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From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Thu, 23 Sep 2021 02:08:39 +0200
Message-ID: <CACRpkdZzz5_oVSXPwuwpqMDYvzwTkHvmy6ua6yoJqOOSuZb4xg@mail.gmail.com>
Subject: Re: [PATCH v6] ARM: uncompress: Parse "linux,usable-memory-range" DT property
To:     Geert Uytterhoeven <geert+renesas@glider.be>
Cc:     Russell King <linux@armlinux.org.uk>,
        Nicolas Pitre <nico@fluxnic.net>,
        Ard Biesheuvel <ardb@kernel.org>,
        Lukasz Stelmach <l.stelmach@samsung.com>,
        Simon Horman <horms@verge.net.au>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        kexec@lists.infradead.org
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On Wed, Sep 15, 2021 at 3:20 PM Geert Uytterhoeven
<geert+renesas@glider.be> wrote:

> Add support for parsing the "linux,usable-memory-range" DT property.
> This property is used to describe the usable memory reserved for the
> crash dump kernel, and thus makes the memory reservation explicit.
> If present, Linux no longer needs to mask the program counter, and rely
> on the "mem=" kernel parameter to obtain the start and size of usable
> memory.
>
> For backwards compatibility, the traditional method to derive the start
> of memory is still used if "linux,usable-memory-range" is absent.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Very nice patch!
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij