linux-kernel - Re: [PATCH 1/1] of: properties of reserved-memory nodes

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Date:   Thu, 10 Sep 2020 17:49:35 +0100
From:   Grant Likely <grant.likely@....com>
To:     Heinrich Schuchardt <xypron.glpk@....de>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ard Biesheuvel <ardb@...nel.org>, nd <nd@....com>
Subject: Re: [PATCH 1/1] of: properties of reserved-memory nodes



On 10/09/2020 17:20, Heinrich Schuchardt wrote:
> The reusable and the no-map property are mutually exclusive.
> Clarify this in the documentation.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>

Acked-by: Grant Likely <grant.likely@....com>

> ---
>   .../devicetree/bindings/reserved-memory/reserved-memory.txt    | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
> index bac4afa3b197..eb987203548f 100644
> --- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
> +++ b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
> @@ -64,6 +64,9 @@ reusable (optional) - empty property
>         system can use that region to store volatile or cached data that
>         can be otherwise regenerated or migrated elsewhere.
> 
> +A node must not carry both the no-map and the reusable property as these are
> +logically contradictory.
> +
>   Linux implementation note:
>   - If a "linux,cma-default" property is present, then Linux will use the
>     region for the default pool of the contiguous memory allocator.
> --
> 2.28.0
>