* Thomas Gleixner <[email protected]> wrote:
> On Tue, 28 May 2013, tip-bot for David Cohen wrote:
>
> > Commit-ID: 8c956b1b935ec98decb470a6abff8c1f8b28e9f0
> > Gitweb:
> > http://git.kernel.org/tip/8c956b1b935ec98decb470a6abff8c1f8b28e9f0
> > Author: David Cohen <[email protected]>
> > AuthorDate: Tue, 30 Apr 2013 16:20:15 -0700
> > Committer: Ingo Molnar <[email protected]>
> > CommitDate: Tue, 28 May 2013 12:01:29 +0200
> >
> > irq/x86/io_apic: Fix number of pre-allocated irqs
> >
> > arch_probe_nr_irqs() has a typo when returning number of
> > preallocated irqs. Instead of returning the calculated value, it
> > returns a constant number NR_IRQ_LEGACY.
>
> That's not a typo. That's on purpose.
>
> We don't want to allocate a gazillion of interrupt descriptors for
> nothing. The only ones which must be pre-allocated are the legacy
> ones.
>
> > This patch makes sure the calculated value is returned intead.
>
> And therefor defeats the whole purpose of sparse irqs.
>
> I'll zap that commit.
Oops, I had a sneaking suspicion about this change but did not read the
code far enough - thanks for correcting my brainfart!
Thanks,
Ingo
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