[RESEND PATCH 1/2] irqdesc: Add function to identify percpu_devid irqs

[Will Deacon]

Hi Thomas,

I was hoping to merge this one via arm64 since it now has Marc's
Reviewed-by, but I'd really like your Ack on it too, if you don't mind.

Could you take a look, please?

Thanks,

Will

On Fri, Oct 13, 2017 at 06:44:23PM +0100, Mark Rutland wrote:
> Would you be happy for this patch to be taken via the arm64 tree?
> 
> The next patch [1] makes use of this in the arm_pmu driver, and we're
> likely to have some other changes there shortly.
> 
> Thanks,
> Mark
> 
> [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2017-October/536532.html
> 
> On Fri, Oct 13, 2017 at 12:26:44PM +0100, Julien Thierry wrote:
> > irq_is_percpu indicates whether an irq should only target a single cpu.
> > PERCPU_DEVID flag indicates that an irq can be configured differently on
> > each cpu it can target.
> > 
> > Provide a function to check whether an irq is PERCPU_DEVID.
> > 
> > Signed-off-by: Julien Thierry <julien.thierry at arm.com>
> > Cc: Thomas Gleixner <tglx at linutronix.de>
> > Cc: Marc Zyngier <marc.zyngier at arm.com>
> > ---
> >  include/linux/irqdesc.h | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
> > index 3e90a09..93960cf 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)
> >  {
> > --
> > 1.9.1