3493 	struct ring_buffer_iter *buf_iter = trace_buffer_iter(iter, iter->cpu);  in trace_iterator_increment()  local
3496 	if (buf_iter)  in trace_iterator_increment()
3497 		ring_buffer_iter_advance(buf_iter);  in trace_iterator_increment()
3505 	struct ring_buffer_iter *buf_iter = trace_buffer_iter(iter, cpu);  in peek_next_entry()  local
3507 	if (buf_iter) {  in peek_next_entry()
3508 		event = ring_buffer_iter_peek(buf_iter, ts);  in peek_next_entry()
3510 			*lost_events = ring_buffer_iter_dropped(buf_iter) ?  in peek_next_entry()
3873 	struct ring_buffer_iter *buf_iter;  in tracing_iter_reset()  local
3879 	buf_iter = trace_buffer_iter(iter, cpu);  in tracing_iter_reset()
3880 	if (!buf_iter)  in tracing_iter_reset()
3883 	ring_buffer_iter_reset(buf_iter);  in tracing_iter_reset()
3890 	while (ring_buffer_iter_peek(buf_iter, &ts)) {  in tracing_iter_reset()
3894 		ring_buffer_iter_advance(buf_iter);  in tracing_iter_reset()
4297 	struct ring_buffer_iter *buf_iter;  in trace_empty()  local
4303 		buf_iter = trace_buffer_iter(iter, cpu);  in trace_empty()
4304 		if (buf_iter) {  in trace_empty()
4305 			if (!ring_buffer_iter_empty(buf_iter))  in trace_empty()
4315 		buf_iter = trace_buffer_iter(iter, cpu);  in trace_empty()
4316 		if (buf_iter) {  in trace_empty()
4317 			if (!ring_buffer_iter_empty(buf_iter))  in trace_empty()