tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: fb57b1fabcb28f358901b2df90abd2b48abc1ca8 commit: 9ed24f4b712b855dcf7be3025b75b051cb73a2b7 [9554/10701] KVM: arm64: Move virt/kvm/arm to arch/arm64 config: arm64-randconfig-r031-20200519 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9ed24f4b712b855dcf7be3025b75b051cb73a2b7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): arch/arm64/kvm/mmu.c: In function 'unmap_hyp_pmds': 497 | pmd_t *pmd, *start_pmd; | ^~~~~~~~~ arch/arm64/kvm/mmu.c: In function 'unmap_hyp_puds': arch/arm64/kvm/mmu.c:514:15: warning: variable 'start_pud' set but not used [-Wunused-but-set-variable] 514 | pud_t *pud, *start_pud; | ^~~~~~~~~ vim +/start_pmd +497 arch/arm64/kvm/mmu.c 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 493 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 494 static void unmap_hyp_pmds(pud_t *pud, phys_addr_t addr, phys_addr_t end) 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 495 { 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 496 phys_addr_t next; 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 @497 pmd_t *pmd, *start_pmd; 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 498 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 499 start_pmd = pmd = pmd_offset(pud, addr); 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 500 do { 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 501 next = pmd_addr_end(addr, end); 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 502 /* Hyp doesn't use huge pmds */ 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 503 if (!pmd_none(*pmd)) 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 504 unmap_hyp_ptes(pmd, addr, next); 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 505 } while (pmd++, addr = next, addr != end); 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 506 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 507 if (hyp_pmd_table_empty(start_pmd)) 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 508 clear_hyp_pud_entry(pud); 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 509 } 64f324979210d4 arch/arm/kvm/mmu.c Suzuki K Poulose 2016-03-22 510 :::::: The code at line 497 was first introduced by commit :::::: 64f324979210d4064adf64f19da40c125c9dd137 kvm-arm: Add explicit hyp page table modifiers :::::: TO: Suzuki K Poulose <suzuki.poulose(a)arm.com&gt; :::::: CC: Christoffer Dall <christoffer.dall(a)linaro.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org