Re: [PATCH v3 03/03]: hwrng: khwrngd derating per device

[Andy Lutomirski]

On Mon, Apr 14, 2014 at 9:06 AM, Torsten Duwe <duwe@xxxxxx> wrote:
>
> This patch introduces a derating factor to struct hwrng for
> the random bits going into the kernel input pool, and a common
> default derating for drivers which do not specify one.
>
> Signed-off-by: Torsten Duwe <duwe@xxxxxxx>
>
> ---
>  drivers/char/hw_random/core.c |   11 ++++++++++-
>  include/linux/hw_random.h     |    3 +++
>  2 files changed, 13 insertions(+), 1 deletion(-)
>
> --- linux/include/linux/hw_random.h.orig
> +++ linux/include/linux/hw_random.h
> @@ -29,6 +29,8 @@
>   * @read:              New API. drivers can fill up to max bytes of data
>   *                     into the buffer. The buffer is aligned for any type.
>   * @priv:              Private data, for use by the RNG driver.
> + * @derating:          Estimation of true entropy in RNG's bitstream
> + *                     (per mill).

I'll bikeshed again: this is a rating, not a *de*rating.  Higher =
more confidence, at least assuming the comment is right.

--Andy
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