--- zzzz-none-000/linux-3.10.107/kernel/time/timekeeping.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/kernel/time/timekeeping.c	2021-11-10 11:53:56.000000000 +0000
@@ -171,8 +171,7 @@
 	/* calculate the delta since the last update_wall_time: */
 	cycle_delta = (cycle_now - clock->cycle_last) & clock->mask;
 
-	nsec = cycle_delta * tk->mult + tk->xtime_nsec;
-	nsec >>= tk->shift;
+	nsec = (cycle_delta * tk->mult + tk->xtime_nsec) >> tk->shift; /*--- https://bugzilla.kernel.org/show_bug.cgi?id=108991 ---*/
 
 	/* If arch requires, add in get_arch_timeoffset() */
 	return nsec + get_arch_timeoffset();