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[ Upstream commit7d5fff8982] __md_stop_writes() and __md_stop() will modify many fields that are protected by 'reconfig_mutex', and all the callers will grab 'reconfig_mutex' except for md_stop(). Also, update md_stop() to make certain 'reconfig_mutex' is held using lockdep_assert_held(). Fixes:9d09e663d5("dm: raid456 basic support") Signed-off-by: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.