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6a11ffc2cc
However "sys" is not a valid function, and it is always on.
Let's keep existing functions.
Fixes: db792e9adb ("rockchip: rk3399: Add support for FriendlyARM NanoPi R4S")
Suggested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tianling Shen <cnsztl@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Link: https://lore.kernel.org/r/20210426114652.29542-1-cnsztl@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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.