CPUHP_PERF_X86_PREPARE 1847 arch/x86/events/core.c err = cpuhp_setup_state(CPUHP_PERF_X86_PREPARE, "perf/x86:prepare", CPUHP_PERF_X86_PREPARE 1874 arch/x86/events/core.c cpuhp_remove_state(CPUHP_PERF_X86_PREPARE);