[PATCH V2 1/2] genirq: Add an accessor for IRQ_PER_CPU flag
From: Marc Zyngier <hidden>
Date: 2013-11-13 14:08:22
Also in:
lkml
Hi Vinayak, On 13/11/13 11:05, Vinayak Kale wrote:
quoted hunk ↗ jump to hunk
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 <redacted> --- 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;
I don't think it is worth checking for the validity of "desc" here. All the other accessors assume that you've not passed a stupid "irq" value. Simply having return !!(desc->status_use_accessors & IRQ_PER_CPU); should be enough.
+}
+
static inline void
irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)
{Cheers, M. -- Jazz is not dead. It just smells funny...