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s390/irq: count cpu restart events 

Count CPU Restart events and make them visible via /proc/interrupts.
Every CPU hotplug (online) event will increase the per cpu counter.

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 2013-01-02 16:54:12 +01:00 committed by Martin Schwidefsky
parent 420f42ecf4
commit 93f3b2ee0a
3 changed files with 3 additions and 0 deletions
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1
arch/s390/include/asm/irq.h
View File

@ -42,6 +42,7 @@ enum interruption_class {
IRQIO_PCI,
IRQIO_MSI,
NMI_NMI,
CPU_RST,
NR_ARCH_IRQS
};

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

@ -82,6 +82,7 @@ static const struct irq_class irqclass_sub_desc[NR_ARCH_IRQS] = {
[IRQIO_PCI] = {.name = "PCI", .desc = "[I/O] PCI Interrupt" },
[IRQIO_MSI] = {.name = "MSI", .desc = "[I/O] MSI Interrupt" },
[NMI_NMI] = {.name = "NMI", .desc = "[NMI] Machine Check"},
[CPU_RST] = {.name = "RST", .desc = "[CPU] CPU Restart"},
};
/*

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

@ -709,6 +709,7 @@ static void __cpuinit smp_start_secondary(void *cpuvoid)
pfault_init();
notify_cpu_starting(smp_processor_id());
set_cpu_online(smp_processor_id(), true);
inc_irq_stat(CPU_RST);
local_irq_enable();
/* cpu_idle will call schedule for us */
cpu_idle();