ring_iter 424 kernel/trace/trace_functions_graph.c struct ring_buffer_iter *ring_iter = NULL; ring_iter 437 kernel/trace/trace_functions_graph.c ring_iter = trace_buffer_iter(iter, iter->cpu); ring_iter 440 kernel/trace/trace_functions_graph.c if (ring_iter) ring_iter 441 kernel/trace/trace_functions_graph.c event = ring_buffer_iter_peek(ring_iter, NULL); ring_iter 484 kernel/trace/trace_functions_graph.c if (ring_iter) ring_iter 485 kernel/trace/trace_functions_graph.c ring_buffer_read(ring_iter, NULL);