register_ftrace_command
return register_ftrace_command(&ftrace_mod_cmd);
int register_ftrace_command(struct ftrace_func_command *cmd);
ret = register_ftrace_command(&event_enable_cmd);
ret = register_ftrace_command(&event_disable_cmd);
ret = register_ftrace_command(&ftrace_cpudump_cmd);
ret = register_ftrace_command(&ftrace_traceoff_cmd);
ret = register_ftrace_command(&ftrace_traceon_cmd);
ret = register_ftrace_command(&ftrace_stacktrace_cmd);
ret = register_ftrace_command(&ftrace_dump_cmd);
return register_ftrace_command(&ftrace_snapshot_cmd);