--- zzzz-none-000/linux-4.9.279/kernel/time/timekeeping.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/kernel/time/timekeeping.c	2023-02-08 11:43:43.000000000 +0000
@@ -1492,7 +1492,11 @@
 	unsigned long flags;
 	struct timespec64 now, boot, tmp;
 
-	read_persistent_clock64(&now);
+	if (IS_ENABLED(CONFIG_TIME_ALWAYS_BOOT_AT_EPOCH))
+		now = (struct timespec64) {};
+	else
+		read_persistent_clock64(&now);
+
 	if (!timespec64_valid_strict(&now)) {
 		pr_warn("WARNING: Persistent clock returned invalid value!\n"
 			"         Check your CMOS/BIOS settings.\n");