From: Yinghai Lu <yinghai@kernel.org>
Date: Tue, 3 Mar 2009 07:36:13 +0000 (-0800)
Subject: x86: fix init_memory_mapping() to handle small ranges
X-Git-Tag: v2.6.29-rc7~3^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0fc59d3a01820765e5f3a723733728758b0cf577;p=pandora-kernel.git

x86: fix init_memory_mapping() to handle small ranges

Impact: fix failed EFI bootup in certain circumstances

Ying Huang found init_memory_mapping() has problem with small ranges
less than 2M when he tried to direct map the EFI runtime code out of
max_low_pfn_mapped.

It turns out we never considered that case and didn't check the range...

Reported-by: Ying Huang <ying.huang@intel.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Maly <bmaly@redhat.com>
LKML-Reference: <49ACDDED.1060508@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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