tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a5dc8300df75e8b8384b4c82225f1e4a0b4d9b55 commit: 7495e22bb165e7030bae4d9c6e84addb5ea17b29 KVM: Move running VCPU from ARM to common code date: 5 months ago config: s390-randconfig-s032-20200615 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-rc1-3-g55607964-dirty git checkout 7495e22bb165e7030bae4d9c6e84addb5ea17b29 # save the attached .config to linux build tree make W=1 C=1 ARCH=s390 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) arch/s390/kvm/../../../virt/kvm/kvm_main.c:4326:17: sparse: sparse: symbol 'kvm_get_running_vcpus' redeclared with different type (different address spaces): include/linux/kvm_host.h:1339:26: sparse: note: previously declared as: include/linux/kvm_host.h:1339:26: sparse: struct kvm_vcpu [noderef] <asn:3> **extern [addressable] [toplevel] kvm_get_running_vcpus( ... ) vim +4326 arch/s390/kvm/../../../virt/kvm/kvm_main.c 4322 4323 /** 4324 * kvm_get_running_vcpus - get the per-CPU array of currently running vcpus. 4325 */ 4327 { 4328 return &kvm_running_vcpu; 4329 } 4330 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org