[Bug 77201] CPU online hangs, works when powernow-k8 is UN-loaded

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--- Comment #66 from Srivatsa S. Bhat <srivatsa@xxxxxxx> ---
Hi Mauro,

You can continue debugging with Viresh suggestions, since that's one of the
ways to debug this issue. When time permits, can you please try this commit:

commit 5bdfff96c69a4d5ab9c49e60abf9e070ecd2acbb
Author: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Date:   Sat Feb 15 22:02:28 2014 +0800

    workqueue: ensure @task is valid across kthread_stop()

Of course, try one commit before it and see if it works, and then try the above
mentioned commit and see if it fails.

The reason I chose this commit is because there are only 2 commits in the
workqueue code between 3.13.8 and 3.14.1, and the other commit is not relevant
to your case because it is active only if CONFIG_DEBUG_OBJECTS_WORK is set (and
this option is not set in your .config).

Thank you!

Srivatsa S. Bhat

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