From 3fe22f6bfd6f81aafd140d69578d3a2c39674664 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Wed, 5 Jan 2011 12:47:32 +0100
Subject: [PATCH] [S390] 3270: add support for irq statistics

Add support for 3270 I/O interrupt statistics in /proc/interrupts.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/include/asm/irq.h | 1 +
 arch/s390/kernel/irq.c      | 1 +
 drivers/s390/char/raw3270.c | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index d52533df6ac8..65e63c02b0f9 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -19,6 +19,7 @@ enum interruption_class {
 	IOINT_QDI,
 	IOINT_DAS,
 	IOINT_C15,
+	IOINT_C70,
 	NMI_NMI,
 	NR_IRQS,
 };
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index e7914e4adc48..8c241416576f 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -36,6 +36,7 @@ static const struct irq_class intrclass_names[] = {
 	{.name = "QDI", .desc = "[I/O] QDIO Interrupt" },
 	{.name = "DAS", .desc = "[I/O] DASD" },
 	{.name = "C15", .desc = "[I/O] 3215" },
+	{.name = "C70", .desc = "[I/O] 3270" },
 	{.name = "NMI", .desc = "[NMI] Machine Check" },
 };
 
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 2a4c566456e7..96ba2fd1c8ad 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -7,6 +7,7 @@
  *     Copyright IBM Corp. 2003, 2009
  */
 
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -329,6 +330,7 @@ raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
 	struct raw3270_request *rq;
 	int rc;
 
+	kstat_cpu(smp_processor_id()).irqs[IOINT_C70]++;
 	rp = dev_get_drvdata(&cdev->dev);
 	if (!rp)
 		return;