perf_guest_info_callbacks  717 include/linux/perf_event.h extern struct perf_guest_info_callbacks *perf_guest_cbs;
perf_guest_info_callbacks  718 include/linux/perf_event.h extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
perf_guest_info_callbacks  719 include/linux/perf_event.h extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
perf_guest_info_callbacks  824 include/linux/perf_event.h (struct perf_guest_info_callbacks *callbacks)				{ return 0; }
perf_guest_info_callbacks  826 include/linux/perf_event.h (struct perf_guest_info_callbacks *callbacks)				{ return 0; }