On Thu, 17 Sep 2015, Marc Zyngier wrote:
> On 17/09/15 06:19, Yang Yingliang wrote:
> > Add move_irqs() into kernel/irq/migration.c.
> > So we can use it to migrate interrupts, when
> > cpu is offline.
> >
> > Cc: Jiang Liu <[email protected]>
> > Cc: Thomas Gleixner <[email protected]>
> > Cc: Marc Zyngier <[email protected]>
> > Cc: Mark Rutland <[email protected]>
> > Cc: Will Deacon <[email protected]>
> > Cc: Russell King - ARM Linux <[email protected]>
> > Cc: Hanjun Guo <[email protected]>
> > Signed-off-by: Yang Yingliang <[email protected]>
> > ---
> > include/linux/irq.h | 4 +++
> > kernel/irq/migration.c | 66
> > ++++++++++++++++++++++++++++++++++++++++++++++++++
> > 2 files changed, 70 insertions(+)
> >
> > diff --git a/include/linux/irq.h b/include/linux/irq.h
> > index 6f8b340..64e3a02 100644
> > --- a/include/linux/irq.h
> > +++ b/include/linux/irq.h
> > @@ -446,6 +446,10 @@ static inline void irq_move_irq(struct irq_data *data)
> > { }
> > static inline void irq_move_masked_irq(struct irq_data *data) { }
> > #endif
> >
> > +#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_IRQ_MIGRATION) &&
> > defined(CONFIG_HOTPLUG_CPU)
> > +void move_irqs(void);
> > +#endif
> > +
>
> I don't think having this prototype guarded by this #if is very useful.
> You can probably leave it standalone.
Yes, there is no point if the function name is unique. Though
move_irqs() is rather undescriptive. irq_break_affinities() might
describe it quite well, but feel free to come up with soemthing better.
Thanks,
tglx
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