From mboxrd@z Thu Jan  1 00:00:00 1970
From: schwab@linux-m68k.org (Andreas Schwab)
Date: Thu, 05 Apr 2012 12:51:27 +0200
Subject: [PATCH v5 06/27] irq_domain/powerpc: eliminate irq_map;
 use irq_alloc_desc() instead
In-Reply-To: <20120404154020.40C513E09D5@localhost> (Grant Likely's message of
 "Wed, 04 Apr 2012 08:40:20 -0700")
References: <1329383368-12122-1-git-send-email-grant.likely@secretlab.ca>
 <1329383368-12122-7-git-send-email-grant.likely@secretlab.ca>
 <m2iphj3zxr.fsf@igel.home> <m2hax2qeqs.fsf@igel.home>
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 <20120404154020.40C513E09D5@localhost>
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To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Grant Likely <grant.likely@secretlab.ca> writes:

> I bet it is NR_IRQS related.  You have SPARSE_IRQ enabled, which means
> the maximum number of irq_descs is IRQ_BITMAP_BITS (NR_IRQS + 8192).

The actual definition uses NR_IRQS + 8196.  Guess that's a typo.  (Does
it really make sense to add NR_IRQS here?)

> diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
> index cf417e51..9edf499 100644
> --- a/arch/powerpc/include/asm/irq.h
> +++ b/arch/powerpc/include/asm/irq.h
> @@ -20,7 +20,7 @@
>  
>  /* Define a way to iterate across irqs. */
>  #define for_each_irq(i) \
> -       for ((i) = 0; (i) < NR_IRQS; ++(i))
> +       for ((i) = 0; (i) < nr_irqs; ++(i))

There are exactly two uses of for_each_irq, one is related to cpu
hotplug, the other to kexec, so that cannot make any difference.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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