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# Maintainer: Tom Nguyen <tom81094@gmail.com>
# Contributor: Tobias Powalowski <tpowa@archlinux.org>
# Contributor: Thomas Baechler <thomas@archlinux.org>

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

# Use tentative patches from https://groups.google.com/forum/#!forum/bfq-iosched
_use_tentative_patches=

### Use mailing-list patches; many thanks to Piotr "sir_lucjan" Gorski
# ML1 - [PATCH V4 00/14] blk-mq-sched: improve SCSI-MQ performance: https://marc.info/?l=linux-block&m=150436546704854&w=2
_use_ml1_patches=

# ML2 - [PATCH] block,bfq: Disable writeback throttling: https://marc.info/?l=linux-block&m=150486424501778&w=2
_use_ml2_patches=

# Running with a 1000 HZ tick rate
_1k_HZ_ticks=

### Enable fancontrol for DELL
_dell_fancontrol=

### Set performance governor as default
_per_gov=

# NUMA is optimized for multi-socket motherboards. A single multi-core CPU can
# actually run slower with NUMA enabled. Most users will want to set this option
# to enabled ... in other words, do not use NUMA on a single CPU system.
#
# See, https://bugs.archlinux.org/task/31187
_NUMAdisable=y

# Compile ONLY probed modules
# As of mainline 2.6.32, running with this option will only build the modules
# that you currently have probed in your system VASTLY reducing the number of
# modules built and the build time to do it.
#
# WARNING - ALL modules must be probed BEFORE you begin making the pkg!
#
# 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 will call it directly to probe all the modules you have logged!
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
_localmodcfg=

# Use the current kernel's .config file
# Enabling this option will use the .config of the RUNNING kernel rather than
# the ARCH defaults. Useful when the package gets updated and you already went
# through the trouble of customizing your config options.  NOT recommended when
# a new kernel is released, but again, convenient for package bumps.
_use_current=

### Disable Deadline I/O scheduler
_deadline_disable=

### Disable CFQ I/O scheduler
_CFQ_disable=

### Disable Kyber I/O scheduler
_kyber_disable=

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

pkgbase=linux-bfq-mq
#pkgbase=linux-custom       # Build kernel with a different name
pkgver=4.14.1
_srcpatch="${pkgver##*\.*\.}"
_srcname="linux-${pkgver%%\.${_srcpatch}}"
pkgrel=1
arch=('x86_64')
url="https://github.com/Algodev-github/bfq-mq/"
license=('GPL2')
makedepends=('xmlto' 'kmod' 'inetutils' 'bc' 'libelf')
options=('!strip')
_bfqpath="https://gitlab.com/tom81094/custom-patches/raw/master/bfq-mq"
_mergepath="${_bfqpath}/merges/${pkgver}"
#_mlpath_1="${_bfqpath}/mailing-list/blk-mq-sched-improve-SCSI-MQ-performance-V4"
_mlpath_2="${_bfqpath}/mailing-list/block-bfq-disable-wbt"
_lucjanpath="https://gitlab.com/sirlucjan/kernel-patches/raw/master/4.14"
#_lucjanpath="https://raw.githubusercontent.com/sirlucjan/kernel-patches/master/4.14"
_bfqgroup="https://groups.google.com/group/bfq-iosched/attach"
_gcc_patch='enable_additional_cpu_optimizations_for_gcc_v4.9+_kernel_v4.13+.patch'
_bfq_mq_ver='20171114'
_bfq_mq_patch="4.14-bfq-sq-mq-git-${_bfq_mq_ver}.patch"
source=(# mainline kernel patches
        "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"
        # gcc cpu optimizatons from graysky and ck; forked by sir_lucjan
        "https://raw.githubusercontent.com/sirlucjan/kernel_gcc_patch/master/${_gcc_patch}"
        # bfq-mq patch
        #"${_bfqpath}/${_bfq_mq_patch}"
        "${_lucjanpath}/${_bfq_mq_patch}"
        # tentative patches
        "${_bfqpath}/tentative/T0001-Check-presence-on-tree-of-every-entity-after-every-a.patch"
        # mailing-list (ML1) patches
        #"${_mlpath_1}/ML1-0001-blk-mq-sched-fix-scheduler-bad-performance.patch"
        #"${_mlpath_1}/ML1-0002-sbitmap-introduce-__sbitmap_for_each_set.patch"
        #"${_mlpath_1}/ML1-0003-blk-mq-introduce-blk_mq_dispatch_rq_from_ctx.patch"
        #"${_mlpath_1}/ML1-0004-blk-mq-sched-move-actual-dispatching-into-one-helper.patch"
        #"${_mlpath_1}/ML1-0005-blk-mq-sched-improve-dispatching-from-sw-queue.patch"
        #"${_mlpath_1}/ML1-0006-blk-mq-sched-don-t-dequeue-request-until-all-in-disp.patch"
        #"${_mlpath_1}/ML1-0007-blk-mq-sched-introduce-blk_mq_sched_queue_depth.patch"
        #"${_mlpath_1}/ML1-0008-blk-mq-sched-use-q-queue_depth-as-hint-for-q-nr_requ.patch"
        #"${_mlpath_1}/ML1-0009-block-introduce-rqhash-helpers.patch"
        #"${_mlpath_1}/ML1-0010-block-move-actual-bio-merge-code-into-__elv_merge.patch"
        #"${_mlpath_1}/ML1-0011-block-add-check-on-elevator-for-supporting-bio-merge.patch"
        #"${_mlpath_1}/ML1-0012-block-introduce-.last_merge-and-.hash-to-blk_mq_ctx.patch"
        #"${_mlpath_1}/ML1-0013-blk-mq-sched-refactor-blk_mq_sched_try_merge.patch"
        #"${_mlpath_1}/ML1-0014-blk-mq-improve-bio-merge-from-blk-mq-sw-queue.patch"
        "${_lucjanpath}/blk-mq-v10/0050-blk-mq-sched-dispatch-from-scheduler-only-after-progress-is-made-on->dispatch.patch"
        "${_lucjanpath}/blk-mq-v10/0051-blk-mq-sched-move-actual-dispatching-into-one-helper.patch"
        "${_lucjanpath}/blk-mq-v10/0052-blk-mq-sbitmap-introduce__sbitmap_for_each_set().patch"
        "${_lucjanpath}/blk-mq-v10/0053-blk-mq-block-kyber-check-if-there-is-request-in-ctx-in-kyber_has_work().patch"
        "${_lucjanpath}/blk-mq-v10/0054-blk-mq-introduce-get_budget-and-put_budget-in-blk_mq_ops.patch"
        "${_lucjanpath}/blk-mq-v10/0055-blk-mq-sched-improve-dispatching-from-sw-queue.patch"
        "${_lucjanpath}/blk-mq-v10/0056-blk-mq-SCSI-allow-to-pass-null-rq-to-scsi_prep_state_check().patch"
        "${_lucjanpath}/blk-mq-v10/0057-blk-mq-SCSI-implement-get-budget-and-put_budget-for-blk-mq.patch"
        # mailing-list (ML2) patches
        "${_mlpath_2}/ML2-0001-block-bfq-Disable-writeback-throttling.patch"
         # the main kernel config files
        'config'
         # pacman hook for depmod
        '60-linux.hook'
         # pacman hook for initramfs regeneration
        '90-linux.hook'
         # pacman hook for remove initramfs
        '99-linux.hook'
         # standard config files for mkinitcpio ramdisk
        'linux.preset'
        '0001-platform-x86-hp-wmi-Fix-tablet-mode-detection-for-co.patch'
        '0001-bio-ensure-__bio_clone_fast-copies-bi_partno.patch')

sha256sums=('f81d59477e90a130857ce18dc02f4fbe5725854911db1e7ba770c7cd350f96a7'
            'SKIP'
            '5af72b487fbcc8e7fd3f5392271490c8498ffb2048e77abaf406971a7382f8d7'
            'SKIP'
            '8b00041911e67654b0bd9602125853a1a94f6155c5cac4f886507554c8324ee8'
            '0cfc2877c3772c946855c4dedb442843a7ec71d6cf47dfee69c40fd329405824'
            'eb3cb1a9e487c54346b798b57f5b505f8a85fd1bc839d8f00b2925e6a7d74531'
            '388b210b15913d6e46d85d3c997d21f796957d2e3eb082ba8ffda1371eaa1f3b'
            'ed4dec610bb99928c761dee5891b9f79770f0265678c232b0d4c1879beb73e94'
            '40c2bbd7abd390e0674a797d08f7624051750d38a09d4c42ddba1f8341bb362a'
            'f41ffe7388b9728061fe76c303afeb074237c4016b9e802f11e99e14d42f3a97'
            '2ddcc73b67f3c9ba441298650a86738efbc50fb0f79be6bc5a78e5de5cda9a0b'
            'cfe7d6be0c243bcf6e30f1145991424ad3fa90d43bda214e0df613de007699b6'
            '19dd49fd6c50ac74074b354898d6aaf0c1da30e85c4f5770fdb54195b49277b0'
            '7c51d0053053a3a0f6ed8759a5464ed5a3275a9dd832513a5678c3bcead9e5d5'
            '5e57c8d1d87a63e1c5947aba02346862992f39be2b2761ea142b3897995495aa'
            'a81c8a378a4092b040a928940b4ca625b775e4a57d5b18d583de052f3c8aa076'
            'ae2e95db94ef7176207c690224169594d49445e04249d2499e9d2fbc117a0b21'
            '75f99f5239e03238f88d1a834c50043ec32b1dc568f2cc291b07d04718483919'
            '907a422cf56189ad9453e9416b13fe8ccd5c1d38dec3bd1b7d60d53f1afe12fa'
            'ad6344badc91ad0630caacde83f7f9b97276f80d26a20619a87952be65492c65'
            '6f1d9b6a119bfab150a0bc1f550609dd9290328df709b67c984f0a6b0abe8afd'
            '92b8755030d405fa4a9cd31cbe2998fd71584164431e5edc28c2be04fab24d1e')
validpgpkeys=(
              'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
              '647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman
             )

_kernelname=${pkgbase#linux}

prepare() {
  cd ${_srcname}

  ### Add upstream patch
      msg "Add upstream patch"
      patch -p1 -i ../patch-${pkgver}

  ### Fix https://bugs.archlinux.org/task/56207
        msg "Fix bug #56207"
        patch -Np1 -i ../0001-platform-x86-hp-wmi-Fix-tablet-mode-detection-for-co.patch    
            
    ### Fix https://bugs.archlinux.org/task/56404
        msg "Fix bug #56404"
        patch -Np1 -i ../0001-bio-ensure-__bio_clone_fast-copies-bi_partno.patch

  
  ### Patch source with BFQ-SQ-MQ
        msg "Fix naming schema in BFQ-SQ-MQ patch"
        sed -i -e "s|SUBLEVEL = 0|SUBLEVEL = 1|g" \
            -i -e "s|EXTRAVERSION = -bfq|EXTRAVERSION =|g" \
            -i -e "s|EXTRAVERSION =-mq|EXTRAVERSION =|g" \
            -i -e "s|NAME = Fearless Coyote|NAME = Petit Gorille|g" ../${_bfq_mq_patch}
        msg "Patching source with BFQ-SQ-MQ patches"
        patch -Np1 -i ../${_bfq_mq_patch}

  ### Patches related to BUG_ON(entity->tree && entity->tree != &st->active) in __bfq_requeue_entity();
  if [ -n "$_use_tentative_patches" ]; then
    msg "Apply tentative patches"
    for p in ../T000*.patch; do patch -Np1 -i "$p"; done
  fi

  ### Patches from mailing-list
  # ML1 - [PATCH V4 00/14] blk-mq-sched: improve SCSI-MQ performance: https://marc.info/?l=linux-block&m=150436546704854&w=2
  if [ -n "$_use_ml1_patches" ]; then
    msg "Apply mailing-list patches 1"
    #for p in ../ML1*.patch; do
    for p in ../*-blk-mq*.patch*; do
    msg " $p"
    patch -Np1 -i "$p"; done
  fi

  # ML2 - [PATCH] block,bfq: Disable writeback throttling: https://marc.info/?l=linux-block&m=150486424501778&w=2
  if [ -n "$_use_ml2_patches" ]; then
    msg "Apply mailing-list patches 2"
    for p in ../ML2*.patch; do
      msg " $p"
    patch -Np1 -i "$p"; done
  fi

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

  ### Patch source to enable more gcc CPU optimizatons via the make nconfig
  msg "Patch source with gcc patch to enable more cpus types"
  patch -Np1 -i ../${_gcc_patch}

  # Clean tree and copy ARCH config over
  make mrproper

  cp -Tf ../config .config

  ### Optionally set tickrate to 1000
  if [ -n "$_1k_HZ_ticks" ]; then
    msg "Setting tick rate to 1k..."
    sed -i -e 's/^CONFIG_HZ_300=y/# CONFIG_HZ_300 is not set/' \
        -i -e 's/^# CONFIG_HZ_1000 is not set/CONFIG_HZ_1000=y/' \
        -i -e 's/^CONFIG_HZ=300/CONFIG_HZ=1000/' .config
  fi

  ### Enable fancontrol
  if [ -n "$_dell_fancontrol" ]; then
    msg "Enabling I8K for Dell..."
    sed -i -e s'/CONFIG_I8K=m/CONFIG_I8K=y/' ./.config
    sed -i -e s'/CONFIG_SENSORS_DELL_SMM=m/CONFIG_SENSORS_DELL_SMM=y/' ./.config
  fi

  ### Set performance governor
  if [ -n "$_per_gov" ]; then
    msg "Setting performance governor.."
    sed -i -e s'/CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y/# CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set/' ./.config
    sed -i -e s'/# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set/CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y/' ./.config
    msg "Disabling uneeded governors..."
    sed -i -e s'/CONFIG_CPU_FREQ_GOV_ONDEMAND=m/# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set/' ./.config
    sed -i -e s'/CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m/# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set/' ./.config
    sed -i -e s'/CONFIG_CPU_FREQ_GOV_USERSPACE=m/# CONFIG_CPU_FREQ_GOV_USERSPACE is not set/' ./.config
    sed -i -e s'/CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y/# CONFIG_CPU_FREQ_GOV_SCHEDUTIL is not set/' ./.config
  fi

  ### Optionally disable NUMA for 64-bit kernels only
        # (x86 kernels do not support NUMA)
        if [ -n "$_NUMAdisable" ]; 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 use running kernel's config
  # code originally by nous; http://aur.archlinux.org/packages.php?ID=40191
  if [ -n "$_use_current" ]; then
    if [[ -s /proc/config.gz ]]; then
      msg "Extracting config from /proc/config.gz..."
      # modprobe configs
      zcat /proc/config.gz > ./.config
    else
      warning "Your kernel was not compiled with IKCONFIG_PROC!"
      warning "You cannot read the current config!"
      warning "Aborting!"
      exit
    fi
  fi

  ### Disable Deadline I/O scheduler
  if [ -n "$_deadline_disable" ]; then
    msg "Disabling Deadline I/O scheduler..."
    sed -i -e s'/CONFIG_IOSCHED_DEADLINE=y/# CONFIG_IOSCHED_DEADLINE is not set/' ./.config
    sed -i -e s'/CONFIG_MQ_IOSCHED_DEADLINE=y/# CONFIG_MQ_IOSCHED_DEADLINE is not set/' ./.config
  fi

  ### Disable CFQ I/O scheduler
  if [ -n "$_CFQ_disable" ]; then
    msg "Disabling CFQ I/O scheduler..."
    sed -i -e s'/CONFIG_IOSCHED_CFQ=y/# CONFIG_IOSCHED_CFQ is not set/' ./.config
    sed -i -e s'/CONFIG_CFQ_GROUP_IOSCHED=y/# CONFIG_CFQ_GROUP_IOSCHED is not set/' ./.config
  fi

  ### Disable Kyber I/O scheduler
  if [ -n "$_kyber_disable" ]; then
    msg "Disabling Kyber I/O scheduler..."
    sed -i -e s'/CONFIG_MQ_IOSCHED_KYBER=y/# CONFIG_MQ_IOSCHED_KYBER is not set/' ./.config
  fi

  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

  # 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

  ### Optionally load needed modules for the make localmodconfig
  # See https://aur.archlinux.org/packages/modprobed-db
  if [ -n "$_localmodcfg" ]; then
    msg "If you have modprobed-db installed, running it in recall mode now"
    if [ -e /usr/bin/modprobed-db ]; then
      [[ -x /usr/bin/sudo ]] || {
      echo "Cannot call modprobe with sudo. Install sudo and configure it to work with this user."
      exit 1; }
      sudo /usr/bin/modprobed-db recall
    fi
    msg "Running Steven Rostedt's make localmodconfig now"
    make localmodconfig
  fi

  # 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

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

build() {
  cd ${_srcname}

  make ${MAKEFLAGS} LOCALVERSION= bzImage modules
}

_package() {
  pkgdesc="The ${pkgbase/linux/Linux} kernel and modules with the BFQ-MQ scheduler"
  depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=0.7')
  optdepends=('crda: to set the correct wireless channels of your country' 'modprobed-db: Keeps track of EVERY kernel module that has ever been probed - useful for those of us who make localmodconfig')
  provides=("${pkgbase}=${pkgver}" "linux=${pkgver}")
  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}

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

    # add vmlinux
    install -Dt "${pkgdir}/usr/lib/modules/${_kernver}/build" -m644 vmlinux

    # 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"
    sed "${_subst}" ../99-linux.hook |
        install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/99-${pkgbase}.hook"     
}

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

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

    install -Dt "${_builddir}" -m644 Makefile .config Module.symvers
    install -Dt "${_builddir}/kernel" -m644 kernel/Makefile

    mkdir "${_builddir}/.tmp_versions"

    cp -t "${_builddir}" -a include scripts

    install -Dt "${_builddir}/arch/x86" -m644 arch/x86/Makefile
    install -Dt "${_builddir}/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s

    cp -t "${_builddir}/arch/x86" -a arch/x86/include

    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

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

    # copy in Kconfig files
    find . -name Kconfig\* -exec install -Dm644 {} "${_builddir}/{}" \;

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

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

    # remove files already in linux-bfq-mq-docs package
    rm -r "${_builddir}/Documentation"

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

    # strip scripts directory
    local _binary _strip
    while read -rd '' _binary; do
        case "$(file -bi "${_binary}")" in
        *application/x-sharedlib*)  _strip="${STRIP_SHARED}"   ;; # Libraries (.so)
        *application/x-archive*)    _strip="${STRIP_STATIC}"   ;; # Libraries (.a)
        *application/x-executable*) _strip="${STRIP_BINARIES}" ;; # Binaries
        *) continue ;;
        esac
        /usr/bin/strip ${_strip} "${_binary}"
    done < <(find "${_builddir}/scripts" -type f -perm -u+w -print0 2>/dev/null)
}

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

  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}"
}

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: