From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [BUGFIX] ACPI, APEI, EINJ Param support is disabled by default
Date: Thu, 21 Jul 2011 04:42:04 +0200
Message-ID: <20110721024204.GJ8006@one.firstfloor.org>
References: <1311149369-20624-1-git-send-email-ying.huang@intel.com>
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To: Huang Ying <ying.huang@intel.com>
Cc: Len Brown <lenb@kernel.org>, linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>, Tony Luck <tony.luck@intel.com>, linux-acpi@vger.kernel.org, Matthew Garrett <mjg@redhat.com>

>  
> +static bool param_extension;
> +module_param(param_extension, bool, 0);

Make it 0644, then it can be changed at runtime. No need to require a reboot.

-Andi