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Linus Torvalds authored
Pull workqueue updates from Tejun Heo:
 "There have been sporadic reports of sanity checks in
  destroy_workqueue() failing spuriously over the years. This contains
  the fix and its follow-up changes / fixes.

  There's also a RCU annotation improvement"

* 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: Add RCU annotation for pwq list walk
  workqueue: Fix pwq ref leak in rescuer_thread()
  workqueue: more destroy_workqueue() fixes
  workqueue: Minor follow-ups to the rescuer destruction change
  workqueue: Fix missing kfree(rescuer) in destroy_workqueue()
  workqueue: Fix spurious sanity check failures in destroy_workqueue()
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.