Some big changes this month, headlined by the addition of a new formatted

documentation mechanism based on the Sphinx system.  The objectives here
are to make it easier to create better-integrated (and more attractive)
documents while (eventually) dumping our one-of-a-kind, cobbled-together
system for something that is widely used and maintained by others.  There's
a fair amount of information what's being done, why, and how to use it in:

  https://lwn.net/Articles/692704/
  https://lwn.net/Articles/692705/

Closer to home, Documentation/kernel-documentation.rst describes how it
works.

For now, the new system exists alongside the old one; you should soon see
the GPU documentation converted over in the DRM pull and some significant
media conversion work as well.  Once all the docs have been moved over and
we're convinced that the rough edges (of which are are a few) have been
smoothed over, the DocBook-based stuff should go away.

Primary credit is to Jani Nikula for doing the heavy lifting to make this
stuff actually work; there has also been notable effort from Markus Heiser,
Daniel Vetter, and Mauro Carvalho Chehab.

Expect a couple of conflicts on the new index.rst file over the course of
the merge window; they are trivially resolvable.  That file may be a bit of
a conflict magnet in the short term, but I don't expect that situation to
last for any real length of time.

Beyond that, of course, we have the usual collection of tweaks, updates,
and typo fixes.
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