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-rw-r--r--Documentation/admin-guide/dynamic-debug-howto.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/admin-guide/dynamic-debug-howto.rst b/Documentation/admin-guide/dynamic-debug-howto.rst
index 252e5ef324e5..0dc2eb8e44e5 100644
--- a/Documentation/admin-guide/dynamic-debug-howto.rst
+++ b/Documentation/admin-guide/dynamic-debug-howto.rst
@@ -54,6 +54,9 @@ If you make a mistake with the syntax, the write will fail thus::
<debugfs>/dynamic_debug/control
-bash: echo: write error: Invalid argument
+Note, for systems without 'debugfs' enabled, the control file can be
+found in ``/proc/dynamic_debug/control``.
+
Viewing Dynamic Debug Behaviour
===============================