migration-guides: add notes on systemd/usrmerge changes

(From yocto-docs rev: ab14362b9d1fc70a55beaeed9373f1be474805b0)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/documentation/migration-guides/migration-4.3.rst b/documentation/migration-guides/migration-4.3.rst
index f526e366ce..79cf907708 100644
--- a/documentation/migration-guides/migration-4.3.rst
+++ b/documentation/migration-guides/migration-4.3.rst
@@ -55,6 +55,13 @@ Go language changes
 -  Support for the Glide package manager has been removed, as ``go mod``
    has become the standard.
 
+Systemd changes
+~~~~~~~~~~~~~~~
+
+Upstream systemd is now more strict on filesystem layout and the ``usrmerge``
+feature is therefore required alongside systemd. The Poky test configurations
+have been updated accordingly for systemd.
+
 .. _migration-4.3-recipe-changes:
 
 Recipe changes