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

[Nicolas Schier <nsc@kernel.org>]

On Tue, May 05, 2026 at 10:29:54AM -0500, Mario Limonciello (AMD) wrote:
> 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".

Do you see a real need for that?  (We should prevent adding
complexity when it's not neccessary.)

> +
>  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
> 

Did you test that patch?

These changes are not enough, as scripts/package/builddeb does not pick
up the non-standard binary package name in its final 'case', and thus,
_no_ binary package will be generated if KDEB_PACKAGENAME !=
"linux-image".

Kind regards,
Nicolas