Re: [PATCH] generic debug pagealloc

[Akinobu Mita]

On Tue, Mar 03, 2009 at 05:05:03PM +0100, Ingo Molnar wrote:
> if every architecture supports it now then i guess this config 
> switch can go away:
> 
> > +config ARCH_SUPPORTS_DEBUG_PAGEALLOC
> > +	def_bool y

The generic debug pagealloc needs the poison flag for each struct page.

So I introduced CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC for x86, powerpc,
sparc (64bit), and s390. If there is no CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC,
make config prompts the generic debug pagealloc in mm/Kconfig.debug for the
other architectures.

I was trying to add cleaner config dependency but
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC is my solution for now.
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