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2ea55bbba2
In order to avoid false positive circular locking lockdep splat when runnng the ww_mutex torture test, we need to make sure that the ww_mutexes have the same lock class as the acquire_ctx. This means the ww_mutexes must have the same lockdep key as the acquire_ctx. Unfortunately the current DEFINE_WW_MUTEX() macro fails to do that. As a result, we add an init method for the ww_mutex test to do explicit ww_mutex_init()'s of the ww_mutexes to avoid the false positive warning. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20210318172814.4400-3-longman@redhat.com |
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| README | ||
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.