Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 29 Nov 2010 23:02:53 +0300 | From | Pavel Vasilyev <> | Subject | Re: [PATCH] asm-generic: Raise default NR_IRQS when using sparse IRQs |
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On 29.11.2010 22:20, 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. > > 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) > {
May be
#define NR_IRQS 15*NR_CPUS
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