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From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Lv Zheng <lv.zheng@intel.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Len Brown <len.brown@intel.com>, linux-kernel@vger.kernel.org,
        linux-acpi@vger.kernel.org
Subject: Re: [PATCH 06/13] ACPI/IPMI: Add reference counting for ACPI operation region handlers
Date: Thu, 25 Jul 2013 23:29:13 +0200
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On Tuesday, July 23, 2013 04:09:43 PM Lv Zheng wrote:
> This patch adds reference couting for ACPI operation region handlers to fix
> races caused by the ACPICA address space callback invocations.
> 
> ACPICA address space callback invocation is not suitable for Linux
> CONFIG_MODULE=y execution environment.

Actually, can you please explain to me what *exactly* the problem is?

Rafael