2020-09-10 16:27:48

by Heinrich Schuchardt

Subject: [PATCH 1/1] of: properties of reserved-memory nodes

The reusable and the no-map property are mutually exclusive.
Clarify this in the documentation.

Signed-off-by: Heinrich Schuchardt <[email protected]>
---
.../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

2020-09-10 16:52:54

by Grant Likely

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 <[email protected]>

Acked-by: Grant Likely <[email protected]>

> ---
> .../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
>

2020-09-15 21:12:22

by Rob Herring (Arm)

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

On Thu, 10 Sep 2020 18:20:20 +0200, Heinrich Schuchardt wrote:
> The reusable and the no-map property are mutually exclusive.
> Clarify this in the documentation.
>
> Signed-off-by: Heinrich Schuchardt <[email protected]>
> ---
> .../devicetree/bindings/reserved-memory/reserved-memory.txt | 3 +++
> 1 file changed, 3 insertions(+)
>

Applied, thanks!