ref-manual: clarify KCONFIG_MODE default behaviour

KCONFIG_MODE defaults to 'allnoconfig' when not set, regardless of whether
KBUILD_DEFCONFIG points to an in-tree or a meta-layer defconfig.

(From yocto-docs rev: 5a35f8bd19cca200c6b271f049fb94543de79f06)

Signed-off-by: Carlos Sánchez de La Lama <csanchezdll@gmail.com>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit f374b9c426f6c10710e011a4ad660231ee26efb8)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 2 insertions, 9 deletions

diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index eb174afe53..6ec9866063 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -4277,15 +4277,8 @@ system and gives an overview of their function and contents.
       options not explicitly specified will be disabled in the kernel
       config.
 
-      In case :term:`KCONFIG_MODE` is not set the behaviour will depend on where
-      the ``defconfig`` file is coming from. An "in-tree" ``defconfig`` file
-      will be handled in ``alldefconfig`` mode, a ``defconfig`` file placed
-      in ``${WORKDIR}`` through a meta-layer will be handled in
-      ``allnoconfig`` mode.
-
-      An "in-tree" ``defconfig`` file can be selected via the
-      :term:`KBUILD_DEFCONFIG` variable. :term:`KCONFIG_MODE` does not need to
-      be explicitly set.
+      In case :term:`KCONFIG_MODE` is not set the ``defconfig`` file
+      will be handled in ``allnoconfig`` mode.
 
       A ``defconfig`` file compatible with ``allnoconfig`` mode can be
       generated by copying the ``.config`` file from a working Linux kernel