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[S390] dasd: add support for irq statistics

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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>
This commit is contained in:
Heiko Carstens 2011-01-05 12:47:30 +01:00 committed by Martin Schwidefsky
parent 30d77c3e1c
commit 3283942b71
3 changed files with 4 additions and 0 deletions
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1
arch/s390/include/asm/irq.h
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@ -17,6 +17,7 @@ enum interruption_class {
EXTINT_IUC,
IOINT_QAI,
IOINT_QDI,
IOINT_DAS,
NMI_NMI,
NR_IRQS,
};

1
arch/s390/kernel/irq.c
View file

@ -34,6 +34,7 @@ static const struct irq_class intrclass_names[] = {
{.name = "IUC", .desc = "[EXT] IUCV" },
{.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt" },
{.name = "QDI", .desc = "[I/O] QDIO Interrupt" },
{.name = "DAS", .desc = "[I/O] DASD" },
{.name = "NMI", .desc = "[NMI] Machine Check" },
};

2
drivers/s390/block/dasd.c
View file

@ -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: