1 files changed, 6 insertions, 2 deletions

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 7603c055390..8e786b0d665 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -104,7 +104,7 @@ __setup("notsc", notsc_setup);
 /*
  * Read TSC and the reference counters. Take care of SMI disturbance
  */
-static u64 __init tsc_read_refs(u64 *pm, u64 *hpet)
+static u64 tsc_read_refs(u64 *pm, u64 *hpet)
 {
         u64 t1, t2;
         int i;
@@ -314,7 +314,7 @@ static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
                         mark_tsc_unstable("cpufreq changes");
         }
 
-        set_cyc2ns_scale(tsc_khz_ref, freq->cpu);
+        set_cyc2ns_scale(tsc_khz, freq->cpu);
 
         return 0;
 }
@@ -325,6 +325,10 @@ static struct notifier_block time_cpufreq_notifier_block = {
 
 static int __init cpufreq_tsc(void)
 {
+        if (!cpu_has_tsc)
+                return 0;
+        if (boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
+                return 0;
         cpufreq_register_notifier(&time_cpufreq_notifier_block,
                                 CPUFREQ_TRANSITION_NOTIFIER);
         return 0;