From 7c309a64d6afa90a0a07813c836ba480aeaeca8c Mon Sep 17 00:00:00 2001
From: Christian Krafft <krafft@de.ibm.com>
Date: Wed, 6 Dec 2006 20:32:41 -0800
Subject: [PATCH] [PATCH] enable booting a NUMA system where some nodes have no
 memory

When booting a NUMA system with nodes that have no memory (eg by limiting
memory), bootmem_alloc_core tried to find pages in an uninitialized
bootmem_map.  This caused a null pointer access.  This fix adds a check, so
that NULL is returned.  That will enable the caller (bootmem_alloc_nopanic)
to alloc memory on other without a panic.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Martin Bligh <mbligh@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
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