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e9e64f85b4
Pull workqueue updates from Tejun Heo: - The code around workqueue scheduler hooks got reorganized early 2019 which unfortuately introdued a couple subtle and rare race conditions where preemption can mangle internal workqueue state triggering a WARN and possibly causing a stall or at least delay in execution. Frederic fixed both early December and the fixes were sitting in for-5.16-fixes which I forgot to push. They are here now. I'll forward them to stable after they land. - The scheduler hook reorganization has more implicatoins for workqueue code in that the hooks are now more strictly synchronized and thus the interacting operations can become more straight-forward. Lai is in the process of simplifying workqueue code and this pull request contains some of the patches. * 'for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Remove the cacheline_aligned for nr_running workqueue: Move the code of waking a worker up in unbind_workers() workqueue: Remove schedule() in unbind_workers() workqueue: Remove outdated comment about exceptional workers in unbind_workers() workqueue: Remove the advanced kicking of the idle workers in rebind_workers() workqueue: Remove the outdated comment before wq_worker_sleeping() workqueue: Fix unbind_workers() VS wq_worker_sleeping() race workqueue: Fix unbind_workers() VS wq_worker_running() race workqueue: Upgrade queue_work_on() comment
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.