linux-kernel - [PATCH 13/14] kernel/irq/spurious.c: Use time

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Message-Id: <1203003412-11594-14-git-send-email-caglar@pardus.org.tr>
Date:	Thu, 14 Feb 2008 17:36:51 +0200
From:	S.Çağlar Onur <caglar@...dus.org.tr>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	S.Çağlar Onur <caglar@...dus.org.tr>
Subject: [PATCH 13/14] kernel/irq/spurious.c: Use time_* macros

The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values.

So following patch implements usage of the time_after() macro, defined at linux/jiffies.h, which deals with wrapping correctly

Cc: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: S.Çağlar Onur <caglar@...dus.org.tr>
---
 kernel/irq/spurious.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index a6b2bc8..088dabb 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -6,6 +6,7 @@
  * This file contains spurious interrupt handling.
  */
 
+#include <linux/jiffies.h>
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/kallsyms.h>
@@ -179,7 +180,7 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
 		 * otherwise the couter becomes a doomsday timer for otherwise
 		 * working systems
 		 */
-		if (jiffies - desc->last_unhandled > HZ/10)
+		if (time_after(jiffies, desc->last_unhandled + HZ/10))
 			desc->irqs_unhandled = 1;
 		else
 			desc->irqs_unhandled++;
-- 
1.5.3.7

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