Re: [PATCH] virtio: document the map API in the driver writing guide

[Krzysztof Kozlowski <krzk@kernel.org>]

On 12/03/2026 22:58, John S wrote:
> Add a new "Buffer mapping" section to the virtio driver writing guide
> documenting the virtio map API (struct virtio_map_ops). This API was
> introduced in commit bee8c7c24b73 ("virtio: introduce map ops in virtio
> core") to allow transports and devices that do not perform DMA (such
> as VDUSE) to provide their own buffer mapping logic instead of abusing
> the DMA API.
> 
> The new section explains when and why custom map ops are used, documents
> the virtio_map_ops structure and the union virtio_map token, and
> references the driver-facing mapping helpers with their kernel-doc.
> 
> Signed-off-by: Kit Dallege <xaum.io@gmail.com>
> ---
>  .../virtio/writing_virtio_drivers.rst         | 72 +++++++++++++++++++
>  1 file changed, 72 insertions(+)

NAK, because:
1. Mismatched DCO or anonymous contribution
2. Likely unverified LLM microslop

Best regards,
Krzysztof