path: root/PKGBUILD

# $Id$
# Maintainer: shmilee <shmilee.zju@gmail.com>
# Contributor: Andreas Radke <andyrtr@archlinux.org>

# longest and latest "longterm maintenance" kernel releases
# https://www.kernel.org/category/releases.html
# 4.9 Greg Kroah-Hartman 2016-12-11 2023-01
_LLL_VER=4.9
_LLL_SUBVER=136

# NUMA is optimized for multi-socket motherboards.
# A single multi-core CPU can actually run slower with NUMA enabled.
# Most users can disable NUMA.
# see, https://bugs.archlinux.org/task/31187
_NUMA_disable=y

# Add ck patch set
# http://ck.kolivas.org/patches/4.0/
# https://wiki.archlinux.org/index.php/Linux-ck
_CK_VER=1
_CK_PATCH="http://ck.kolivas.org/patches/4.0/${_LLL_VER}/${_LLL_VER}-ck${_CK_VER}/patch-${_LLL_VER}-ck${_CK_VER}.xz"

# Alternative I/O scheduler by Paolo Valente in ck patch
_BFQ_VER=v8
# Set this if you want it enabled globally i.e. for all devices in your system
# If you want it enabled on a device-by-device basis, leave this unset and see:
# https://wiki.archlinux.org/index.php/Linux-ck#How_to_enable_the_BFQ_I.2FO_Scheduler
_BFQ_enable=

# Ultra Kernel Samepage Merging
_UKSM_VER=0.1.2.6
_UKSM_COMMIT=676f9bb2a6da8705e463adc2161f70e00f150238
_UKSM_PATCH="https://raw.githubusercontent.com/dolohow/uksm/${_UKSM_COMMIT}/uksm-${_LLL_VER}.patch"

# CJKTTY patch 
# https://github.com/Gentoo-zh/linux-cjktty
# https://github.com/torvalds/linux/compare/v4.9...Gentoo-zh:4.9-utf8
_CJKTTY_PATCH_FILE=linux-cjktty-${_LLL_VER}.patch
_CJKTTY_PATCH_URL="https://github.com/torvalds/linux/compare/v${_LLL_VER}...Gentoo-zh:${_LLL_VER}-utf8.patch"
_CJKTTY_PATCH="${_CJKTTY_PATCH_FILE}::${_CJKTTY_PATCH_URL}"

_PATHSET_DESC="ck${_CK_VER} bfq-${_BFQ_VER} uksm-${_UKSM_VER} and cjktty"


pkgbase=linux-shmilee
pkgname=("${pkgbase}" "${pkgbase}-headers" "${pkgbase}-docs")
_srcname=linux-${_LLL_VER}
pkgver=${_LLL_VER}.${_LLL_SUBVER}
pkgrel=1
arch=('x86_64')
url="https://www.kernel.org/"
license=('GPL2')
makedepends=('xmlto' 'kmod' 'inetutils' 'bc' 'libelf')
options=('!strip')
source=(
        "https://www.kernel.org/pub/linux/kernel/v4.x/${_srcname}.tar.xz"
        "https://www.kernel.org/pub/linux/kernel/v4.x/${_srcname}.tar.sign"
        "https://www.kernel.org/pub/linux/kernel/v4.x/patch-${pkgver}.xz"
        #"https://www.kernel.org/pub/linux/kernel/v4.x/patch-${pkgver}.sign"
        ${_CK_PATCH}
        'ck-patch-for-4.9.117+.patch'
        'ck-patch-for-4.9.135+.patch'
        ${_UKSM_PATCH}
        ${_CJKTTY_PATCH}
        'linux-cjktty-patch-for-4.9.112+.patch'
        'config'         # the main kernel config file
        '60-linux.hook'  # pacman hook for depmod
        '90-linux.hook'  # pacman hook for initramfs regeneration
        'linux.preset'   # standard config files for mkinitcpio ramdisk
)
validpgpkeys=(
              'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
              '647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman 
)
# https://www.kernel.org/pub/linux/kernel/v4.x/sha256sums.asc
sha256sums=('029098dcffab74875e086ae970e3828456838da6e0ba22ce3f64ef764f3d7f1a'
            'SKIP'
            '9ca1d89c5997ab84b16bbe1e7dabe916751f934ab6e8cc0ad0743a7ea11c813d'
            '5b9d8f4ef73f87e8595de66ccc38bad86e290fd9453bd536b9cc950f5344b82d'
            '83083a6afc8be5504629049d6659beb6d2e8412a50db4caa4c1bec2a0d3ec2d7'
            'a020096879c2a2b7f041cc34e4f4970fbb7af9fdad6903987fa80864bd00fcb3'
            '65fae53b7ac44a9f3ffdcf5722e70f248ffcc183583b686066a766d27f269e1d'
            '41acf07ce9316ec2d4149331e92223dc59d2f2090efb7b71cd96522a5ba9bf48'
            'afda821d57be33c5e93390e353b1aa99bd0bd41dff70feac90249097b9b44ea9'
            'e1c3a3dc250cd6abcbc7dd6c646a324e7b9960210fbf170c829f29e4f426cc07'
            'ae2e95db94ef7176207c690224169594d49445e04249d2499e9d2fbc117a0b21'
            '75f99f5239e03238f88d1a834c50043ec32b1dc568f2cc291b07d04718483919'
            'ad6344badc91ad0630caacde83f7f9b97276f80d26a20619a87952be65492c65')

_kernelname=${pkgbase#linux}

prepare() {
  cd ${_srcname}

  # add upstream patch
  patch -p1 -i ../patch-${pkgver}

  # add latest fixes from stable queue, if needed
  # http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git

  # fix naming schema in EXTRAVERSION of ck patch set
  sed -i -re "s/^(.EXTRAVERSION).*$/\1 = /" "../patch-${_LLL_VER}-ck${_CK_VER}"
  # Patch source with ck patch set
  msg "Patching source with ck${_CK_VER} including BFS BFQ"
  cp "../patch-${_LLL_VER}-ck${_CK_VER}" "../patch-${_LLL_VER}.${_LLL_SUBVER}-ck${_CK_VER}"
  patch -i ../ck-patch-for-4.9.117+.patch "../patch-${_LLL_VER}.${_LLL_SUBVER}-ck${_CK_VER}"
  patch -i ../ck-patch-for-4.9.135+.patch "../patch-${_LLL_VER}.${_LLL_SUBVER}-ck${_CK_VER}"
  patch -Np1 -i "../patch-${_LLL_VER}.${_LLL_SUBVER}-ck${_CK_VER}"

  msg "Patching source with uksm ${_UKSM_VER} patches"
  cp "../uksm-${_LLL_VER}.patch" "../uksm-${_LLL_VER}.${_LLL_SUBVER}.patch"
  patch -Np1 -i "../uksm-${_LLL_VER}.${_LLL_SUBVER}.patch"

  msg "Patching source with Gentoo-zh/linux-cjktty patches"
  cp "../${_CJKTTY_PATCH_FILE}" "../${_CJKTTY_PATCH_FILE}.${_LLL_SUBVER}.patch"
  patch -i ../linux-cjktty-patch-for-4.9.112+.patch "../${_CJKTTY_PATCH_FILE}.${_LLL_SUBVER}.patch"
  patch -Np1 -i "../${_CJKTTY_PATCH_FILE}.${_LLL_SUBVER}.patch"

  cp -Tf ../config .config

  if [ "${_kernelname}" != "" ]; then
    sed -i "s|CONFIG_LOCALVERSION=.*|CONFIG_LOCALVERSION=\"${_kernelname}\"|g" ./.config
    sed -i "s|CONFIG_LOCALVERSION_AUTO=.*|CONFIG_LOCALVERSION_AUTO=n|" ./.config
  fi

  # set extraversion to pkgrel
  sed -ri "s|^(EXTRAVERSION =).*|\1 -${pkgrel}|" Makefile

  # Optionally disable NUMA for 64-bit kernels only
  if [ -n "$_NUMA_disable" ] && [ "${CARCH}" = "x86_64" ]; then
      msg "Disabling NUMA from kernel config..."
      sed -i -e 's/CONFIG_NUMA=y/# CONFIG_NUMA is not set/' \
        -i -e '/CONFIG_AMD_NUMA=y/d' \
        -i -e '/CONFIG_X86_64_ACPI_NUMA=y/d' \
        -i -e '/CONFIG_NODES_SPAN_OTHER_NODES=y/d' \
        -i -e '/# CONFIG_NUMA_EMU is not set/d' \
        -i -e '/CONFIG_NODES_SHIFT=6/d' \
        -i -e '/CONFIG_NEED_MULTIPLE_NODES=y/d' \
        -i -e '/# CONFIG_MOVABLE_NODE is not set/d' \
        -i -e '/CONFIG_USE_PERCPU_NUMA_NODE_ID=y/d' \
        -i -e '/CONFIG_ACPI_NUMA=y/d' ./.config
  fi

  # Optionally enable BFQ as the default I/O scheduler
  if [ -n "$_BFQ_enable" ]; then
    msg "Setting BFQ as default I/O scheduler..."
    sed -i -e 's|CONFIG_DEFAULT_IOSCHED=.*|CONFIG_DEFAULT_IOSCHED="bfq"|' \
        -i -e 's|CONFIG_DEFAULT_DEADLINE=y|# CONFIG_DEFAULT_DEADLINE is not set\nCONFIG_DEFAULT_BFQ=y|' \
        -i -e 's|CONFIG_DEFAULT_CFQ=y|# CONFIG_DEFAULT_CFQ is not set\nCONFIG_DEFAULT_BFQ=y|' ./.config
  fi

  # don't run depmod on 'make install'. We'll do this ourselves in packaging
  sed -i '2iexit 0' scripts/depmod.sh

  # get kernel version
  make prepare

  # load configuration
  # Configure the kernel. Replace the line below with one of your choice.
  #make menuconfig # CLI menu for configuration
  #make nconfig # new CLI menu for configuration
  #make xconfig # X-based configuration
  #make oldconfig # using old config from previous kernel version
  # ... or manually edit .config

  # rewrite configuration
  yes "" | make config >/dev/null
}

build() {
  cd ${_srcname}

  make ${MAKEFLAGS} LOCALVERSION= bzImage modules
}

_package() {
  pkgdesc="The ${pkgbase/linux/Linux} kernel and modules with the ${_PATHSET_DESC} patchsets"
  [ "${pkgbase}" = "linux" ] && groups=('base')
  depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=0.7')
  optdepends=('crda: to set the correct wireless channels of your country')
  backup=("etc/mkinitcpio.d/${pkgbase}.preset")
  install=linux.install

  cd ${_srcname}

  # get kernel version
  _kernver="$(make LOCALVERSION= kernelrelease)"
  _basekernel=${_kernver%%-*}
  _basekernel=${_basekernel%.*}

  mkdir -p "${pkgdir}"/{boot,usr/lib/modules}
  make LOCALVERSION= INSTALL_MOD_PATH="${pkgdir}/usr" modules_install
  cp arch/x86/boot/bzImage "${pkgdir}/boot/vmlinuz-${pkgbase}"

  # make room for external modules
  local _extramodules="extramodules-${_basekernel}${_kernelname:--ARCH}"
  ln -s "../${_extramodules}" "${pkgdir}/usr/lib/modules/${_kernver}/extramodules"

  # add real version for building modules and running depmod from hook
  echo "${_kernver}" |
    install -Dm644 /dev/stdin "${pkgdir}/usr/lib/modules/${_extramodules}/version"

  # remove build and source links
  rm "${pkgdir}"/usr/lib/modules/${_kernver}/{source,build}

  # remove the firmware
  rm -rf "${pkgdir}/usr/lib/firmware"

  # now we call depmod...
  depmod -b "${pkgdir}/usr" -F System.map "${_kernver}"

  # sed expression for following substitutions
  local _subst="
    s|%PKGBASE%|${pkgbase}|g
    s|%KERNVER%|${_kernver}|g
    s|%EXTRAMODULES%|${_extramodules}|g
  "

  # hack to allow specifying an initially nonexisting install file
  sed "${_subst}" "${startdir}/${install}" > "${startdir}/${install}.pkg"
  true && install=${install}.pkg

  # install mkinitcpio preset file
  sed "${_subst}" ../linux.preset |
    install -Dm644 /dev/stdin "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"

  # install pacman hooks
  sed "${_subst}" ../60-linux.hook |
    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/60-${pkgbase}.hook"
  sed "${_subst}" ../90-linux.hook |
    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/90-${pkgbase}.hook"
}

_package-headers() {
  pkgdesc="Header files and scripts for building modules for ${pkgbase/linux/Linux} kernel"

  cd ${_srcname}
  local _builddir="${pkgdir}/usr/lib/modules/${_kernver}/build"

  msg2 "Installing build files..."
  install -Dt "${_builddir}" -m644 Makefile .config Module.symvers System.map vmlinux
  install -Dt "${_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}

  # ???
  mkdir "${_builddir}/.tmp_versions"

  msg2 "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/9912
  install -Dt "${_builddir}/drivers/media/dvb-core" -m644 drivers/media/dvb-core/*.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

  msg2 "Installing KConfig files..."
  find . -name 'Kconfig*' -exec install -Dm644 {} "${_builddir}/{}" \;

  msg2 "Removing unneeded architectures..."
  local _arch
  for _arch in "${_builddir}"/arch/*/; do
    [[ ${_arch} == */x86/ ]] && continue
    rm -r "${_arch}"
  done

  msg2 "Removing files already in linux-docs package..."
  rm -r "${_builddir}/Documentation"

  msg2 "Removing broken symlinks..."
  find -L "${_builddir}" -type l -printf 'Removing %P\n' -delete

  msg2 "Removing loose objects..."
  find "${_builddir}" -type f -name '*.o' -printf 'Removing %P\n' -delete

  msg2 "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)

  msg2 "Adding symlink..."
  mkdir -p "$pkgdir/usr/src"
  ln -sr "${_builddir}" "$pkgdir/usr/src/$pkgbase-$pkgver"

  msg2 "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

_package-docs() {
  pkgdesc="Kernel hackers manual - HTML documentation that comes with the ${pkgbase/linux/Linux} kernel"

  cd ${_srcname}
  local _builddir="${pkgdir}/usr/lib/modules/${_kernver}/build"

  mkdir -p "${_builddir}"
  cp -t "${_builddir}" -a Documentation

  # Fix permissions
  chmod -R u=rwX,go=rX "${_builddir}"
}

for _p in ${pkgname[@]}; do
  eval "package_${_p}() {
    $(declare -f "_package${_p#${pkgbase}}")
    _package${_p#${pkgbase}}
  }"
done