Index: linux-2.6.15/kernel/itimer.c
===================================================================
--- linux-2.6.15.orig/kernel/itimer.c	2006-01-27 16:11:33.000000000 +0100
+++ linux-2.6.15/kernel/itimer.c	2006-01-27 17:01:54.000000000 +0100
@@ -151,12 +151,12 @@ int do_setitimer(int which, struct itime
 	switch (which) {
 	case ITIMER_REAL:
 		timer = &tsk->signal->real_timer;
-		hrtimer_cancel(timer);
 		if (ovalue) {
 			ovalue->it_value = itimer_get_remtime(timer);
 			ovalue->it_interval
 				= ktime_to_timeval(tsk->signal->it_real_incr);
 		}
+		hrtimer_cancel(timer);
 		tsk->signal->it_real_incr =
 			timeval_to_ktime(value->it_interval);
 		expires = timeval_to_ktime(value->it_value);