[S390] dasd: add support for irq statistics

Add support for DASD 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>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index fb613d70c2cb..faa7d425cb9c 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -11,6 +11,7 @@
 #define KMSG_COMPONENT "dasd"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/kernel_stat.h>
 #include <linux/kmod.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -1076,6 +1077,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
         unsigned long long now;
         int expires;
 
+        kstat_cpu(smp_processor_id()).irqs[IOINT_DAS]++;
         if (IS_ERR(irb)) {
                 switch (PTR_ERR(irb)) {
                 case -EIO: