X86_FEATURE_APIC_MSRS_FENCE
alternative("mfence; lfence", "", ALT_NOT(X86_FEATURE_APIC_MSRS_FENCE));
clear_cpu_cap(c, X86_FEATURE_APIC_MSRS_FENCE);
set_cpu_cap(c, X86_FEATURE_APIC_MSRS_FENCE);
clear_cpu_cap(c, X86_FEATURE_APIC_MSRS_FENCE);