FTRACE_START_FUNC_RET  603 kernel/trace/fgraph.c 	ret = ftrace_startup(&graph_ops, FTRACE_START_FUNC_RET);
FTRACE_START_FUNC_RET 2572 kernel/trace/ftrace.c 	if (command & FTRACE_START_FUNC_RET)
FTRACE_START_FUNC_RET 2841 kernel/trace/ftrace.c 			command |= FTRACE_START_FUNC_RET;