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Tian Tao
1c6b0bc73f
When memdup_user returns an error, memdup_user has two different return values, use PTR_ERR to get the correct return value. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Signed-off-by: Matias Bjørling <matias.bjorling@wdc.com> Link: https://lore.kernel.org/r/20210413105257.159260-3-matias.bjorling@wdc.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.