[PATCH v9] seedrng: import SeedRNG utility for kernel RNG seed files

[David Laight]

From: Denys Vlasenko
> Sent: 29 April 2022 17:17
> 
> On Wed, Apr 27, 2022 at 6:55 PM Jason A. Donenfeld <Jason at zx2c4.com> wrote:
> > On Wed, Apr 27, 2022 at 06:15:50PM +0200, Denys Vlasenko wrote:
> > > Can we replace all [s]size_t's with ints/unsigneds? We do not expect
> > > random pools anywhere near 4 gigabytes...
> >
> > Probably that's fine. Is the advantage to tossing out consistent types
> > worth it though? Does this actually save space? Since [s]size_t is
> > usually the word size, won't codegen not really change much?
> 
> For example, on x86-64, 32-bit insns are often shorter.

Provided you remember to use 'unsigned int' for array subscripts.
Otherwise you can get a lot of 'sign extend' instructions.

	David

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