tree a56b235fa35c2e528752071df2a6e21a25a4e8f6
parent a120586873d3d64de93bd6d593d237e131994e58
author Christian Krafft <krafft@de.ibm.com> 1165465961 -0800
committer Linus Torvalds <torvalds@woody.osdl.org> 1165509562 -0800

[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>