extra/linux-pae: Convert to use patching mechanism

The idea is that since we already have to maintain the patches for the
linux package, we might as well use the same for other kernels.

Despite the initial added complexity, it should make updating all kernel
packages much easier.

1 files changed, 242 insertions, 0 deletions

diff --git a/extra/linux-pae/PKGBUILD_upstream_linux b/extra/linux-pae/PKGBUILD_upstream_linux
new file mode 100644
index 00000000..64753de7
--- /dev/null
+++ b/extra/linux-pae/PKGBUILD_upstream_linux
@@ -0,0 +1,242 @@
+# Maintainer: Jan Alexander Steffens (heftig) <heftig@archlinux.org>
+
+pkgbase=linux
+pkgver=6.7.7.arch1
+pkgrel=1
+pkgdesc='Linux'
+url='https://github.com/archlinux/linux'
+arch=(x86_64)
+license=(GPL2)
+makedepends=(
+  bc
+  cpio
+  gettext
+  libelf
+  pahole
+  perl
+  python
+  tar
+  xz
+
+  # htmldocs
+  graphviz
+  imagemagick
+  python-sphinx
+  texlive-latexextra
+)
+options=('!strip')
+_srcname=linux-${pkgver%.*}
+_srctag=v${pkgver%.*}-${pkgver##*.}
+source=(
+  https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/${_srcname}.tar.{xz,sign}
+  $url/releases/download/$_srctag/linux-$_srctag.patch.zst{,.sig}
+  config  # the main kernel config file
+)
+validpgpkeys=(
+  ABAF11C65A2970B130ABE3C479BE3E4300411886  # Linus Torvalds
+  647F28654894E3BD457199BE38DBBDC86092693E  # Greg Kroah-Hartman
+  83BC8889351B5DEBBB68416EB8AC08600F108CDF  # Jan Alexander Steffens (heftig)
+)
+# https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
+sha256sums=('256b8b44570ddbe266eb3ad0c2cba2616f1609b4a3de5014a3da5512907b14d9'
+            'SKIP'
+            '47208683675e5ad065c9a3821aa975fdb3c37d7d7d77222da4d6f8c3f09827d1'
+            'SKIP'
+            '04143712e593d45a597661fe00f89cf92d52c62df3468c68a46c952c2ef4db64')
+b2sums=('ef97a036ab6cd421200b2e8f0a49c6b570d2269a5e182ea948d48d456e6414bfa61f5f6efa2bad65efbe811d2078a54a4edff9c27de609401160f3905fe27a22'
+        'SKIP'
+        '45e0ef14e26323bbd2457f77e4c1e9fc0c2d6fb028bb24814d38c2ebfbeaa2aee29cad2f5154df372d098856cf7f3fcd585575e5b95b93cba47ee5de9f92b8e0'
+        'SKIP'
+        '21083151bdcd0fc2bcc0475b9cd73bab5666a71f043eedd67b19a3a4c09c8253a5a06794ce9270215782f5885e05e70b5e424123f1bded7aa7a6d3f30d02a4b3')
+
+export KBUILD_BUILD_HOST=archlinux
+export KBUILD_BUILD_USER=$pkgbase
+export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
+
+prepare() {
+  cd $_srcname
+
+  echo "Setting version..."
+  echo "-$pkgrel" > localversion.10-pkgrel
+  echo "${pkgbase#linux}" > localversion.20-pkgname
+
+  local src
+  for src in "${source[@]}"; do
+    src="${src%%::*}"
+    src="${src##*/}"
+    src="${src%.zst}"
+    [[ $src = *.patch ]] || continue
+    echo "Applying patch $src..."
+    patch -Np1 < "../$src"
+  done
+
+  echo "Setting config..."
+  cp ../config .config
+  make olddefconfig
+  diff -u ../config .config || :
+
+  make -s kernelrelease > version
+  echo "Prepared $pkgbase version $(<version)"
+}
+
+build() {
+  cd $_srcname
+  make all
+  make -C tools/bpf/bpftool vmlinux.h feature-clang-bpf-co-re=1
+  make htmldocs
+}
+
+_package() {
+  pkgdesc="The $pkgdesc kernel and modules"
+  depends=(
+    coreutils
+    initramfs
+    kmod
+  )
+  optdepends=(
+    'wireless-regdb: to set the correct wireless channels of your country'
+    'linux-firmware: firmware images needed for some devices'
+  )
+  provides=(
+    KSMBD-MODULE
+    VIRTUALBOX-GUEST-MODULES
+    WIREGUARD-MODULE
+  )
+  replaces=(
+    virtualbox-guest-modules-arch
+    wireguard-arch
+  )
+
+  cd $_srcname
+  local modulesdir="$pkgdir/usr/lib/modules/$(<version)"
+
+  echo "Installing boot image..."
+  # systemd expects to find the kernel here to allow hibernation
+  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
+  install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinuz"
+
+  # Used by mkinitcpio to name the kernel
+  echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"
+
+  echo "Installing modules..."
+  ZSTD_CLEVEL=19 make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
+    DEPMOD=/doesnt/exist modules_install  # Suppress depmod
+
+  # remove build link
+  rm "$modulesdir"/build
+}
+
+_package-headers() {
+  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
+  depends=(pahole)
+
+  cd $_srcname
+  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
+
+  echo "Installing build files..."
+  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
+    localversion.* version vmlinux tools/bpf/bpftool/vmlinux.h
+  install -Dt "$builddir/kernel" -m644 kernel/Makefile
+  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
+  cp -t "$builddir" -a scripts
+
+  # required when STACK_VALIDATION is enabled
+  install -Dt "$builddir/tools/objtool" tools/objtool/objtool
+
+  # required when DEBUG_INFO_BTF_MODULES is enabled
+  install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids
+
+  echo "Installing headers..."
+  cp -t "$builddir" -a include
+  cp -t "$builddir/arch/x86" -a arch/x86/include
+  install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s
+
+  install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
+  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h
+
+  # https://bugs.archlinux.org/task/13146
+  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h
+
+  # https://bugs.archlinux.org/task/20402
+  install -Dt "$builddir/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
+  install -Dt "$builddir/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
+  install -Dt "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h
+
+  # https://bugs.archlinux.org/task/71392
+  install -Dt "$builddir/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.h
+
+  echo "Installing KConfig files..."
+  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;
+
+  echo "Removing unneeded architectures..."
+  local arch
+  for arch in "$builddir"/arch/*/; do
+    [[ $arch = */x86/ ]] && continue
+    echo "Removing $(basename "$arch")"
+    rm -r "$arch"
+  done
+
+  echo "Removing documentation..."
+  rm -r "$builddir/Documentation"
+
+  echo "Removing broken symlinks..."
+  find -L "$builddir" -type l -printf 'Removing %P\n' -delete
+
+  echo "Removing loose objects..."
+  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete
+
+  echo "Stripping build tools..."
+  local file
+  while read -rd '' file; do
+    case "$(file -Sib "$file")" in
+      application/x-sharedlib\;*)      # Libraries (.so)
+        strip -v $STRIP_SHARED "$file" ;;
+      application/x-archive\;*)        # Libraries (.a)
+        strip -v $STRIP_STATIC "$file" ;;
+      application/x-executable\;*)     # Binaries
+        strip -v $STRIP_BINARIES "$file" ;;
+      application/x-pie-executable\;*) # Relocatable binaries
+        strip -v $STRIP_SHARED "$file" ;;
+    esac
+  done < <(find "$builddir" -type f -perm -u+x ! -name vmlinux -print0)
+
+  echo "Stripping vmlinux..."
+  strip -v $STRIP_STATIC "$builddir/vmlinux"
+
+  echo "Adding symlink..."
+  mkdir -p "$pkgdir/usr/src"
+  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"
+}
+
+_package-docs() {
+  pkgdesc="Documentation for the $pkgdesc kernel"
+
+  cd $_srcname
+  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
+
+  echo "Installing documentation..."
+  local src dst
+  while read -rd '' src; do
+    dst="${src#Documentation/}"
+    dst="$builddir/Documentation/${dst#output/}"
+    install -Dm644 "$src" "$dst"
+  done < <(find Documentation -name '.*' -prune -o ! -type d -print0)
+
+  echo "Adding symlink..."
+  mkdir -p "$pkgdir/usr/share/doc"
+  ln -sr "$builddir/Documentation" "$pkgdir/usr/share/doc/$pkgbase"
+}
+
+pkgname=(
+  "$pkgbase"
+  "$pkgbase-headers"
+  "$pkgbase-docs"
+)
+for _p in "${pkgname[@]}"; do
+  eval "package_$_p() {
+    $(declare -f "_package${_p#$pkgbase}")
+    _package${_p#$pkgbase}
+  }"
+done
+
+# vim:set ts=8 sts=2 sw=2 et: