[PATCH v3] random: handle archrandom with multiple longs

[David Laight]

...
> More directly, the reason we don't want to error is because the use case
> has fallbacks meant to handle errors. The cascade looks like this
> (quoting from the other email):
> 
>     unsigned long array[whatever];
>     for (i = 0; i < ARRAY_SIZE(array);) {
>         longs = arch_get_random_seed_longs(&array[i], ARRAY_SIZE(array) - i);
>         if (longs) {
>             i += longs;
>             continue;
>         }
>         longs = arch_get_random_longs(&array[i], ARRAY_SIZE(array) - i);
>         if (longs) {
>             i += longs;
>             continue;
>         }
>         array[i++] = random_get_entropy();
>     }
> 
> It tries to get the best that it can as much as it can, but isn't going
> to block or do anything too nuts for that.

Do you really want to retry the earlier calls that returned no data?

	David

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