Messages in this thread | | | Date | Thu, 30 Jun 2011 09:27:20 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH] asm-generic: Raise default NR_IRQS when using sparse IRQs |
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On Wed, 29 Jun 2011, 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 high when they are > enabled. We pick 64k as there is still a bitmap of IRQs that is > allocated statically, and as we all know 64k should be enough for > anyone.
The sparse bitmap is overallocated to NR_IRQS + 8k anyway, so that's rather pointless.
> 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..0d95650 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 0xffff > +#else > #define NR_IRQS 64 > #endif > +#endif > > static inline int irq_canonicalize(int irq) > { > -- > 1.7.5.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-arch" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
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