1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index a62c201c97ec..183c5925a9fe 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -620,7 +620,8 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
 
         if (cpu_khz) {
                 *scale = (NSEC_PER_MSEC << CYC2NS_SCALE_FACTOR)/cpu_khz;
-                *offset = ns_now - (tsc_now * *scale >> CYC2NS_SCALE_FACTOR);
+                *offset = ns_now - mult_frac(tsc_now, *scale,
+                                             (1UL << CYC2NS_SCALE_FACTOR));
         }
 
         sched_clock_idle_wakeup_event(0);