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[ Upstream commit673643490b] Commit2ae6aaf769("md/raid10: fix io loss while replacement replace rdev") reads replacement first to prevent io loss. However, there are same issue in wait_blocked_dev() and raid10_handle_discard(), too. Fix it by using dereference_rdev_and_rrdev() to get devices. Fixes:d30588b273("md/raid10: improve raid10 discard request") Fixes:f2e7e269a7("md/raid10: pull the code that wait for blocked dev into one function") Signed-off-by: Li Nan <linan122@huawei.com> Link: https://lore.kernel.org/r/20230701080529.2684932-4-linan666@huaweicloud.com Signed-off-by: Song Liu <song@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.