[PATCH 1/2] genirq: Provide an accessor for IRQ_PER_CPU flag.

From: Chris Smith
Date: Mon Jul 30 2012 - 10:31:55 EST

Adds an accessor function, irq_is_per_cpu(), for the flag IRQ_PER_CPU.

This is useful if you have an IRQ that is per-cpu in some hardware
implementations, and not in others (example: ARM PMU Interrupts), and
you want to handle both cases.

Signed-off-by: Chris Smith <chris.smith@xxxxxx>
include/linux/irqdesc.h | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index f1e2527..771cb35 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -154,6 +154,14 @@ static inline int irq_balancing_disabled(unsigned int irq)
return desc->status_use_accessors & IRQ_NO_BALANCING_MASK;

+static inline int irq_is_per_cpu(unsigned int irq)
+ struct irq_desc *desc;
+ desc = irq_to_desc(irq);
+ return desc->status_use_accessors & IRQ_PER_CPU;
static inline void
irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)

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