[PATCH 1/2] ref-manual/variables.rst: document the IMAGE_CONTAINER_NO_DUMMY variable

[Antonin Godard <antonin.godard@bootlin.com>]

Added in OE-Core with commit f0645e172bb8 ("image-container.bbclass:
Error if not using linux-dummy").

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
---
 documentation/ref-manual/variables.rst | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 71fe11b83..ac7b85992 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -3955,6 +3955,13 @@ system and gives an overview of their function and contents.
       variable, see the :ref:`ref-classes-image_types`
       class file, which is ``meta/classes-recipe/image_types.bbclass``.
 
+   :term:`IMAGE_CONTAINER_NO_DUMMY`
+      When inheriting the :ref:`ref-classes-image-container` class, this variable
+      can be set to "1" to allow a :term:`PREFERRED_PROVIDER` for the Linux kernel
+      (``virtual/kernel``) different than ``linux-dummy``.
+
+      This variable should be set from a :term:`Configuration File`.
+
    :term:`IMAGE_DEVICE_TABLES`
       Specifies one or more files that contain custom device tables that
       are passed to the ``makedevs`` command as part of creating an image.

-- 
2.51.0