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 determine whether an IRQ is percpu or not.
This patch is based on an older patch posted by Chris Smith here [1].
There is a minor change w.r.t. Chris's original patch: The accessor function
is renamed as 'irq_is_percpu' instead of 'irq_is_per_cpu'.
[1]: http://lkml.indiana.edu/hypermail/linux/kernel/1207.3/02955.html
Signed-off-by: Chris Smith <chris.smith@st.com>
Signed-off-by: Vinayak Kale <vkale@apm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index 56fb646..26e2661 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -152,6 +152,14 @@
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->status_use_accessors & IRQ_PER_CPU;
+}
+
static inline void
irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)
{