[ACPI] fix C1 patch for IA64
http://bugzilla.kernel.org/show_bug.cgi?id=4233

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index ebb71f3..a9bfba4 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -195,6 +195,7 @@
 void
 default_idle (void)
 {
+	local_irq_enable();
 	while (!need_resched())
 		if (can_do_pal_halt)
 			safe_halt();