linux-next: build warning after merge of the vhost tree

[Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>]

Hi all,

After merging the vhost tree, today's linux-next build (htmldocs)
produced this warning:

Documentation/driver-api/index.rst:14: WARNING: toctree contains reference to nonexisting document 'driver-api/virtio/index'

Introduced by commit

  6355eeb59129 ("docs: driver-api: virtio: virtio on Linux")

-- 
Cheers,
Stephen Rothwell

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