genirq: add interrupt statistics for NMIs

hulk inclusion
category: feature
bugzilla: 9290
CVE: NA

Add interrupt statistics for NMIs, as we can get NMI counters on the
x86 machine in /proc/interrputs.

-------------------------------------------------
Signed-off-by: NWei Li <liwei391@huawei.com>
Reviewed-by: NHanjun Guo <guohanjun@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

kernel/irq/chip.c

@@ -748,6 +748,7 @@ void handle_fasteoi_nmi(struct irq_desc *desc)
 	unsigned int irq = irq_desc_get_irq(desc);
 	irqreturn_t res;
 
+	kstat_incr_irqs_this_cpu(desc);
 	trace_irq_handler_entry(irq, action);
 	/*
 	 * NMIs cannot be shared, there is only one action.
@@ -954,6 +955,7 @@ void handle_percpu_devid_fasteoi_nmi(struct irq_desc *desc)
 	unsigned int irq = irq_desc_get_irq(desc);
 	irqreturn_t res;
 
+	kstat_incr_irqs_this_cpu(desc);
 	trace_irq_handler_entry(irq, action);
 	res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
 	trace_irq_handler_exit(irq, action, res);