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585463fee6
The box_ids only save the unit ID for the first die. If a unit, e.g., a CXL unit, doesn't exist in the first die. The unit ID cannot be retrieved. The unit control RB tree also stores the unit ID information. Retrieve the unit ID from the unit control RB tree Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Yunying Sun <yunying.sun@intel.com> Link: https://lore.kernel.org/r/20240614134631.1092359-4-kan.liang@linux.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 reStructuredText 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.