linux-kernel - [PATCH V2 1/2] genirq: Add an accessor for IRQ_PER

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Date:	Wed, 13 Nov 2013 16:35:24 +0530
From:	Vinayak Kale <vkale@....com>
To:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:	tglx@...utronix.de, will.deacon@....com, patches@....com,
	jcm@...hat.com, Vinayak Kale <vkale@....com>
Subject: [PATCH V2 1/2] genirq: Add an accessor for IRQ_PER_CPU flag

This patch adds an accessor function for IRQ_PER_CPU flag.
The accessor function is useful to dertermine whether an IRQ is percpu or not.

Signed-off-by: Vinayak Kale <vkale@....com>
---
 include/linux/irqdesc.h |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index 56fb646..acd8a3f 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -152,6 +152,14 @@ static inline int irq_balancing_disabled(unsigned int irq)
 	return desc->status_use_accessors & IRQ_NO_BALANCING_MASK;
 }
 
+static inline int irq_is_percpu(unsigned int irq)
+{
+	struct irq_desc *desc;
+
+	desc = irq_to_desc(irq);
+	return (desc && (desc->status_use_accessors & IRQ_PER_CPU)) ? 1 : 0;
+}
+
 static inline void
 irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)
 {
-- 
1.7.9.5

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