[S390] vmur: add support for irq statistics

Add support for VMUR 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>

3 files changed, 4 insertions, 0 deletions

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index 6986343a566f..6c9b55681eab 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -21,6 +21,7 @@ enum interruption_class {
         IOINT_C15,
         IOINT_C70,
         IOINT_TAP,
+        IOINT_VMR,
         NMI_NMI,
         NR_IRQS,
 };
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 5d7b6fbb3c13..ae726d1ae430 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -38,6 +38,7 @@ static const struct irq_class intrclass_names[] = {
         {.name = "C15", .desc = "[I/O] 3215" },
         {.name = "C70", .desc = "[I/O] 3270" },
         {.name = "TAP", .desc = "[I/O] Tape" },
+        {.name = "VMR", .desc = "[I/O] Unit Record Devices" },
         {.name = "NMI", .desc = "[NMI] Machine Check" },
 };
 
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index f7e4ae6bf15a..caef1757341d 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -11,6 +11,7 @@
 #define KMSG_COMPONENT "vmur"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/kernel_stat.h>
 #include <linux/cdev.h>
 #include <linux/slab.h>
 
@@ -302,6 +303,7 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm,
 {
         struct urdev *urd;
 
+        kstat_cpu(smp_processor_id()).irqs[IOINT_VMR]++;
         TRACE("ur_int_handler: intparm=0x%lx cstat=%02x dstat=%02x res=%u\n",
               intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
               irb->scsw.cmd.count);