[PATCH] kbuild: deb-pkg: Allow setting package name at build

["Mario Limonciello (AMD)" <superm1@kernel.org>]

Users can change the source package by setting variable `KDEB_SOURCENAME`,
but the binary package name is hardcoded.

Add support for setting binary package name by using `KDEB_PACKAGENAME`
and let it affect both kernel image and debug image packages.

Update kbuild documentation to include defaults and mention both
`KDEB_PACKAGENAME` and `KDEB_SOURCENAME`.

Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
---
 Documentation/kbuild/kbuild.rst | 10 ++++++++++
 scripts/package/mkdebian        |  6 ++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Documentation/kbuild/kbuild.rst b/Documentation/kbuild/kbuild.rst
index 5a9013bacfb75..cbdd2224c3a55 100644
--- a/Documentation/kbuild/kbuild.rst
+++ b/Documentation/kbuild/kbuild.rst
@@ -177,6 +177,16 @@ the UTS_MACHINE variable, and on some architectures also the kernel config.
 The value of KBUILD_DEBARCH is assumed (not checked) to be a valid Debian
 architecture.
 
+KDEB_SOURCENAME
+----------------
+For the deb-pkg target, allows overriding the default source package name.
+The default package name is "linux-upstream".
+
+KDEB_PACKAGENAME
+----------------
+For the deb-pkg target, allows overriding the default binary package name.
+The default package name is "linux-image".
+
 KDOCFLAGS
 ---------
 Specify extra (warning/error) flags for kernel-doc checks during the build,
diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index d4b007b38a475..cbe4266fac732 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -166,7 +166,9 @@ else
 fi
 sourcename=${KDEB_SOURCENAME:-linux-upstream}
 
-if [ "$ARCH" = "um" ] ; then
+if [ "${KDEB_PACKAGENAME:+set}" ]; then
+	packagename=$KDEB_PACKAGENAME
+elif [ "$ARCH" = "um" ]; then
 	packagename=user-mode-linux
 else
 	packagename=linux-image
@@ -252,7 +254,7 @@ fi
 if is_enabled CONFIG_DEBUG_INFO; then
 cat <<EOF >> debian/control
 
-Package: linux-image-${KERNELRELEASE}-dbg
+Package: $packagename-${KERNELRELEASE}-dbg
 Section: debug
 Architecture: $debarch
 Build-Profiles: <!pkg.${sourcename}.nokerneldbg>
-- 
2.53.0