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

[Stephen Rothwell]

Hi all,

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

Documentation/core-api/cgroup.rst:6: WARNING: Title underline too short.

Device Memory Cgroup API (dmemcg)
=========================

Introduced by commit

  b168ed458dde ("kernel/cgroup: Add "dmem" memory accounting cgroup")

-- 
Cheers,
Stephen Rothwell

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