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Linux Memory Management List mm@kvack.org>; Wei Liu ; Dexuan Cui > ; Michael Kelley (LINUX) > Subject: [linux-next:master 11576/12208] > arch/x86/kernel/cpu/mshyperv.c:407: undefined reference to > `isolation_type_en_snp' The failure happens because we have CONFIG_HYPERVISOR_GUEST=3Dy, but CONFIG_HYPERV is not set. This has been fixed in the hyperv-next branch: https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/log/?h=3Dh= yperv-next https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?h= =3Dhyperv-next&id=3D86e619c922e616d8780833562a14a5bda329f0c3 The fix is not in linux-next's master branch (currently it's next-20230823)= yet. I believe tomorrow's linux-next would build successfully. Thanks, Dexuan