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e93a238605
`Option<&T>` and `Option<&mut T>` are documented [1] to have the `None`
variant be all zeroes.
Link: https://doc.rust-lang.org/stable/std/option/index.html#representation [1]
Link: 5ef1638c79
Link: https://lore.kernel.org/all/20250523145125.523275-5-lossin@kernel.org
Signed-off-by: Benno Lossin <lossin@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.