linux-kernel - Re: [PATCH] microblaze: Fix pfn

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Message-Id: <1258468075.2971.6.camel@iscandar.digidescorp.com>
Date:	Tue, 17 Nov 2009 08:27:54 -0600
From:	"Steven J. Magnani" <steve@...idescorp.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Chen Liqin <liqin.chen@...plusct.com>,
	Lennox Wu <lennox.wu@...il.com>,
	David Howells <dhowells@...hat.com>,
	Greg Ungerer <gerg@...pgear.com>
Subject: Re: [PATCH] microblaze: Fix pfn_valid() for noMMU

On Mon, 2009-11-16 at 14:14 -0800, Andrew Morton wrote:
> On Fri, 13 Nov 2009 16:08:29 -0600
> steve@...idescorp.com wrote:
> 
> > Configuring DEBUG_SLAB causes a noMMU kernel to die during initialization
> > with an invalid virtual address panic in kfree_debugcheck().
> > The panic is due to an improper definition of pfn_valid().
> > 
> > ...
> Is arch/score/include/asm/page.h buggy also?
> 

I don't believe so, but only because MEMORY_START is defined as zero for
that arch, making min_low_pfn zero.

------------------------------------------------------------------------
 Steven J. Magnani               "I claim this network for MARS!
 www.digidescorp.com              Earthling, return my space modulator!"

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