Hi Pierre, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on kvm/master] [also build test WARNING on v5.18-rc3] [cannot apply to kvms390/next mst-vhost/linux-next next-20220420] [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/intel-lab-lkp/linux/commits/Pierre-Morel/s390x-KVM-CPU-Topology/20220420-194302 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git master config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20220421/202204210249.JUYt00GG-lkp@xxxxxxxxx/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/intel-lab-lkp/linux/commit/0bdeef651636ac2ef4918fb6e3230614e2fb3581 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Pierre-Morel/s390x-KVM-CPU-Topology/20220420-194302 git checkout 0bdeef651636ac2ef4918fb6e3230614e2fb3581 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash arch/s390/kvm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): arch/s390/kvm/kvm-s390.c: In function 'kvm_s390_sca_clear_mtcr': >> arch/s390/kvm/kvm-s390.c:1773:13: warning: variable 'val' set but not used [-Wunused-but-set-variable] 1773 | int val; | ^~~ vim +/val +1773 arch/s390/kvm/kvm-s390.c 1758 1759 /** 1760 * kvm_s390_sca_clear_mtcr 1761 * @kvm: guest KVM description 1762 * 1763 * Is only relevant if the topology facility is present, 1764 * the caller should check KVM facility 11 1765 * 1766 * Updates the Multiprocessor Topology-Change-Report to signal 1767 * the guest with a topology change. 1768 */ 1769 static int kvm_s390_sca_clear_mtcr(struct kvm *kvm) 1770 { 1771 struct bsca_block *sca = kvm->arch.sca; 1772 struct kvm_vcpu *vcpu; > 1773 int val; 1774 1775 vcpu = kvm_s390_get_first_vcpu(kvm); 1776 if (!vcpu) 1777 return -ENODEV; 1778 1779 ipte_lock(vcpu); 1780 val = READ_ONCE(sca->utility); 1781 WRITE_ONCE(sca->utility, sca->utility & ~SCA_UTILITY_MTCR); 1782 ipte_unlock(vcpu); 1783 1784 return 0; 1785 } 1786 -- 0-DAY CI Kernel Test Service https://01.org/lkp
