1 files changed, 10 insertions, 0 deletions

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 899a03f2d181..fc0a147e3727 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -933,6 +933,16 @@ static int __init init_tsc_clocksource(void)
                 clocksource_tsc.rating = 0;
                 clocksource_tsc.flags &= ~CLOCK_SOURCE_IS_CONTINUOUS;
         }
+
+        /*
+         * Trust the results of the earlier calibration on systems
+         * exporting a reliable TSC.
+         */
+        if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) {
+                clocksource_register_khz(&clocksource_tsc, tsc_khz);
+                return 0;
+        }
+
         schedule_delayed_work(&tsc_irqwork, 0);
         return 0;
 }