Re: [BUGFIX 2/3] crypto: Remove CRYPTO_TFM_REQ_MAY_SLEEP flag inAES-NI accelerated ecb/cbc mode

From: Herbert Xu
Date: Thu Jun 18 2009 - 07:40:44 EST

On Mon, Jun 15, 2009 at 05:04:57PM +0800, Huang Ying wrote:
> Because AES-NI instructions will touch XMM state, corresponding code
> must be enclosed within kernel_fpu_begin/end, which used
> preempt_disable/enable. So sleep should be prevented between
> kernel_fpu_begin/end.
> Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx>

I'll apply this for now. But it would be much better to allow
sleeping in this case.

Couldn't we simply move the kernel_fpu_begin/end inside the loop?
It shouldn't be too expensive when it runs the 2nd time since it
doesn't have to save anything, right?

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