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From: Kyle Moffett <mrmacman_g4@mac.com>
Subject: [2.6.15-rc2-mm1] Disabled flatmem on ppc32? (ARCH=powerpc)
Date: Sat, 26 Nov 2005 20:46:31 -0500
To: LKML Kernel <linux-kernel@vger.kernel.org>
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There is a Kconfig problem for ppc32 in the latest -mm kernel.  It  
seems that somehow the Kconfig logic for selecting memory models  
under ARCH=powerpc doesn't quite get it right for standard flatmem  
ppc32 systems.  When I look at the memory model selection, I only see  
sparsemem, whereas on a normal -rc2 kernel, I can see both flatmem  
and sparsemem.  This somehow triggers a #error where the number of  
reserved bits is less than the number necessary for the sparsemem  
layout (because we're on a 32-bit arch without the address space for  
sparsemem?).

Cheers,
Kyle Moffett