--- zzzz-none-000/linux-3.10.107/arch/mips/kernel/time.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/arch/mips/kernel/time.c	2021-11-10 11:53:54.000000000 +0000
@@ -121,6 +121,14 @@
 {
 	plat_time_init();
 
-	if (!mips_clockevent_init() || !cpu_has_mfc0_count_bug())
+	/*
+	 * The use of the R4k timer as a clock event takes precedence;
+	 * if reading the Count register might interfere with the timer
+	 * interrupt, then we don't use the timer as a clock source.
+	 * We may still use the timer as a clock source though if the
+	 * timer interrupt isn't reliable; the interference doesn't
+	 * matter then, because we don't use the interrupt.
+	 */
+	if (mips_clockevent_init() != 0 || !cpu_has_mfc0_count_bug())
 		init_mips_clocksource();
 }