90 	pipe->old_tail = 0;  in ipc_protocol_msg_prepipe_open()
238 	tail = pipe->old_tail;  in ipc_protocol_ul_td_send()
297 	struct ipc_protocol_td *p_td = &pipe->tdr_start[pipe->old_tail];  in ipc_protocol_ul_td_process()
298 	struct sk_buff *skb = pipe->skbr_start[pipe->old_tail];  in ipc_protocol_ul_td_process()
301 	pipe->old_tail++;  in ipc_protocol_ul_td_process()
302 	if (pipe->old_tail >= pipe->nr_of_entries)  in ipc_protocol_ul_td_process()
303 		pipe->old_tail = 0;  in ipc_protocol_ul_td_process()
382 	p_td = &pipe->tdr_start[pipe->old_tail];  in ipc_protocol_dl_td_process()
383 	skb = pipe->skbr_start[pipe->old_tail];  in ipc_protocol_dl_td_process()
386 	pipe->skbr_start[pipe->old_tail] = NULL;  in ipc_protocol_dl_td_process()
390 	pipe->old_tail++;  in ipc_protocol_dl_td_process()
391 	if (pipe->old_tail >= pipe->nr_of_entries)  in ipc_protocol_dl_td_process()
392 		pipe->old_tail = 0;  in ipc_protocol_dl_td_process()
456 	tail = pipe->old_tail;  in ipc_protocol_pipe_cleanup()
481 	pipe->old_tail = 0;  in ipc_protocol_pipe_cleanup()