From: Yinghai Lu <yinghai@kernel.org>
Date: Thu, 17 Feb 2011 13:46:37 +0000 (+0100)
Subject: x86-64, NUMA: Don't call __pa() with invalid address in numa_reset_distance()
X-Git-Tag: v2.6.39-rc1~499^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ca230baeb7c61864cab9b53e37a3da28a2ca7e5;p=pandora-kernel.git

x86-64, NUMA: Don't call __pa() with invalid address in numa_reset_distance()

Do not call __pa(numa_distance) if it was not allocated before.
Calling with invalid address triggers VIRTUAL_BUG_ON() in
__phys_addr() if CONFIG_DEBUG_VIRTUAL.

Also reported by Ingo.

 http://thread.gmane.org/gmane.linux.kernel/1101306/focus=1101785

- v2: Change to check existing path as tj requested.
- tj: Description update.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ingo Molnar <mingo@elte.hu>
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