x86: Avoid check hlt for newer cpus
Check hlt instruction was targeted for some older CPUs. It is an expensive operation in that it takes 4 ticks to break out the check. We can avoid such check completely for newer x86 cpus (family >= 5). [ hpa: corrected family > 5 to family >= 5 ] Signed-off-by: NJacob Pan <jacob.jun.pan@linux.intel.com> LKML-Reference: <1273269585-14346-1-git-send-email-jacob.jun.pan@linux.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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