From 85b81cdd0b038d580dedf6289df7de65826967d6 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Wed, 5 Jan 2011 12:47:37 +0100
Subject: [S390] ctc: add support for irq statistics

Add support for CTC 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>

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index 2d5943c..8c79f94 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -24,6 +24,7 @@ enum interruption_class {
 	IOINT_VMR,
 	IOINT_LCS,
 	IOINT_CLW,
+	IOINT_CTC,
 	NMI_NMI,
 	NR_IRQS,
 };
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 406b539..57ed2b5 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -41,6 +41,7 @@ static const struct irq_class intrclass_names[] = {
 	{.name = "VMR", .desc = "[I/O] Unit Record Devices" },
 	{.name = "LCS", .desc = "[I/O] LCS" },
 	{.name = "CLW", .desc = "[I/O] CLAW" },
+	{.name = "CTC", .desc = "[I/O] CTC" },
 	{.name = "NMI", .desc = "[NMI] Machine Check" },
 };
 
diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
index 2c7d2d9..4c28459 100644
--- a/drivers/s390/net/ctcm_main.c
+++ b/drivers/s390/net/ctcm_main.c
@@ -24,6 +24,7 @@
 #define KMSG_COMPONENT "ctcm"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -1204,6 +1205,7 @@ static void ctcm_irq_handler(struct ccw_device *cdev,
 	int cstat;
 	int dstat;
 
+	kstat_cpu(smp_processor_id()).irqs[IOINT_CTC]++;
 	CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
 		"Enter %s(%s)", CTCM_FUNTAIL, dev_name(&cdev->dev));
 
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