1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h
index f7ac48d2edf5..e9660e52dc09 100644
--- a/include/linux/timekeeper_internal.h
+++ b/include/linux/timekeeper_internal.h
@@ -90,6 +90,15 @@ struct timekeeper {
         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;