Merge tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Improve performance in gendwarfksyms

 - Remove deprecated EXTRA_*FLAGS and KBUILD_ENABLE_EXTRA_GCC_CHECKS

 - Support CONFIG_HEADERS_INSTALL for ARCH=um

 - Use more relative paths to sources files for better reproducibility

 - Support the loong64 Debian architecture

 - Add Kbuild bash completion

 - Introduce intermediate vmlinux.unstripped for architectures that need
   static relocations to be stripped from the final vmlinux

 - Fix versioning in Debian packages for -rc releases

 - Treat missing MODULE_DESCRIPTION() as an error

 - Convert Nios2 Makefiles to use the generic rule for built-in DTB

 - Add debuginfo support to the RPM package

* tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits)
  kbuild: rpm-pkg: build a debuginfo RPM
  kconfig: merge_config: use an empty file as initfile
  nios2: migrate to the generic rule for built-in DTB
  rust: kbuild: skip `--remap-path-prefix` for `rustdoc`
  kbuild: pacman-pkg: hardcode module installation path
  kbuild: deb-pkg: don't set KBUILD_BUILD_VERSION unconditionally
  modpost: require a MODULE_DESCRIPTION()
  kbuild: make all file references relative to source root
  x86: drop unnecessary prefix map configuration
  kbuild: deb-pkg: add comment about future removal of KDEB_COMPRESS
  kbuild: Add a help message for "headers"
  kbuild: deb-pkg: remove "version" variable in mkdebian
  kbuild: deb-pkg: fix versioning for -rc releases
  Documentation/kbuild: Fix indentation in modules.rst example
  x86: Get rid of Makefile.postlink
  kbuild: Create intermediate vmlinux build with relocations preserved
  kbuild: Introduce Kconfig symbol for linking vmlinux with relocations
  kbuild: link-vmlinux.sh: Make output file name configurable
  kbuild: do not generate .tmp_vmlinux*.map when CONFIG_VMLINUX_MAP=y
  Revert "kheaders: Ignore silly-rename files"
  ...

5 files changed, 78 insertions, 17 deletions

diff --git a/scripts/package/PKGBUILD b/scripts/package/PKGBUILD
index 0cf3a55b05e1..452374d63c24 100644
--- a/scripts/package/PKGBUILD
+++ b/scripts/package/PKGBUILD
@@ -53,7 +53,7 @@ build() {
 _package() {
 	pkgdesc="The ${pkgdesc} kernel and modules"
 
-	local modulesdir="${pkgdir}/usr/${MODLIB}"
+	local modulesdir="${pkgdir}/usr/lib/modules/${KERNELRELEASE}"
 
 	_prologue
 
@@ -81,7 +81,7 @@ _package() {
 _package-headers() {
 	pkgdesc="Headers and scripts for building modules for the ${pkgdesc} kernel"
 
-	local builddir="${pkgdir}/usr/${MODLIB}/build"
+	local builddir="${pkgdir}/usr/lib/modules/${KERNELRELEASE}/build"
 
 	_prologue
 
@@ -114,7 +114,7 @@ _package-debug(){
 	pkgdesc="Non-stripped vmlinux file for the ${pkgdesc} kernel"
 
 	local debugdir="${pkgdir}/usr/src/debug/${pkgbase}"
-	local builddir="${pkgdir}/usr/${MODLIB}/build"
+	local builddir="${pkgdir}/usr/lib/modules/${KERNELRELEASE}/build"
 
 	_prologue
 
diff --git a/scripts/package/debian/rules b/scripts/package/debian/rules
index ca07243bd5cd..a417a7f8bbc1 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))
 
 binary-targets := $(addprefix binary-, image image-dbg headers libc-dev)
 
@@ -41,6 +43,10 @@ package = $($(@:binary-%=%-package))
 # which package is being processed in the build log.
 DH_OPTIONS = -p$(package)
 
+# Note: future removal of KDEB_COMPRESS
+# dpkg-deb >= 1.21.10 supports the DPKG_DEB_COMPRESSOR_TYPE environment
+# variable, which provides the same functionality as KDEB_COMPRESS. The
+# KDEB_COMPRESS variable will be removed in the future.
 define binary
 	$(Q)dh_testdir $(DH_OPTIONS)
 	$(Q)dh_testroot $(DH_OPTIONS)
diff --git a/scripts/package/kernel.spec b/scripts/package/kernel.spec
index ac3e5ac01d8a..726f34e11960 100644
--- a/scripts/package/kernel.spec
+++ b/scripts/package/kernel.spec
@@ -2,8 +2,6 @@
 %{!?_arch: %define _arch dummy}
 %{!?make: %define make make}
 %define makeflags %{?_smp_mflags} ARCH=%{ARCH}
-%define __spec_install_post /usr/lib/rpm/brp-compress || :
-%define debug_package %{nil}
 
 Name: kernel
 Summary: The Linux Kernel
@@ -46,6 +44,36 @@ This package provides kernel headers and makefiles sufficient to build modules
 against the %{version} kernel package.
 %endif
 
+%if %{with_debuginfo}
+# list of debuginfo-related options taken from distribution kernel.spec
+# files
+%undefine _include_minidebuginfo
+%undefine _find_debuginfo_dwz_opts
+%undefine _unique_build_ids
+%undefine _unique_debug_names
+%undefine _unique_debug_srcs
+%undefine _debugsource_packages
+%undefine _debuginfo_subpackages
+%global _find_debuginfo_opts -r
+%global _missing_build_ids_terminate_build 1
+%global _no_recompute_build_ids 1
+%{debug_package}
+%endif
+# some (but not all) versions of rpmbuild emit %%debug_package with
+# %%install. since we've already emitted it manually, that would cause
+# a package redefinition error. ensure that doesn't happen
+%define debug_package %{nil}
+
+# later, we make all modules executable so that find-debuginfo.sh strips
+# them up. but they don't actually need to be executable, so remove the
+# executable bit, taking care to do it _after_ find-debuginfo.sh has run
+%define __spec_install_post \
+	%{?__debug_package:%{__debug_install_post}} \
+	%{__arch_install_post} \
+	%{__os_install_post} \
+	find %{buildroot}/lib/modules/%{KERNELRELEASE} -name "*.ko" -type f \\\
+		| xargs --no-run-if-empty chmod u-x
+
 %prep
 %setup -q -n linux
 cp %{SOURCE1} .config
@@ -89,8 +117,22 @@ ln -fns /usr/src/kernels/%{KERNELRELEASE} %{buildroot}/lib/modules/%{KERNELRELEA
 	echo "%exclude /lib/modules/%{KERNELRELEASE}/build"
 } > %{buildroot}/kernel.list
 
+# make modules executable so that find-debuginfo.sh strips them. this
+# will be undone later in %%__spec_install_post
+find %{buildroot}/lib/modules/%{KERNELRELEASE} -name "*.ko" -type f \
+	| xargs --no-run-if-empty chmod u+x
+
+%if %{with_debuginfo}
+# copying vmlinux directly to the debug directory means it will not get
+# stripped (but its source paths will still be collected + fixed up)
+mkdir -p %{buildroot}/usr/lib/debug/lib/modules/%{KERNELRELEASE}
+cp vmlinux %{buildroot}/usr/lib/debug/lib/modules/%{KERNELRELEASE}
+%endif
+
 %clean
 rm -rf %{buildroot}
+rm -f debugfiles.list debuglinks.list debugsourcefiles.list debugsources.list \
+	elfbins.list
 
 %post
 if [ -x /usr/bin/kernel-install ]; then
diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index b6dd98ca860b..744ddba01d93 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -77,6 +77,8 @@ set_debarch() {
 			debarch=i386
 		fi
 		;;
+	loongarch64)
+		debarch=loong64 ;;
 	esac
 	if [ -z "$debarch" ]; then
 		debarch=$(dpkg-architecture -qDEB_HOST_ARCH)
@@ -155,11 +157,12 @@ while [ $# -gt 0 ]; do
 done
 
 # Some variables and settings used throughout the script
-version=$KERNELRELEASE
 if [ "${KDEB_PKGVERSION:+set}" ]; then
 	packageversion=$KDEB_PKGVERSION
 else
-	packageversion=$(${srctree}/scripts/setlocalversion --no-local ${srctree})-$($srctree/scripts/build-version)
+	upstream_version=$("${srctree}/scripts/setlocalversion" --no-local "${srctree}" | sed 's/-\(rc[1-9]\)/~\1/')
+	debian_revision=$("${srctree}/scripts/build-version")
+	packageversion=${upstream_version}-${debian_revision}
 fi
 sourcename=${KDEB_SOURCENAME:-linux-upstream}
 
@@ -212,11 +215,11 @@ Build-Depends-Arch: bc, bison, flex,
  python3:native, rsync
 Homepage: https://www.kernel.org/
 
-Package: $packagename-$version
+Package: $packagename-${KERNELRELEASE}
 Architecture: $debarch
-Description: Linux kernel, version $version
+Description: Linux kernel, version ${KERNELRELEASE}
  This package contains the Linux kernel, modules and corresponding other
- files, version: $version.
+ files, version: ${KERNELRELEASE}.
 EOF
 
 if [ "${SRCARCH}" != um ]; then
@@ -235,11 +238,11 @@ EOF
 if is_enabled CONFIG_MODULES; then
 cat <<EOF >> debian/control
 
-Package: linux-headers-$version
+Package: linux-headers-${KERNELRELEASE}
 Architecture: $debarch
 Build-Profiles: <!pkg.${sourcename}.nokernelheaders>
-Description: Linux kernel headers for $version on $debarch
- This package provides kernel header files for $version on $debarch
+Description: Linux kernel headers for ${KERNELRELEASE} on $debarch
+ This package provides kernel header files for ${KERNELRELEASE} on $debarch
  .
  This is useful for people who need to build external modules
 EOF
@@ -249,11 +252,11 @@ fi
 if is_enabled CONFIG_DEBUG_INFO; then
 cat <<EOF >> debian/control
 
-Package: linux-image-$version-dbg
+Package: linux-image-${KERNELRELEASE}-dbg
 Section: debug
 Architecture: $debarch
 Build-Profiles: <!pkg.${sourcename}.nokerneldbg>
-Description: Linux kernel debugging symbols for $version
+Description: Linux kernel debugging symbols for ${KERNELRELEASE}
  This package will come in handy if you need to debug the kernel. It provides
  all the necessary debug symbols for the kernel and its modules.
 EOF
diff --git a/scripts/package/mkspec b/scripts/package/mkspec
index 4dc1466dfc81..c7375bfc25a9 100755
--- a/scripts/package/mkspec
+++ b/scripts/package/mkspec
@@ -23,6 +23,16 @@ else
 echo '%define with_devel 0'
 fi
 
+# debuginfo package generation uses find-debuginfo.sh under the hood,
+# which only works on uncompressed modules that contain debuginfo
+if grep -q CONFIG_DEBUG_INFO=y include/config/auto.conf &&
+   (! grep -q CONFIG_MODULE_COMPRESS=y include/config/auto.conf) &&
+   (! grep -q CONFIG_DEBUG_INFO_SPLIT=y include/config/auto.conf); then
+echo '%define with_debuginfo %{?_without_debuginfo: 0} %{?!_without_debuginfo: 1}'
+else
+echo '%define with_debuginfo 0'
+fi
+
 cat<<EOF
 %define ARCH ${ARCH}
 %define KERNELRELEASE ${KERNELRELEASE}