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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>
hifive-unleashed-5.1
Thomas Gleixner 2014-02-23 21:40:14 +00:00
parent 02893afdd3
commit 792d0018a5
2 changed files with 12 additions and 5 deletions
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12
include/linux/kernel_stat.h
View File

@ -54,11 +54,13 @@ extern unsigned long long nr_context_switches(void);
#include <linux/irq.h>
extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
#define kstat_incr_irqs_this_cpu(irqno, DESC) \
do { \
__this_cpu_inc(*(DESC)->kstat_irqs); \
__this_cpu_inc(kstat.irqs_sum); \
} while (0)
static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
{
__this_cpu_inc(*desc->kstat_irqs);
__this_cpu_inc(kstat.irqs_sum);
}
extern void kstat_incr_irq_this_cpu(unsigned int irq);
static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
{

5
kernel/irq/irqdesc.c
View File

@ -489,6 +489,11 @@ void dynamic_irq_cleanup(unsigned int irq)
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)
{
struct irq_desc *desc = irq_to_desc(irq);