diff --git a/[refs] b/[refs]
index 4c80b2155c3c..0357eeaef978 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 249f6d9eab372790579ada8991bba3384c204e06
+refs/heads/master: 811410fdb6b9d82a518542289efe9b2a51e3cbfb
diff --git a/trunk/include/linux/irq.h b/trunk/include/linux/irq.h
index 38bf89f2ade0..31632aa65d16 100644
--- a/trunk/include/linux/irq.h
+++ b/trunk/include/linux/irq.h
@@ -21,6 +21,10 @@ extern int nr_irqs;
 
 # define for_each_irq_desc(irq, desc)		\
 	for (irq = 0, desc = irq_desc; irq < nr_irqs; irq++, desc++)
+
+# define for_each_irq_desc_reverse(irq, desc)			\
+	for (irq = nr_irqs -1, desc = irq_desc + (nr_irqs -1 );	\
+	     irq > 0; irq--, desc--)
 #endif
 
 #ifndef CONFIG_S390