Re: linux-next: manual merge of the powerpc tree with the arm tree

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On Fri, Mar 09, 2012 at 10:51:27AM -0600, Rob Herring wrote:
> On 03/08/2012 09:13 PM, Benjamin Herrenschmidt wrote:
> > On Fri, 2012-03-09 at 00:39 +0000, Russell King wrote:
> >> On Fri, Mar 09, 2012 at 10:35:46AM +1100, Benjamin Herrenschmidt wrote:
> >>> Actually, I didn't keep MAY_HAVE_SPARSE_IRQ, I kept HAVE_SPARSE_IRQ. If
> >>> I remove it, then I get Kconfig warnings:
> >>>
> >>> warning: (PPC) selects SPARSE_IRQ which has unmet direct dependencies
> >>> (HAVE_GENERIC_HARDIRQS && HAVE_SPARSE_IRQ)
> >>
> >> Do you have commit 2ed86b16eabe4efbf80cc725a8cbb5310746a2fc ?
> > 
> > Nope, Grant patch didn't mention a dependency.
> 
> My opinion is that SPARSE_IRQ shouldn't be user visible option, and the
> simple solution was to just make it hidden. It wasn't clear if this was
> desired or not for other arches at the time. There is a mixture of
> settings in powerpc defconfigs. SuperH selects it for 32-bit and leaves
> it user selectable for 64-bit.
> 
> I'm happy to revert adding MAY_HAVE_SPARSE_IRQ and just make SPARSE_IRQ
> a hidden option. It really just needs the okay from SuperH folks.
> 
We basically want it always-enabled for 32-bit and it doesn't matter much
about 64-bit. In the future I'll probably fix up the 64-bit stuff to use
it too and then we'll just leave it on all the time, but it's not such a
big deal if it's not visible for enabling on 64-bit at the moment given
that it's probably broken there at the moment.
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