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The len value is in bytes, while `dt_root_addr_cells + dt_root_size_cells` is in cells (4 bytes per cell). Modulo calculation between them is incorrect, the units must be converted first. Use helper functions to simplify the code and fix this issue. Fixes:fb319e77a0("of: fdt: Add memory for devices by DT property "linux,usable-memory-range"") Fixes:2af2b50acf("of: fdt: Add generic support for handling usable memory range property") Fixes:8f579b1c4e("arm64: limit memory regions based on DT property, usable-memory-range") Signed-off-by: Yuntao Wang <yuntao.wang@linux.dev> Link: https://patch.msgid.link/20251115134753.179931-4-yuntao.wang@linux.dev Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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.