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-rw-r--r--Documentation/dev-tools/sparse.rst6
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diff --git a/Documentation/dev-tools/sparse.rst b/Documentation/dev-tools/sparse.rst
index 78aa00a604a0..ffdcc97f6f5a 100644
--- a/Documentation/dev-tools/sparse.rst
+++ b/Documentation/dev-tools/sparse.rst
@@ -103,3 +103,9 @@ have already built it.
The optional make variable CF can be used to pass arguments to sparse. The
build system passes -Wbitwise to sparse automatically.
+
+Checking RCU annotations
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+RCU annotations are not checked by default. To enable RCU annotation
+checks, include -DCONFIG_SPARSE_RCU_POINTER in your CF flags.