register_ftrace_graph
extern int register_ftrace_graph(struct fgraph_ops *ops);
ret = register_ftrace_graph(&fprobe_graph_ops);
return register_ftrace_graph(&fprofiler_ops);
ret = register_ftrace_graph(tr->gops);
return register_ftrace_graph(tr->gops);
ret = register_ftrace_graph(&fgraph_ops);
ret = register_ftrace_graph(&fgraph_wakeup_ops);
ret = register_ftrace_graph(&fgraph_ops);
ret = register_ftrace_graph(&fgraph_ops);
ret = register_ftrace_graph(&fixture->gops);
ret = register_ftrace_graph(&fixture->gops);