linux-kernel - Re: [PATCH v2] kbuild: deb-pkg: don't set KBUILD_BUILD

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Message-ID: <CAK7LNASL=t4Lm5kdTqiLeBnB8dsZ81EK52Nw7=sHOvPdpW7r5A@mail.gmail.com>
Date: Sun, 23 Mar 2025 01:08:26 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Alexandru Gagniuc <alexandru.gagniuc@...com>
Cc: nathan@...nel.org, linux-kbuild@...r.kernel.org, nicolas@...sle.eu, 
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2] kbuild: deb-pkg: don't set KBUILD_BUILD_VERSION unconditionally

On Tue, Mar 18, 2025 at 7:42 AM Alexandru Gagniuc
<alexandru.gagniuc@...com> wrote:
>
> In ThinPro, we use the convention <upstream_ver>+hp<patchlevel> for
> the kernel package. This does not have a dash in the name or version.
> This is built by editing ".version" before a build, and setting
> EXTRAVERSION="+hp" and KDEB_PKGVERSION make variables:
>
>     echo 68 > .version
>     make -j<n> EXTRAVERSION="+hp" bindeb-pkg KDEB_PKGVERSION=6.12.2+hp69
>
>     .deb name: linux-image-6.12.2+hp_6.12.2+hp69_amd64.deb
>
> Since commit 7d4f07d5cb71 ("kbuild: deb-pkg: squash
> scripts/package/deb-build-option to debian/rules"), this no longer
> works. The deb build logic changed, even though, the commit message
> implies that the logic should be unmodified.
>
> Before, KBUILD_BUILD_VERSION was not set if the KDEB_PKGVERSION did
> not contain a dash. After the change KBUILD_BUILD_VERSION is always
> set to KDEB_PKGVERSION. Since this determines UTS_VERSION,the uname
> output to look off:
>
>     (now)      uname -a: version 6.12.2+hp ... #6.12.2+hp69
>     (expected) uname -a: version 6.12.2+hp ... #69
>
> Update the debian/rules logic to restore the original behavior.
>
> Cc: <stable@...r.kernel.org>
> Fixes: 7d4f07d5cb71 ("kbuild: deb-pkg: squash scripts/package/deb-build-option to debian/rules")
> Signed-off-by: Alexandru Gagniuc <alexandru.gagniuc@...com>
> Reviewed-by: Nicolas Schier <nicolas@...sle.eu>
> ---
> Changes since v1:
>  * Rework logic so that dpkg-parsechangelog is invoked just once
>  * Adjust commit message to reflect review feedback
>
>  scripts/package/debian/rules | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/scripts/package/debian/rules b/scripts/package/debian/rules
> index ca07243bd5cd..d1f400685682 100755
> --- a/scripts/package/debian/rules
> +++ b/scripts/package/debian/rules
> @@ -21,9 +21,11 @@ ifeq ($(origin KBUILD_VERBOSE),undefined)
>      endif
>  endif
>
> -revision = $(lastword $(subst -, ,$(shell dpkg-parsechangelog -S Version)))
> +revision = $(shell dpkg-parsechangelog -S Version | sed -n 's/.*-//p')
>  CROSS_COMPILE ?= $(filter-out $(DEB_BUILD_GNU_TYPE)-, $(DEB_HOST_GNU_TYPE)-)
> -make-opts = ARCH=$(ARCH) KERNELRELEASE=$(KERNELRELEASE) KBUILD_BUILD_VERSION=$(revision) $(addprefix CROSS_COMPILE=,$(CROSS_COMPILE))
> +make-opts = ARCH=$(ARCH) KERNELRELEASE=$(KERNELRELEASE) $(addprefix \
> +               KBUILD_BUILD_VERSION=,$(revision)) $(addprefix \
> +               CROSS_COMPILE=,$(CROSS_COMPILE))



Applied to linux-kbuild.

I fixed the place for wrapping for readability.
(In my previous reply, the code was wrapped by Gmail
 in unintended places)

Thanks.






>  binary-targets := $(addprefix binary-, image image-dbg headers libc-dev)
>
> --
> 2.48.1
>


-- 
Best Regards
Masahiro Yamada