x86: Implement support to synchronize RDTSC with LFENCE on Intel CPUs

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / cpu / intel.c

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index e4b7e73e9024a08f06fb0330e5bb693514bf4ef0..0a4abdb61ae4e3a89fd8ed5dbda1f0dd37279e24 100644 (file)
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -203,9 +203,10 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
        }
 #endif
 
+       if (cpu_has_xmm)
+               set_bit(X86_FEATURE_LFENCE_RDTSC, c->x86_capability);
        if (c->x86 == 15) {
                set_bit(X86_FEATURE_P4, c->x86_capability);
-               set_bit(X86_FEATURE_SYNC_RDTSC, c->x86_capability);
        }
        if (c->x86 == 6) 
                set_bit(X86_FEATURE_P3, c->x86_capability);