[RFC PATCH 19/24] hack: Define constant IRQ_BITMAP_BITS independent of NR_IRQS

[Nicolas Pitre]

On Tue, 23 Aug 2011, Venkatraman S wrote:

> From: Venkatraman S <venkat at linaro.org>
> 
> Currently a hack. Need to define a polite way of defining
> IRQ_BITMAP_BITS
> 
> Signed-off-by: Venkatraman S <venkat at linaro.org>

Well... given how IRQ_BITMAP_BITS is used, it looks like simply having a 
sufficiently high number is all that is needed.  The current value 
appears to be totally arbitrary (and having 8196 instead of 8192 there 
is rather odd).  So I think this shouldn't need to be defined in terms 
of NR_IRQS at all in fact.


> ---
>  kernel/irq/internals.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
> index 6546431..60db644 100644
> --- a/kernel/irq/internals.h
> +++ b/kernel/irq/internals.h
> @@ -8,7 +8,7 @@
>  #include <linux/irqdesc.h>
>  
>  #ifdef CONFIG_SPARSE_IRQ
> -# define IRQ_BITMAP_BITS	(NR_IRQS + 8196)
> +# define IRQ_BITMAP_BITS	(512 + 8196)
>  #else
>  # define IRQ_BITMAP_BITS	NR_IRQS
>  #endif
> -- 
> 1.7.1
>