docs: Create a user-space API guide
This is meant to be the place for documentation relevant to application
developers. It's empty for the moment, but at least we have a place now!
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/userspace-api/index.rst b/Documentation/userspace-api/index.rst
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+=====================================
+The Linux kernel user-space API guide
+=====================================
+
+.. _man-pages: https://www.kernel.org/doc/man-pages/
+
+While much of the kernel's user-space API is documented elsewhere
+(particularly in the man-pages_ project), some user-space information can
+also be found in the kernel tree itself. This manual is intended to be the
+place where this information is gathered.
+
+.. class:: toc-title
+
+ Table of contents
+
+.. toctree::
+ :maxdepth: 2
+
+.. only:: subproject and html
+
+ Indices
+ =======
+
+ * :ref:`genindex`