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-rw-r--r--Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
index 4dd20de6977f..e8d3096d922c 100644
--- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
+++ b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
@@ -64,6 +64,9 @@ reusable (optional) - empty property
system can use that region to store volatile or cached data that
can be otherwise regenerated or migrated elsewhere.
+A node must not carry both the no-map and the reusable property as these are
+logically contradictory.
+
Linux implementation note:
- If a "linux,cma-default" property is present, then Linux will use the
region for the default pool of the contiguous memory allocator.