Hi Like, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/linux-next] [cannot apply to v5.4-rc1 next-20190930] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Like-Xu/perf-core-Provide-a-kernel-internal-interface-to-recalibrate-event-period/20191001-081543 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: sh-rsk7269_defconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=sh If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): kernel/events/core.o: In function `_perf_ioctl': >> core.c:(.text+0x7068): undefined reference to `__get_user_unknown' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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