IDR: Note that the IDR API is deprecated

Some people read the documentation, perhaps. Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
josf · Jul 11, 2022 · 85656ec · 85656ec
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commit 85656ec
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diff --git a/Documentation/core-api/idr.rst b/Documentation/core-api/idr.rst
@@ -17,6 +17,9 @@ solution to the problem to avoid everybody inventing their own.  The IDR
 provides the ability to map an ID to a pointer, while the IDA provides
 only ID allocation, and as a result is much more memory-efficient.
 
+The IDR interface is deprecated; please use the :doc:`XArray <xarray>`
+instead.
+
 IDR usage
 =========