1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/kernel/pvclock.c b/arch/x86/kernel/pvclock.c
index f5bc40e1697e..239427ca02af 100644
--- a/arch/x86/kernel/pvclock.c
+++ b/arch/x86/kernel/pvclock.c
@@ -135,6 +135,10 @@ cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src)
                 barrier();
         } while (version != src->version);
 
+        if ((valid_flags & PVCLOCK_TSC_STABLE_BIT) &&
+                (shadow.flags & PVCLOCK_TSC_STABLE_BIT))
+                return ret;
+
         /*
          * Assumption here is that last_value, a global accumulator, always goes
          * forward. If we are less than that, we should not be much smaller.