iwmmxt signal frame handling

[Haojian Zhuang]

>-----Original Message-----
>From: Eric Miao [mailto:eric.y.miao at gmail.com]
>Sent: 2010年10月15日 11:19 PM
>To: Arnd Bergmann
>Cc: linux-arm-kernel at lists.infradead.org; Peter Maydell; Russell King; Haojian Zhuang
>Subject: Re: iwmmxt signal frame handling
>
>On Fri, Oct 15, 2010 at 9:40 PM, Arnd Bergmann <arnd at arndb.de> wrote:
>> On Friday 15 October 2010 15:32:04 Eric Miao wrote:
>>> > Acked-by: Eric Miao <eric.y.miao at gmail.com>
>>> >
>>>
>>> This also passes the internal iwmmxt test, Haojian please add your
>>> Tested-by please.
>>
>> Can you also confirm that the previous behaviour is broken?
>> If it is, the patch is probably a candidate for the stable trees.
>>
>
>I don't believe the previous behavior is going to cause any serious issue. The
>magic/size are only saved/restored only for those processes with
>TIF_USING_IWMMXT
>flag set. Yet this patch does seem to improve from security perspective by
>zero-ing the buffer.
>
>BTW: I didn't look too much into the code, but it seems to me that the aux can
>just be zero-ed in a whole?
>
>

Yes, the previous behavior doesn't cause serious issue on the testcases.

You can add "Test-by: Haojian Zhuang <haojian.zhuang at marvell.com>".

Thanks
Haojian