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Alex Deucher
d08d692ebb
1. Initialize the counters to 0 in case the callback fails to initialize them. 2. The counters don't exist on APUs so return an error for them. 3. Return an error if the callback doesn't exist. Reviewed-by: Yong Zhao <Yong.Zhao@amd.com> Reviewed-By: Kent Russell <kent.russell@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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.