Hi Mark, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next head: 8c33df1afd86c611da8473dc6fc5f3af3dabe984 commit: bd7d95cafb499e24903b7d21f9eeb2c5208160c2 [2/28] arm64: KVM: Consistently advance singlestep when emulating instructions config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout bd7d95cafb499e24903b7d21f9eeb2c5208160c2 # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=ia64 Note: the kvmarm/next HEAD 8c33df1afd86c611da8473dc6fc5f3af3dabe984 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): ERROR: "ia64_delay_loop" [drivers/spi/spi-thunderx.ko] undefined! >> ERROR: "numa_slit" [drivers/nvme/host/nvme-core.ko] undefined! >> ERROR: "__sw_hweight8" [drivers/net/wireless/mediatek/mt76/mt76.ko] undefined! >> ERROR: "ia64_delay_loop" [drivers/net/phy/mdio-cavium.ko] undefined! -- ERROR: "ia64_delay_loop" [drivers/spi/spi-thunderx.ko] undefined! >> ERROR: "__sw_hweight8" [drivers/net/wireless/mediatek/mt76/mt76.ko] undefined! >> ERROR: "ia64_delay_loop" [drivers/net/phy/mdio-cavium.ko] undefined! --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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