[PATCH] docs: rust: add "The Rust experiment" section

[Miguel Ojeda <ojeda@kernel.org>]

Clarify that the Rust experiment is still going on to avoid
confusion for both kernel maintainers and end users.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
Andrew: I did not add a `Suggested-by` just in case, but please let me know
if you want it, of course.

 Documentation/rust/index.rst | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/rust/index.rst b/Documentation/rust/index.rst
index e599be2cec9b..aaed36af15ce 100644
--- a/Documentation/rust/index.rst
+++ b/Documentation/rust/index.rst
@@ -6,6 +6,23 @@ Rust
 Documentation related to Rust within the kernel. To start using Rust
 in the kernel, please read the quick-start.rst guide.

+
+The Rust experiment
+-------------------
+
+The Rust support was merged in v6.1 into mainline in order to help in
+determining whether Rust as a language was suitable for the kernel, i.e. worth
+the tradeoffs.
+
+Currently, the Rust support is primarily intended for kernel developers and
+maintainers interested in the Rust support, so that they can start working on
+abstractions and drivers, as well as helping the development of infrastructure
+and tools.
+
+In particular, if you are an end user, please note that there are no in-tree
+drivers/modules suitable or intended for production use yet.
+
+
 .. only:: rustdoc and html

 	You can also browse `rustdoc documentation <rustdoc/kernel/index.html>`_.

base-commit: 94f6f0550c625fab1f373bb86a6669b45e9748b3
--
2.42.0