Messages in this thread | | | Date | Wed, 24 Nov 2010 16:45:03 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH] asm-generic: Raise default NR_IRQS when using sparse IRQs |
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On Wed, 24 Nov 2010, Mark Brown wrote:
> Rather than have each platform using sparse IRQs pick a suitably large > NR_IRQS for use with sparse IRQs make the default exceptionally high > when they are enabled. > > Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> > --- > include/asm-generic/irq.h | 6 +++++- > 1 files changed, 5 insertions(+), 1 deletions(-) > > diff --git a/include/asm-generic/irq.h b/include/asm-generic/irq.h > index b90ec0b..a76bea2 100644 > --- a/include/asm-generic/irq.h > +++ b/include/asm-generic/irq.h > @@ -4,11 +4,15 @@ > /* > * NR_IRQS is the upper bound of how many interrupts can be handled > * in the platform. It is used to size the static irq_map array, > - * so don't make it too big. > + * so don't make it too big unless we're using sparse IRQs. > */ > #ifndef NR_IRQS > +#ifdef CONFIG_SPARSE_IRQ > +#define NR_IRQS 0x7fffffff
Resulting in a 256 MB bitmap. I guess you did not try to boot that on some random ARM board :)
Thanks,
tglx
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