused_channels()
4676 	    channel = channel->ch_next;  in channel_parse_messages()
4711 	    channel = channel->ch_next;  in channel_any_readahead()
4729 						   channel = channel->ch_next)  in set_ref_in_channel()