UML - Virtualized time fix

Index: linux-2.6.21-mm/arch/um/kernel/time.c
===================================================================
@@ -34,8 +34,8 @@ unsigned long long sched_clock(void)
 	return (unsigned long long)jiffies_64 * (1000000000 / HZ);
 }
 
-static unsigned long long prev_nsecs[NR_CPUS];
 #ifdef CONFIG_UML_REAL_TIME_CLOCK
+static unsigned long long prev_nsecs[NR_CPUS];
 static long long delta[NR_CPUS];		/* Deviation per interval */
 #endif
 

@@ -94,7 +94,12 @@ irqreturn_t um_timer(int irq, void *dev)
 
 	do_timer(1);
 
+#ifdef CONFIG_UML_REAL_TIME_CLOCK
 	nsecs = get_time();
+#else
+	nsecs = (unsigned long long) xtime.tv_sec * BILLION + xtime.tv_nsec +
+		BILLION / HZ;
+#endif
 	xtime.tv_sec = nsecs / NSEC_PER_SEC;
 	xtime.tv_nsec = nsecs - xtime.tv_sec * NSEC_PER_SEC;
 

@@ -127,13 +132,18 @@ void time_init(void)
 	nsecs = os_nsecs();
 	set_normalized_timespec(&wall_to_monotonic, -nsecs / BILLION,
 				-nsecs % BILLION);
+	set_normalized_timespec(&xtime, nsecs / BILLION, nsecs % BILLION);
 	late_time_init = register_timer;
 }
 
 void do_gettimeofday(struct timeval *tv)
 {
+#ifdef CONFIG_UML_REAL_TIME_CLOCK
 	unsigned long long nsecs = get_time();
-
+#else
+	unsigned long long nsecs = (unsigned long long) xtime.tv_sec * BILLION +
+		xtime.tv_nsec;
+#endif
 	tv->tv_sec = nsecs / NSEC_PER_SEC;
 	/* Careful about calculations here - this was originally done as
 	 * (nsecs - tv->tv_sec * NSEC_PER_SEC) / NSEC_PER_USEC