cpuhp_msr_state 43 arch/x86/kernel/msr.c static enum cpuhp_state cpuhp_msr_state; cpuhp_msr_state 226 arch/x86/kernel/msr.c cpuhp_msr_state = err; cpuhp_msr_state 239 arch/x86/kernel/msr.c cpuhp_remove_state(cpuhp_msr_state);