From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 16 Oct 2008 12:16:11 +0000 (+0200)
Subject: genirq: add reverse iterator for irq_desc
X-Git-Tag: v2.6.28-rc1~80^2~7
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=811410fdb6b9d82a518542289efe9b2a51e3cbfb;p=linux-2.6-omap-h63xx.git

genirq: add reverse iterator for irq_desc

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

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 38bf89f2ade..31632aa65d1 100644
--- a/include/linux/irq.h
+++ b/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