linux-kernel - [PATCH] kbuild: rpm-pkg: fix rpmbuild warnings for kernel.spec

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Date: Mon, 10 Jun 2024 12:38:56 -0400
From: Rafael Aquini <aquini@...hat.com>
To: linux-kbuild@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>
Subject: [PATCH] kbuild: rpm-pkg: fix rpmbuild warnings for kernel.spec

Newer revisions of rpmbuild are throwing warnings about the current
kernel.spec template having an unversioned kernel-headers in the
'Obsoletes:' field and not being able to source the epoch's date from
the spec's missing '%changelog' section:

  $ make srcrpm-pkg
    UPD     include/config/kernel.release
    GEN     rpmbuild/SPECS/kernel.spec
    UPD     .tmp_HEAD
    ARCHIVE linux.tar.gz
  rpmbuild -bs rpmbuild/SPECS/kernel.spec --define='_topdir /mnt/nfs/work/kernel/linux/rpmbuild'
  warning: line 34: It's not recommended to have unversioned Obsoletes: Obsoletes: kernel-headers
  warning: source_date_epoch_from_changelog set but %changelog is missing
  Wrote: /mnt/nfs/work/kernel/linux/rpmbuild/SRPMS/kernel-6.10.0_rc3-1.src.rpm

  RPM build warnings:
      line 34: It's not recommended to have unversioned Obsoletes: Obsoletes: kernel-headers
      source_date_epoch_from_changelog set but %changelog is missing

This patch addresses both RPM build warnings.

Signed-off-by: Rafael Aquini <aquini@...hat.com>
---
 scripts/package/kernel.spec | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/package/kernel.spec b/scripts/package/kernel.spec
index e095eb1e290e..4d58b29c03ad 100644
--- a/scripts/package/kernel.spec
+++ b/scripts/package/kernel.spec
@@ -1,3 +1,5 @@
+%global source_date_epoch_from_changelog 0
+
 # _arch is undefined if /usr/lib/rpm/platform/*/macros was not included.
 %{!?_arch: %define _arch dummy}
 %{!?make: %define make make}
@@ -27,7 +29,7 @@ The Linux Kernel, the operating system core itself
 %package headers
 Summary: Header files for the Linux kernel for use by glibc
 Group: Development/System
-Obsoletes: kernel-headers
+Obsoletes: kernel-headers < %{version}
 Provides: kernel-headers = %{version}
 %description headers
 Kernel-headers includes the C header files that specify the interface
-- 
2.45.1