initialize hostFeatureSet from init function

pkg/cpuid/cpuid.go

@@ -43,7 +43,7 @@ func HostFeatureSet() *FeatureSet {
 	return hostFeatureSet
 }
 
-var hostFeatureSet = getHostFeatureSet()
+var hostFeatureSet *FeatureSet
 
 // ErrIncompatible is returned by FeatureSet.HostCompatible if fs is not a
 // subset of the host feature set.

pkg/cpuid/cpuid_x86.go

@@ -1109,4 +1109,5 @@ func initFeaturesFromString() {
 func init() {
 	initCPUFreq()
 	initFeaturesFromString()
+	hostFeatureSet = getHostFeatureSet()
 }