Hi Shivam, Thank you for the patch! Yet something to improve: [auto build test ERROR on mst-vhost/linux-next] [also build test ERROR on linus/master v5.15-rc7 next-20211026] [cannot apply to kvm/queue] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Shivam-Kumar/KVM-Dirty-Quota-Based-VM-Live-Migration-Auto-Converge/20211027-003852 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next config: s390-alldefconfig (attached as .config) compiler: s390-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/96d8525a5ba81c559c00d6c0fa1f2b2e84fe74ce git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Shivam-Kumar/KVM-Dirty-Quota-Based-VM-Live-Migration-Auto-Converge/20211027-003852 git checkout 96d8525a5ba81c559c00d6c0fa1f2b2e84fe74ce # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): s390-linux-ld: arch/s390/../../virt/kvm/kvm_main.o: in function `kvm_vm_ioctl_create_vcpu': >> kvm_main.c:(.text+0x3766): undefined reference to `kvm_vcpu_dirty_quota_alloc' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org