s390/eadm_sch: add support for irq statistics

Add support for EADM interrupt statistics in /proc/interrupts.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

3 files changed, 5 insertions, 0 deletions

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index 2b9d41899d21..33cc59071581 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -30,6 +30,7 @@ enum interruption_class {
         IOINT_CLW,
         IOINT_CTC,
         IOINT_APB,
+        IOINT_ADM,
         IOINT_CSC,
         NMI_NMI,
         NR_IRQS,
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index dd7630d8aab7..a22fdca6a663 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -55,6 +55,7 @@ static const struct irq_class intrclass_names[] = {
         {.name = "CLW", .desc = "[I/O] CLAW" },
         {.name = "CTC", .desc = "[I/O] CTC" },
         {.name = "APB", .desc = "[I/O] AP Bus" },
+        {.name = "ADM", .desc = "[I/O] EADM Subchannel" },
         {.name = "CSC", .desc = "[I/O] CHSC Subchannel" },
         {.name = "NMI", .desc = "[NMI] Machine Check" },
 };
diff --git a/drivers/s390/cio/eadm_sch.c b/drivers/s390/cio/eadm_sch.c
index 3fc882f66689..6c9673400464 100644
--- a/drivers/s390/cio/eadm_sch.c
+++ b/drivers/s390/cio/eadm_sch.c
@@ -5,6 +5,7 @@
  * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com>
  */
 
+#include <linux/kernel_stat.h>
 #include <linux/workqueue.h>
 #include <linux/spinlock.h>
 #include <linux/device.h>
@@ -138,6 +139,8 @@ static void eadm_subchannel_irq(struct subchannel *sch)
         EADM_LOG(6, "irq");
         EADM_LOG_HEX(6, irb, sizeof(*irb));
 
+        kstat_cpu(smp_processor_id()).irqs[IOINT_ADM]++;
+
         if ((scsw->stctl & (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))
             && scsw->eswf == 1 && irb->esw.eadm.erw.r)
                 error = -EIO;