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Commit 792d0018 authored Feb 23, 2014 by Thomas Gleixner

genirq: Add a kstat helper to increment irq stats



There is a common pattern all over the place:

      kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));

This results in a call to core code anyway. So provide a function
which does the same thing in core.

While at it, replace the butt ugly macro with an inline.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140223212737.422068876@linutronix.de


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 02893afd

include/linux/kernel_stat.h

+7 −5

Original line number	Original line	Diff line number	Diff line
	@@ -54,11 +54,13 @@ extern unsigned long long nr_context_switches(void);
	#include <linux/irq.h>		#include <linux/irq.h>
	extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);		extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);

	#define kstat_incr_irqs_this_cpu(irqno, DESC) \		static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
	do { \		{
	__this_cpu_inc(*(DESC)->kstat_irqs); \		__this_cpu_inc(*desc->kstat_irqs);
	__this_cpu_inc(kstat.irqs_sum); \		__this_cpu_inc(kstat.irqs_sum);
	} while (0)		}

			extern void kstat_incr_irq_this_cpu(unsigned int irq);

	static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)		static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
	{		{

kernel/irq/irqdesc.c

+5 −0

Original line number	Original line	Diff line number	Diff line
	@@ -489,6 +489,11 @@ void dynamic_irq_cleanup(unsigned int irq)
	raw_spin_unlock_irqrestore(&desc->lock, flags);		raw_spin_unlock_irqrestore(&desc->lock, flags);
	}		}

			void kstat_incr_irq_this_cpu(unsigned int irq)
			{
			kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
			}

	unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)		unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
	{		{
	struct irq_desc *desc = irq_to_desc(irq);		struct irq_desc *desc = irq_to_desc(irq);