linux-kernel - Re: [PATCH 1/3] random: unify early init crng load accounting

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Date:   Sun, 13 Feb 2022 07:55:20 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-kernel@...r.kernel.org, Theodore Ts'o <tytso@....edu>
Subject: Re: [PATCH 1/3] random: unify early init crng load accounting

Am Sun, Feb 13, 2022 at 12:10:20AM +0100 schrieb Jason A. Donenfeld:
> crng_fast_load() and crng_slow_load() have different semantics:
> 
> - crng_fast_load() xors and accounts with crng_init_cnt.
> - crng_slow_load() hashes and doesn't account.
> 
> However add_hwgenerator_randomness() can afford to hash (it's called
> from a kthread), and it should account. Additionally, ones that can
> afford to hash don't need to take a trylock but can take a normal lock.
> So, we combine these into one function, crng_pre_init_inject(), which
> allows us to control these in a uniform way. This will make it simpler
> later to simplify this all down when the time comes for that.

I thought the call to crng_fast_load() from add_input_randomness() is on its
way out?

Otherwise, patch looks fine:

	Reviewed-by: Dominik Brodowski <linux@...inikbrodowski.net>

Thanks,
	Dominik