ref-manual: Added KERNEL_IMAGE_BASE_NAME change to 2.2 migration

The fact that the OpenEmbedded build system can now build
multiple image types caused the KERNEL_IMAGE_BASE_NAME variable
to have the KERNEL_IMAGETYPE portion removed.  This could cause
existing recipes that use the KERNEL_IMAGE_BASE_NAME variable
directly issues.  I added a section indicating that the user
should address those recipes to avoid problems.

(From yocto-docs rev: 2b4a36b45846e296c15d62ee8fabdd9ff29b2b0f)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/documentation/ref-manual/migration.xml b/documentation/ref-manual/migration.xml
index f9e418c769..2bdb542ec1 100644
--- a/documentation/ref-manual/migration.xml
+++ b/documentation/ref-manual/migration.xml
@@ -3620,6 +3620,27 @@ $ runqemu qemux86-64 tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.
         </para>
     </section>
 
+    <section id='migration-2.2-kernel-image-base-name-no-longer-uses-kernel-imagetype'>
+        <title><filename>KERNEL_IMAGE_BASE_NAME</filename> no Longer Uses <filename>KERNEL_IMAGETYPE</filename></title>
+
+        <para>
+            The
+            <link linkend='var-KERNEL_IMAGE_BASE_NAME'><filename>KERNEL_IMAGE_BASE_NAME</filename></link>
+            variable no longer uses the
+            <link linkend='var-KERNEL_IMAGETYPE'><filename>KERNEL_IMAGETYPE</filename></link>
+            variable to create the image's base name.
+            Because the OpenEmbedded build system can now build multiple kernel
+            image types, this part of the kernel image base name as been
+            removed leaving only the following:
+            <literallayout class='monospaced'>
+     KERNEL_IMAGE_BASE_NAME ?= "${PKGE}-${PKGV}-${PKGR}-${MACHINE}-${DATETIME}
+            </literallayout>
+            If you have recipes or classes that use
+            <filename>KERNEL_IMAGE_BASE_NAME</filename> directly, you might
+            need to update the references to ensure they continue to work.
+        </para>
+    </section>
+
     <section id='migration-2.2-bitbake-changes'>
         <title>BitBake Changes</title>