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Because the ACPI thermal driver generally operates temperature values in deci-Kelvin, it needs the library functions returning temperature for various trip point types to use deci-Kelvin too. To address that, arrange the ACPI thermal library code in three levels of functions where the high-level ones will return temperature in milli-Celsius, as needed by the thermal core and the majority of thermal drivers, the mid-level ones will return temperature in deci-Kelvin and will be called internally by the corresponding high- level functions, and all of the mid-level functions will call the same low-level one, acpi_trip_temp(), to actually evaluate ACPI objects to retrieve themperature values from the platform firmware. Going forward, this will allow the ACPI thermal driver to use the mid-level functions to provide temperature values needed by it, so as to reduce code duplication related to evaluating trip temperature ACPI control methods. No intentional functional impact. 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.