[RFC PATCH v1 3/9] genirq: Introduce irq_is_percpu_devid()

[Paul Burton <paul.burton@imgtec.com>]

In preparation for allowing code to handle both percpu_devid interrupts
using the percpu interrupt APIs, and non-percpu_devid but still percpu
interrupts with the regular interrupt APIs, introduce a new
irq_is_percpu_devid() helper function to allow callers to check whether
an interrupt has the IRQ_PER_CPU_DEVID flag set.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
---

 include/linux/irqdesc.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index 3e90a094798d..93960cf36e23 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -244,6 +244,14 @@ static inline int irq_is_percpu(unsigned int irq)
 	return desc->status_use_accessors & IRQ_PER_CPU;
 }
 
+static inline int irq_is_percpu_devid(unsigned int irq)
+{
+	struct irq_desc *desc;
+
+	desc = irq_to_desc(irq);
+	return desc->status_use_accessors & IRQ_PER_CPU_DEVID;
+}
+
 static inline void
 irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)
 {
-- 
2.14.1