get_trace_fd      127 trace.c        	write_or_whine_pipe(get_trace_fd(key), buf, len, err_msg);
get_trace_fd      134 trace.c        	write_or_whine_pipe(get_trace_fd(key), buf->buf, buf->len, err_msg);
get_trace_fd      330 trace.c        	return !!get_trace_fd(key);