diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h
index f7ac48d..e9660e5 100644
--- a/include/linux/timekeeper_internal.h
+++ b/include/linux/timekeeper_internal.h
@@ -90,6 +90,15 @@
 	u64			xtime_interval;
 	s64			xtime_remainder;
 	u32			raw_interval;
+	/* The ntp_tick_length() value currently being used.
+	 * This cached copy ensures we consistently apply the tick
+	 * length for an entire tick, as ntp_tick_length may change
+	 * mid-tick, and we don't want to apply that new value to
+	 * the tick in progress.
+	 */
+	u64			ntp_tick;
+	/* Difference between accumulated time and NTP time in ntp
+	 * shifted nano seconds. */
 	s64			ntp_error;
 	u32			ntp_error_shift;
 	u32			ntp_err_mult;
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 43c706a..f36b028 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -171,6 +171,7 @@
 
 	tk->ntp_error = 0;
 	tk->ntp_error_shift = NTP_SCALE_SHIFT - clock->shift;
+	tk->ntp_tick = ntpinterval << tk->ntp_error_shift;
 
 	/*
 	 * The timekeeper keeps its own mult values for the currently
@@ -1352,6 +1353,8 @@
 	if (tk->ntp_err_mult)
 		xinterval -= tk->cycle_interval;
 
+	tk->ntp_tick = ntp_tick_length();
+
 	/* Calculate current error per tick */
 	tick_error = ntp_tick_length() >> tk->ntp_error_shift;
 	tick_error -= (xinterval + tk->xtime_remainder);
@@ -1497,7 +1500,7 @@
 	tk->raw_time.tv_nsec = raw_nsecs;
 
 	/* Accumulate error between NTP and clock interval */
-	tk->ntp_error += ntp_tick_length() << shift;
+	tk->ntp_error += tk->ntp_tick << shift;
 	tk->ntp_error -= (tk->xtime_interval + tk->xtime_remainder) <<
 						(tk->ntp_error_shift + shift);