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6e0cd4a9dd4df1a0afcb454f1e654b5c80685913
In umount, we give an constand time to handle pending discard, previously, in __issue_discard_cmd() we missed to check timeout condition in loop, result in delaying long time, fix it. Signed-off-by: Heng Xiao <heng.xiao@unisoc.com> [Chao Yu: add commit message] Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@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.
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