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>

1 files changed, 7 insertions, 5 deletions

diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 51c72be4a7c3..54ec7e0a7d72 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -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)
 {