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Date: Fri, 14 Aug 2009 12:38:18 +0300
From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Lin Ming <ming.m.lin@intel.com>
Cc: Len Brown <lenb@kernel.org>, "Brown, Len" <len.brown@intel.com>,
       "Moore, Robert" <robert.moore@intel.com>,
       "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: acpi_ex_system_memory_space_handler oops
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I suspect we are dereferencing NULL pointer:
mov    0x8(%ebx)

which is mem_info->mapped_physical_address.

	Sergey
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