kernel-dev: add disable config example

Makes it more clear that the configuration fragment can also be used to
disable a configuration.

(From yocto-docs rev: a586a0ecacb4e40f4f3aeeb01dbefbdfcee8ae35)

Signed-off-by: Walter Werner SCHNEIDER <contact@schnwalter.eu>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit d38ef467081ee73bf23f240ace54b849a3a87612)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/documentation/kernel-dev/common.rst b/documentation/kernel-dev/common.rst
index bd6c3fb2cf..9ff6ec221b 100644
--- a/documentation/kernel-dev/common.rst
+++ b/documentation/kernel-dev/common.rst
@@ -1191,10 +1191,12 @@ appear in the ``.config`` file, which is in the :term:`Build Directory`.
 
 It is simple to create a configuration fragment. One method is to use
 shell commands. For example, issuing the following from the shell
-creates a configuration fragment file named ``my_smp.cfg`` that enables
-multi-processor support within the kernel::
+creates a configuration fragment file named ``my_changes.cfg`` that enables
+multi-processor support within the kernel and disables the FPGA
+Configuration Framework::
 
-   $ echo "CONFIG_SMP=y" >> my_smp.cfg
+   $ echo "CONFIG_SMP=y" >> my_changes.cfg
+   $ echo "# CONFIG_FPGA is not set" >> my_changes.cfg
 
 .. note::