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

[Stephen Rothwell]

Hi all,

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

Documentation/filesystems/index.rst:50: WARNING: toctree contains reference to nonexisting document 'filesystems/buffer'

Introduced by commit

  4b61a0e73910 ("doc: split buffer.rst out of api-summary.rst")

from the mm-unstable branch of the mm tree.
-- 
Cheers,
Stephen Rothwell

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