linux-kernel - Re: [PATCH 1/2] mm: Change mmap_rnd_bits_max to __ro_after

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Message-ID: <202309291454.436E19663@keescook>
Date:   Fri, 29 Sep 2023 14:55:00 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-riscv@...ts.infradead.org, llvm@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mm: Change mmap_rnd_bits_max to __ro_after_init

On Fri, Sep 29, 2023 at 09:11:57PM +0000, Sami Tolvanen wrote:
> Allow mmap_rnd_bits_max to be updated on architectures that
> determine virtual address space size at runtime instead of relying
> on Kconfig options by changing it from const to __ro_after_init.
> 
> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>

Just the kind of thing __ro_after_init was made for. :)

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook