reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/intel/linux-intel-lts/commit/8122e08b1d876b9af605db5ad351961c5ea276ed
        git remote add intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-lts pr/69
        git checkout 8122e08b1d876b9af605db5ad351961c5ea276ed
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/net/ethernet/mellanox/mlxsw/ net/packet/af_packet_diag.ko net/psample/psample.ko net/qrtr/qrtr-smd.ko net/qrtr/qrtr.ko net/sched/cls_basic.ko net/sched/cls_matchall.ko net/sched/em_canid.ko net/sched/em_cmp.ko net/sched/sch_cbs.ko net/sched/sch_codel.ko net/sched/sch_htb.ko net/sched/sch_mqprio.ko net/sched/sch_multiq.ko net/sched/sch_qfq.ko net/sched/sch_sfb.ko security/keys/encrypted-keys/encrypted-keys.ko security/keys/trusted.ko sound/core/snd-hrtimer.ko sound/firewire/fireface/snd-fireface.ko sound/firewire/fireworks/snd-fireworks.ko sound/firewire/tascam/snd-firewire-tascam.ko sound/usb/6fire/snd-usb-6fire.ko sound/usb/hiface/snd-usb-hiface.ko sound/usb/line6/snd-usb-line6.ko sound/usb/line6/snd-usb-toneport.ko sound/usb/line6/snd-usb-variax.ko sound/usb/snd-usbmidi-lib.ko sound/usb/usx2y/snd-usb-usx2y.ko