diff options
Diffstat (limited to 'arch/x86/kernel/setup_64.c')
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index 02409100f456..2139aa6ac469 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -746,8 +746,8 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11) set_cpu_cap(c, X86_FEATURE_K8); - /* RDTSC can be speculated around */ - clear_cpu_cap(c, X86_FEATURE_SYNC_RDTSC); + /* MFENCE stops RDTSC speculation */ + set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC); /* Family 10 doesn't support C states in MWAIT so don't use it */ if (c->x86 == 0x10 && !force_mwait) |