Re: [RFC PATCH v12 1/4] crypto: make Jitter RNG directly accessible

[Arnd Bergmann]

On Tue, Jul 18, 2017 at 11:10 AM, Stephan MÃller <smueller@xxxxxxxxxx> wrote:
> Am Dienstag, 18. Juli 2017, 11:02:02 CEST schrieb Arnd Bergmann:
>
> Hi Arnd,
>>
>> I can see why the jitterentropy implementation avoids using kernel headers,
>> the problem now is that part of it gets moved into a new header, and that
>> already violates the original principle.
>>
>> From my reading of the code, we could probably leave the structure
>> definition in the crypto/jitterentropy.c, and have the statically
>> allocated instance in the same file when CONFIG_LRNG is
>> set,
>
> That is a very good idea -- I will implement this approach.

I guess ideally you just move the inner half of lrng_get_jent(),
i.e. everything inside of the spinlock, plus the buffer, into that file.
That should keep the low-level side separate from the caller.

      Arnd