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[S390] tape: add support for irq statistics 

Add support for ccw based tape 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 12:47:33 +01:00 committed by Martin Schwidefsky
parent 3fe22f6bfd
commit b86651721f
3 changed files with 4 additions and 0 deletions
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1
arch/s390/include/asm/irq.h
View File

@ -20,6 +20,7 @@ enum interruption_class {
IOINT_DAS,
IOINT_C15,
IOINT_C70,
IOINT_TAP,
NMI_NMI,
NR_IRQS,
};

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

@ -37,6 +37,7 @@ static const struct irq_class intrclass_names[] = {
{.name = "DAS", .desc = "[I/O] DASD" },
{.name = "C15", .desc = "[I/O] 3215" },
{.name = "C70", .desc = "[I/O] 3270" },
{.name = "TAP", .desc = "[I/O] Tape" },
{.name = "NMI", .desc = "[NMI] Machine Check" },
};

2
drivers/s390/char/tape_core.c
View File

@ -14,6 +14,7 @@
#define KMSG_COMPONENT "tape"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/init.h> // for kernel parameters
#include <linux/kmod.h> // for requesting modules
@ -1114,6 +1115,7 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
struct tape_request *request;
int rc;
kstat_cpu(smp_processor_id()).irqs[IOINT_TAP]++;
device = dev_get_drvdata(&cdev->dev);
if (device == NULL) {
return;