linux-kernel - Re: [PATCH v2] mac80211: LLVMLinux: Remove VLAIS usage from mac80211

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Message-ID: <531BCABD.6030000@converseincode.com>
Date:	Sat, 08 Mar 2014 17:58:21 -0800
From:	Behan Webster <behanw@...verseincode.com>
To:	Sergei Antonov <saproj@...il.com>, pageexec@...email.hu
CC:	John Linville <linville@...driver.com>,
	Johannes Berg <johannes@...solutions.net>, davem@...emloft.net,
	linux-wireless <linux-wireless@...r.kernel.org>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>,
	Jan-Simon Möller <dl9pf@....de>,
	Vinícius Tinti 
	<viniciustinti@...il.com>, Mark Charlebois <charlebm@...il.com>
Subject: Re: [PATCH v2] mac80211: LLVMLinux: Remove VLAIS usage from mac80211

On 03/08/14 15:00, Sergei Antonov wrote:
> On 8 March 2014 23:01, PaX Team <pageexec@...email.hu> wrote:
>> On 8 Mar 2014 at 21:29, Sergei Antonov wrote:
>>
>>>> -       memset(&aead_req, 0, sizeof(aead_req));
>>>> +       char aead_req_data[sizeof(struct aead_request) +
>>>> +                               crypto_aead_reqsize(tfm) +
>>>> +                               CRYPTO_MINALIGN] CRYPTO_MINALIGN_ATTR;
>>                                                       ^^^^^^^^^^^^^^^^^^^^
>> wouldn't the underlined attribute ensure the required alignment?
> Yes. Sorry, I overlooked it.
>
> I would remove unneeded CRYPTO_MINALIGN and get the alignment from the
> target structure:
>          char aead_req_data[sizeof(struct aead_request) +
>                             crypto_aead_reqsize(tfm)]
>                  __attribute__((__aligned__(__alignof__(struct aead_request))));
Even better. Will resubmit.

Behan

-- 
Behan Webster
behanw@...verseincode.com

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