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-rw-r--r--Documentation/networking/netdevices.rst10
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diff --git a/Documentation/networking/netdevices.rst b/Documentation/networking/netdevices.rst
index 857c9784f87e..1d37038e9fbe 100644
--- a/Documentation/networking/netdevices.rst
+++ b/Documentation/networking/netdevices.rst
@@ -297,3 +297,13 @@ napi->poll:
Context:
softirq
will be called with interrupts disabled by netconsole.
+
+NETDEV_INTERNAL symbol namespace
+================================
+
+Symbols exported as NETDEV_INTERNAL can only be used in networking
+core and drivers which exclusively flow via the main networking list and trees.
+Note that the inverse is not true, most symbols outside of NETDEV_INTERNAL
+are not expected to be used by random code outside netdev either.
+Symbols may lack the designation because they predate the namespaces,
+or simply due to an oversight.