--- zzzz-none-000/linux-2.6.32.61/kernel/irq/handle.c	2013-06-10 09:43:48.000000000 +0000
+++ ar10-7272-687/linux-2.6.32.61/kernel/irq/handle.c	2013-02-12 11:41:54.000000000 +0000
@@ -424,7 +424,13 @@
 		action = action->next;
 	} while (action);
 
-	add_interrupt_randomness(irq, flags);
+    /*--------------------------------------------------------------------------------*\
+     * mbahr: aus performanec-Gruenden randomness nur bei ausgewaehlten Interrupts 
+     * (identisch mit 2.6.41)
+    \*--------------------------------------------------------------------------------*/
+	if (flags & IRQF_SAMPLE_RANDOM) {
+        add_interrupt_randomness(irq, flags);
+    }
 	local_irq_disable();
 
 	return retval;
@@ -447,7 +453,12 @@
  * This is the original x86 implementation which is used for every
  * interrupt type.
  */
+
+#ifdef CONFIG_LTQ_SYS_OPT
+unsigned int __system __do_IRQ(unsigned int irq) 
+#else
 unsigned int __do_IRQ(unsigned int irq)
+#endif
 {
 	struct irq_desc *desc = irq_to_desc(irq);
 	struct irqaction *action;
@@ -557,4 +568,3 @@
 	return desc ? desc->kstat_irqs[cpu] : 0;
 }
 EXPORT_SYMBOL(kstat_irqs_cpu);
-