Fix build failure with gcc 4.3

  LD      .tmp_vmlinux1
arch/x86/kernel/built-in.o: In function `timer_interrupt':
/data/work/linux-2.6.27/linux-2.6/arch/x86/kernel/time_32-xen.c:467: undefined reference to `__udivdi3'

diff --git a/arch/x86/kernel/time_32-xen.c b/arch/x86/kernel/time_32-xen.c
index aa7e6a8..d61b20f 100644
--- a/arch/x86/kernel/time_32-xen.c
+++ b/arch/x86/kernel/time_32-xen.c
@@ -519,6 +519,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id)
 		do_div(delta, NS_PER_TICK);
 		processed_system_time += delta * NS_PER_TICK;
 		while (delta > HZ) {
+			clobber_induction_variable(delta) ;
 			do_timer(HZ);
 			delta -= HZ;
 		}