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Date:   Mon, 18 Jul 2022 11:34:50 -0700
From:   Linus Torvalds <>
To:     Michael Ellerman <>
Cc:     linuxppc-dev <>,
        Sudip Mukherjee <>,
        Kees Cook <>,
        Linux Kernel Mailing List <>,
Subject: Re: [PATCH] powerpc/64s: Disable stack variable initialisation for prom_init

On Mon, Jul 18, 2022 at 6:44 AM Michael Ellerman <> wrote:
> With GCC 12, allmodconfig enables CONFIG_INIT_STACK_ALL_PATTERN, which
> causes the compiler to emit memset calls to initialise on-stack
> variables with a pattern.

Ahh, and that explains why "volatile" made no difference. That did
seem very odd.

Thanks for figuring it out,


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