linux-kernel - Re: [PATCH v5 07/11] x86: use fallback for random_get

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Message-ID: <Yl8GhNjwPLNiUfSZ@zn.tnic>
Date:   Tue, 19 Apr 2022 20:59:16 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>, Theodore Ts'o <tytso@....edu>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        "David S . Miller" <davem@...emloft.net>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H . Peter Anvin" <hpa@...or.com>, Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Dinh Nguyen <dinguyen@...nel.org>,
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        linux-xtensa@...ux-xtensa.org
Subject: Re: [PATCH v5 07/11] x86: use fallback for random_get_entropy()
 instead of zero

On Tue, Apr 19, 2022 at 08:38:41PM +0200, Jason A. Donenfeld wrote:
> I think I prefer doing (a), and leaving (b) for another time when you
> or another x86 maintainer can do so. But I'll do whichever you say.
> Which would you like?

We are switching all feature checks to cpu_feature_enabled() so you
might as well do the new preferred way of checking when adding a
new function and so that we have one less place to touch. Which is
appreciated. :)

Thx!

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette