genirq: use spin_lock_irqsave instead of open coding it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/spurious.c

@@ -54,9 +54,9 @@ static int try_one_irq(int irq, struct irq_desc *desc)
 		}
 		action = action->next;
 	}
-	local_irq_disable();
+
 	/* Now clean up the flags */
-	atomic_spin_lock(&desc->lock);
+	atomic_spin_lock_irq(&desc->lock);
 	action = desc->action;
 
 	/*