[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>
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@ -17,6 +17,7 @@ enum interruption_class {
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EXTINT_IUC,
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IOINT_QAI,
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IOINT_QDI,
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IOINT_DAS,
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NMI_NMI,
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NR_IRQS,
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};
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@ -34,6 +34,7 @@ static const struct irq_class intrclass_names[] = {
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{.name = "IUC", .desc = "[EXT] IUCV" },
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{.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt" },
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{.name = "QDI", .desc = "[I/O] QDIO Interrupt" },
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{.name = "DAS", .desc = "[I/O] DASD" },
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{.name = "NMI", .desc = "[NMI] Machine Check" },
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};
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@ -11,6 +11,7 @@
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#define KMSG_COMPONENT "dasd"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/kernel_stat.h>
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#include <linux/kmod.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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@ -1076,6 +1077,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
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unsigned long long now;
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int expires;
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kstat_cpu(smp_processor_id()).irqs[IOINT_DAS]++;
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if (IS_ERR(irb)) {
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switch (PTR_ERR(irb)) {
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case -EIO:
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