FYI, we noticed the following commit: commit: a40f61777b8c66cfd61c37b0102387578abb8ed0 ("tools headers: Sync kernel ABI headers with tooling headers") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: perf-sanity-tests with following parameters: on test machine: qemu-system-x86_64 -enable-kvm -cpu kvm64,+ssse3 -smp 2 -m 8G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): [ 23.621056] 2017-08-31 02:09:25 make LLVM_CONFIG=/usr/bin/llvm-config-3.9 LIBCLANGLLVM=1 ARCH= -C /usr/src/linux-perf-x86_64-rhel-7.2-a40f61777b8c66cfd61c37b0102387578abb8ed0/tools/perf [ 23.621061] [ 23.636319] make: Entering directory '/usr/src/linux-perf-x86_64-rhel-7.2-a40f61777b8c66cfd61c37b0102387578abb8ed0/tools/perf' [ 23.636321] [ 23.649340] [ 23.659490] HOSTCC fixdep.o [ 23.659492] [ 23.681986] HOSTLD fixdep-in.o [ 23.681989] [ 23.684995] LINK fixdep [ 23.684997] [ 24.051653] Warning: Kernel ABI header at 'tools/arch/x86/include/asm/disabled-features.h' differs from latest version at 'arch/x86/include/asm/disabled-features.h' To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Xiaolong