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34a62cd0df
The ACPI idle driver will fallback to using the legacy P_LVL* SystemIO method of entering C-states if the _CST method is disabled and P_BLK is defined. However, in this case the C2 and C3 states won't have a description set, so the user will see "<null>" when reading the description from sysfs. Give each of these states a description. Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.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.