[IA64] - Allow IPIs in timer loop

Allow pending IPIs to interrupt a timer interrupt that is looping
in the do_timer() "while" loop in timer_interrupt(). (Interrupts are
allowed at only 1 spot in the code).

Signed-off-by: Jack Steiner <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/kernel/time.c

···
 
 		if (time_after(new_itm, ia64_get_itc()))
 			break;
+
+		/*
+		 * Allow IPIs to interrupt the timer loop.
+		 */
+		local_irq_enable();
+		local_irq_disable();
 	}
 
 	do {