diff -Nraup linux-2.6.9-rc1/kernel/timer.c linux-2.6.9-rc1_fix/kernel/timer.c
--- linux-2.6.9-rc1/kernel/timer.c	2004-08-25 12:09:36.648303832 +0800
+++ linux-2.6.9-rc1_fix/kernel/timer.c	2004-08-25 12:10:34.186389064 +0800
@@ -1446,11 +1446,13 @@ is_better_time_interpolator(struct time_
 void
 register_time_interpolator(struct time_interpolator *ti)
 {
+	unsigned long	flags;
+
 	spin_lock(&time_interpolator_lock);
-	write_seqlock_irq(&xtime_lock);
+	write_seqlock_irqsave(&xtime_lock, flags);
 	if (is_better_time_interpolator(ti))
 		time_interpolator = ti;
-	write_sequnlock_irq(&xtime_lock);
+	write_sequnlock_irqrestore(&xtime_lock, flags);
 
 	ti->next = time_interpolator_list;
 	time_interpolator_list = ti;
@@ -1461,6 +1463,7 @@ void
 unregister_time_interpolator(struct time_interpolator *ti)
 {
 	struct time_interpolator *curr, **prev;
+	unsigned long	flags;
 
 	spin_lock(&time_interpolator_lock);
 	prev = &time_interpolator_list;
@@ -1472,7 +1475,7 @@ unregister_time_interpolator(struct time
 		prev = &curr->next;
 	}
 
-	write_seqlock_irq(&xtime_lock);
+	write_seqlock_irqsave(&xtime_lock, flags);
 	if (ti == time_interpolator) {
 		/* we lost the best time-interpolator: */
 		time_interpolator = NULL;
@@ -1481,7 +1484,7 @@ unregister_time_interpolator(struct time
 			if (is_better_time_interpolator(curr))
 				time_interpolator = curr;
 	}
-	write_sequnlock_irq(&xtime_lock);
+	write_sequnlock_irqrestore(&xtime_lock, flags);
 	spin_unlock(&time_interpolator_lock);
 }
 #endif /* CONFIG_TIME_INTERPOLATION */