--- arch/x86/kernel/cpu/amd.c

+++ arch/x86/kernel/cpu/amd.c

@@ -568,7 +568,7 @@ static void __cpuinit init_amd(struct cp

#endif

/* As a rule processors have APIC timer running in deep C states */

- if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400))

+ if (c->x86 > 0xf && !cpu_has_amd_erratum(amd_erratum_400))

set_cpu_cap(c, X86_FEATURE_ARAT);

/*