Commit 3283942b authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[S390] dasd: add support for irq statistics 



Add support for DASD I/O interrupt statistics in /proc/interrupts.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 30d77c3e

arch/s390/include/asm/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ enum interruption_class { 
	EXTINT_IUC,

	IOINT_QAI,

	IOINT_QDI,

	IOINT_DAS,

	NMI_NMI,

	NR_IRQS,

};

arch/s390/kernel/irq.c

+1 −0
Original line number Diff line number Diff line
@@ -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" },

};

drivers/s390/block/dasd.c

+2 −0
Original line number Diff line number Diff line
@@ -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: