FTRACE_OPS_FL_GRAPH
if (WARN_ONCE(gops->ops.flags & FTRACE_OPS_FL_GRAPH,
gops->ops.flags |= FTRACE_OPS_FL_GRAPH;
if (WARN_ONCE(!(gops->ops.flags & FTRACE_OPS_FL_GRAPH),
gops->ops.flags &= ~FTRACE_OPS_FL_GRAPH;
if (subops->flags & FTRACE_OPS_FL_GRAPH) {