Message-ID: <1349962956.15966.521.camel@mfleming-mobl1.ger.corp.intel.com>
Subject: Re: [PATCH] efivarfs: Implement exclusive access for
 {get,set}_variable
From: Matt Fleming <matt.fleming@intel.com>
To: Jeremy Kerr <jeremy.kerr@canonical.com>
Cc: linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
        Andy Whitcroft <apw@canonical.com>, Matthew Garrett <mjg@redhat.com>
Date: Thu, 11 Oct 2012 14:42:36 +0100
In-Reply-To: <1349961551.174484.910885224391.1.gpush@pecola>
References: <1349961551.174484.910885224391.1.gpush@pecola>
Organization: Intel Corporation (UK) Ltd. - Registered No. 1134945 - Pipers
 Way, Swindon SN3 1RJ
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On Thu, 2012-10-11 at 21:19 +0800, Jeremy Kerr wrote:
> Currently, efivarfs does not enforce exclusion over the get_variable and
> set_variable operations. Section 7.1 of UEFI requires us to only allow a
> single processor to enter {get,set}_variable services at once.
> 
> This change acquires the efivars->lock over calls to these operations
> from the efivarfs paths.
> 
> Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
> 
> ---
>  drivers/firmware/efivars.c |   68 +++++++++++++++++++++++--------------
>  1 file changed, 43 insertions(+), 25 deletions(-)

Thanks, applied to 'next'.


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