linux-kernel - Re: arm64: pointer_auth.h:40:3: error: implicit declaration of function ‘get_random_bytes’; did you mean ‘get_random

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Date:   Thu, 30 Jul 2020 11:56:22 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        "Theodore Ts'o" <tytso@....edu>, Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Mark Brown <broonie@...nel.org>,
        Richard Henderson <richard.henderson@...aro.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org, Emese Revfy <re.emese@...il.com>,
        hsinyi@...omium.org, Will Deacon <will@...nel.org>,
        Willy Tarreau <w@....eu>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: arm64: pointer_auth.h:40:3: error: implicit declaration of function ‘get_random_bytes’; did you mean ‘get_random_once’?

On Thu, Jul 30, 2020 at 11:47 AM Grygorii Strashko
<grygorii.strashko@...com> wrote:
>
>
> I'd like to note that below set of patches:
> 1c9df907da83 random: fix circular include dependency on arm64 after addition of percpu.h
> 83bdc7275e62 random32: remove net_rand_state from the latent entropy gcc plugin
> f227e3ec3b5c random32: update the net random state on interrupt and activity
>
> also break ARM build for the case:
> #if defined(CONFIG_SMP) && !defined(CONFIG_CPU_V6)

Lovely.

I think I'll have to revert 1c9df907da83 after all, and  use Marc
Zyngier's patch to just remove that troublesome <asm/pointer_auth.h>
include in arm64 instead.

This turned out to be much messier than it should have been.

            Linus