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# Maintainer: graysky <graysky AT archlinux DOT us>
# Contributor: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>

### BUILD OPTIONS
# Set these variables to ANYTHING that is not null to enable them

# Tweak kernel options prior to a build via nconfig
_makenconfig=

# Optionally select a sub architecture by number if building in a clean chroot
# Leaving this entry blank will require user interaction during the build
# which will cause a failure to build if using makechrootpkg. Note that the
# generic (default) option is 30.
#
# Note - the march=native option is unavailable by this method, use the nconfig
# and manually select it.
#
#  1. AMD Opteron/Athlon64/Hammer/K8 (MK8)
#  2. AMD Opteron/Athlon64/Hammer/K8 with SSE3 (MK8SSE3)
#  3. AMD 61xx/7x50/PhenomX3/X4/II/K10 (MK10)
#  4. AMD Barcelona (MBARCELONA)
#  5. AMD Bobcat (MBOBCAT)
#  6. AMD Jaguar (MJAGUAR)
#  7. AMD Bulldozer (MBULLDOZER)
#  8. AMD Piledriver (MPILEDRIVER)
#  9. AMD Steamroller (MSTEAMROLLER)
#  10. AMD Excavator (MEXCAVATOR)
#  11. AMD Zen (MZEN)
#  12. AMD Zen 2 (MZEN2)
#  13. Intel P4 / older Netburst based Xeon (MPSC)
#  14. Intel Atom (MATOM)
#  15. Intel Core 2 (MCORE2)
#  16. Intel Nehalem (MNEHALEM)
#  17. Intel Westmere (MWESTMERE)
#  18. Intel Silvermont (MSILVERMONT)
#  19. Intel Goldmont (MGOLDMONT)
#  20. Intel Goldmont Plus (MGOLDMONTPLUS)
#  21. Intel Sandy Bridge (MSANDYBRIDGE)
#  22. Intel Ivy Bridge (MIVYBRIDGE)
#  23. Intel Haswell (MHASWELL)
#  24. Intel Broadwell (MBROADWELL)
#  25. Intel Skylake (MSKYLAKE)
#  26. Intel Skylake X (MSKYLAKEX)
#  27. Intel Cannon Lake (MCANNONLAKE)
#  28. Intel Ice Lake (MICELAKE)
#  29. Intel Cascade Lake (MCASCADELAKE)
#  30. Generic-x86-64 (GENERIC_CPU)
#  31. Native optimizations autodetected by GCC (MNATIVE)
_subarch=

# Compile ONLY used modules to VASTLYreduce the number of modules built
# and the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD read the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
_localmodcfg=

### IMPORTANT: Do no edit below this line unless you know what you're doing

pkgbase=linux-ck
pkgver=5.5.13
pkgrel=1
_ckpatchversion=1
arch=(x86_64)
url="https://wiki.archlinux.org/index.php/Linux-ck"
license=(GPL2)
makedepends=(
  bc kmod libelf
)
options=('!strip')
_ckpatch="patch-5.5-ck${_ckpatchversion}"
_gcc_more_v='20191217'
source=(
  "https://www.kernel.org/pub/linux/kernel/v5.x/linux-$pkgver.tar".{xz,sign}
  config         # the main kernel config file
  "enable_additional_cpu_optimizations-$_gcc_more_v.tar.gz::https://github.com/graysky2/kernel_gcc_patch/archive/$_gcc_more_v.tar.gz"
  "http://ck.kolivas.org/patches/5.0/5.5/5.5-ck${_ckpatchversion}/$_ckpatch.xz"
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch
  0003-drm-Remove-PageReserved-manipulation-from-drm_pci_al.patch
  0004-drm-i915-Serialise-i915_active_acquire-with-__active.patch
  0005-drm-i915-gem-Take-runtime-pm-wakeref-prior-to-unbind.patch
  0006-drm-i915-gem-Avoid-parking-the-vma-as-we-unbind.patch
  0007-drm-i915-gem-Try-to-flush-pending-unbind-events.patch
  0008-drm-i915-gem-Reinitialise-the-local-list-before-repe.patch
  0009-drm-i915-Add-a-simple-is-bound-check-before-unbindin.patch
  0010-drm-i915-Introduce-a-vma.kref.patch
  0011-iwlwifi-don-t-send-GEO_TX_POWER_LIMIT-if-no-wgds-tab.patch
)
validpgpkeys=(
  'ABAF11C65A2970B130ABE3C479BE3E4300411886'  # Linus Torvalds
  '647F28654894E3BD457199BE38DBBDC86092693E'  # Greg Kroah-Hartman
)
sha256sums=('1f3b3614a06bffc9c621c82f98d8ca88c60538a8c6dd77f96f2e7fee310a4ee2'
            'SKIP'
            'a841aa011edf6bae0ffbe8ead8177e5056de5a6d7333bb96e16917903de4d868'
            '7a4a209de815f4bae49c7c577c0584c77257e3953ac4324d2aa425859ba657f5'
            '37a9d61e8a0b5a73992e1397c3a9cc947d39e715f205f3c665eb157b96d58f98'
            '566bc20e90afbac7d3836e5ccf32eca927858dda45b18431c6c91d46ae494c70'
            'e40d89048087c139359cf12798d5cbab3b5077e903d7b1cb78e6a5269d92013f'
            '00496b895c63f6fd73e292ead6634de4e7a8187fa0bd11eb5700ec6ef1a3c259'
            '1a92cefbc60cd3bbc404267f6a42329e25ca0265bbff92b84f42ef668edef85f'
            '8e171645648ce9c853663751da4163e53e052763a8a90a6a127118b2b50d613c'
            '29ab130f003665ba4a9f0051e4b28ded7c58ecc642f6f2fc937b74c20bafb00a'
            'fb5f39f4cb9f1f356d078d909c479774d717174aa07c94eb98c66f0889ddf719'
            '5121de6344e3c44b5bd37ba6ac22f2c2d42632abf5d2d678f2e1a74a5cdfe5ca'
            '1b8896c1944b549dd32e27439faef82dc2366f26916c445e6950ea3a764cc8a9'
            '220800dfa73834230ee0c321120ab18cf14a304a437c7f985f582758c5853e67'
            'c00c5b6f45cb92512eaead6ae01d5b8c07b91cc8a83ae6ef961d6a6ce3ea90be')

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 linux-${pkgver}

  echo "Setting version..."
  scripts/setlocalversion --save-scmversion
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux}" > localversion.20-pkgname

  local src
  for src in "${source[@]}"; do
    src="${src%%::*}"
    src="${src##*/}"
    [[ $src = 0*.patch ]] || continue
    echo "Applying patch $src..."
    patch -Np1 < "../$src"
  done

  echo "Setting config..."
  cp ../config .config

  # https://bbs.archlinux.org/viewtopic.php?pid=1824594#p1824594
  sed -i -e 's/# CONFIG_PSI_DEFAULT_DISABLED is not set/CONFIG_PSI_DEFAULT_DISABLED=y/' ./.config

  # https://bbs.archlinux.org/viewtopic.php?pid=1863567#p1863567
  sed -i -e '/CONFIG_LATENCYTOP=/ s,y,n,' \
      -i -e '/CONFIG_SCHED_DEBUG=/ s,y,n,' ./.config

  # fix naming schema in EXTRAVERSION of ck patch set
  sed -i -re "s/^(.EXTRAVERSION).*$/\1 = /" "../${_ckpatch}"

  echo "Patching with ck patchset..."

  # ck patchset itself
  patch -Np1 -i ../"${_ckpatch}"

  # non-interactively apply ck1 default options
  # this isn't redundant if we want a clean selection of subarch below
  make olddefconfig

  # https://github.com/graysky2/kernel_gcc_patch
  echo "Applying enable_additional_cpu_optimizations_for_gcc_v9.1+_kernel_v5.5+.patch"
  patch -Np1 -i "$srcdir/kernel_gcc_patch-$_gcc_more_v/enable_additional_cpu_optimizations_for_gcc_v9.1+_kernel_v5.5+.patch"

  if [ -n "$_subarch" ]; then
    # user wants a subarch so apply choice defined above interactively via 'yes'
    yes "$_subarch" | make oldconfig
  else
    # no subarch defined so allow user to pick one
    make oldconfig
  fi

  ### Optionally load needed modules for the make localmodconfig
  # See https://aur.archlinux.org/packages/modprobed-db
    if [ -n "$_localmodcfg" ]; then
      if [ -f $HOME/.config/modprobed.db ]; then
        echo "Running Steven Rostedt's make localmodconfig now"
        make LSMOD=$HOME/.config/modprobed.db localmodconfig
      else
        echo "No modprobed.db data found"
        exit
      fi
    fi

  make -s kernelrelease > version
  echo "Prepared $pkgbase version $(<version)"

  [[ -z "$_makenconfig" ]] || make nconfig

  # save configuration for later reuse
  cat .config > "${startdir}/config.last"
}

build() {
  cd linux-${pkgver}
  make all
}

_package() {
  pkgdesc="The ${pkgbase/linux/Linux} kernel and modules with the ck1 patchset featuring MuQSS CPU scheduler"
  depends=(coreutils kmod initramfs)
  optdepends=('crda: to set the correct wireless channels of your country'
              'linux-firmware: firmware images needed for some devices')
  provides=("linux-ck=${pkgver}")
  #groups=('ck-generic')

  cd linux-${pkgver}

  local kernver="$(<version)"
  local modulesdir="$pkgdir/usr/lib/modules/$kernver"

  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"
  #
  # hard-coded path in case user defined CC=xxx for build which causes errors
  # see this FS https://bugs.archlinux.org/task/64315
  install -Dm644 arch/x86/boot/bzImage "$modulesdir/vmlinuz"

  # Used by mkinitcpio to name the kernel
  echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"

  echo "Installing modules..."
  make INSTALL_MOD_PATH="$pkgdir/usr" modules_install

  # remove build and source links
  rm "$modulesdir"/{source,build}

  echo "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

_package-headers() {
  pkgdesc="Headers and scripts for building modules for ${pkgbase/linux/Linux} kernel"
  depends=('linux-ck') # added to keep kernel and headers packages matched
  provides=("linux-ck-headers=${pkgver}" "linux-headers=${pkgver}")
  #groups=('ck-generic')

  cd linux-${pkgver}
  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

  echo "Installing build files..."
  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
    localversion.* version vmlinux
  install -Dt "$builddir/kernel" -m644 kernel/Makefile
  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
  cp -t "$builddir" -a scripts

  # add objtool for external module building and enabled VALIDATION_STACK option
  install -Dt "$builddir/tools/objtool" tools/objtool/objtool

  # add xfs and shmem for aufs building
  mkdir -p "$builddir"/{fs/xfs,mm}

  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

  # http://bugs.archlinux.org/task/13146
  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

  # http://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

  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 "$(file -bi "$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 "Adding symlink..."
  mkdir -p "$pkgdir/usr/src"
  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"

  echo "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

pkgname=("$pkgbase" "$pkgbase-headers")
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: