linux-kernel - [PATCH] kbuild: Restore .version auto-increment behaviour for Debian packages

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Message-Id: <20221115220453.3463096-1-maz@kernel.org>
Date:   Tue, 15 Nov 2022 22:04:53 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: [PATCH] kbuild: Restore .version auto-increment behaviour for Debian packages

Since 2df8220cc511 ("kbuild: build init/built-in.a just once"),
generating Debian packages using 'make bindeb-pkg' results in
packages that are stuck to the same .version, leading to unexpected
behaviours (multiple packages with the same version).

That's because the mkdebian script samples the build version
before building the kernel, and forces the use of that version
number for the actual build.

Restore the previous behaviour by calling init/build-version
instead of reading the .version file. This is likely to result
in too many .version bumps, but this is what was happening before
(although the bump was affecting builds made after the current one).

Eventually, this script should be turned into something that
is a bit less counter-intuitive (building the kernel first
and only then generating the packaging artefacts).

Fixes: 2df8220cc511 ("kbuild: build init/built-in.a just once")
Signed-off-by: Marc Zyngier <maz@...nel.org>
Cc: Masahiro Yamada <masahiroy@...nel.org>
Cc: Michal Marek <michal.lkml@...kovi.net>
Cc: Nick Desaulniers <ndesaulniers@...gle.com>
---

Notes:
    v2: Drop the RPM version which was wrong, and make the path
        relative to $srctree.

 scripts/package/mkdebian | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index 60a2a63a5e90..a3ac5a716e9f 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -90,7 +90,7 @@ if [ -n "$KDEB_PKGVERSION" ]; then
 	packageversion=$KDEB_PKGVERSION
 	revision=${packageversion##*-}
 else
-	revision=$(cat .version 2>/dev/null||echo 1)
+	revision=$($srctree/init/build-version)
 	packageversion=$version-$revision
 fi
 sourcename=$KDEB_SOURCENAME
-- 
2.34.1