tracing_update_buffers
ret = tracing_update_buffers(tr);
int tracing_update_buffers(struct trace_array *tr);
ret = tracing_update_buffers(tr);
ret = tracing_update_buffers(file->tr);
ret = tracing_update_buffers(dir->tr);
ret = tracing_update_buffers(tr);
if (tracing_update_buffers(NULL) < 0)