tree: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next-test head: f76c7820fc6ef641b75b5142aea72f1485c73bb1 commit: e4e8bc1df691ba5ba749d1e2b67acf9827e51a35 [245/263] powerpc/kvm: Fix PR KVM with KUAP/MEM_KEYS enabled config: powerpc64-randconfig-p001-20210421 (attached as .config) compiler: powerpc64le-linux-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/... git remote add powerpc https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git git fetch --no-tags powerpc next-test git checkout e4e8bc1df691ba5ba749d1e2b67acf9827e51a35 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/powerpc/include/asm/book3s/64/pkeys.h:6, from arch/powerpc/kvm/book3s_64_mmu_host.c:15: arch/powerpc/include/asm/book3s/64/hash-pkey.h: In function 'hash__vmflag_to_pte_pkey_bits': 10 | return (((vm_flags & VM_PKEY_BIT0) ? H_PTE_PKEY_BIT0 : 0x0UL) | | ^~~~~~~~~~~~ | H_PTE_PKEY_BIT0 arch/powerpc/include/asm/book3s/64/hash-pkey.h:10:23: note: each undeclared identifier is reported only once for each function it appears in 11 | ((vm_flags & VM_PKEY_BIT1) ? H_PTE_PKEY_BIT1 : 0x0UL) | | ^~~~~~~~~~~~ | H_PTE_PKEY_BIT1 12 | ((vm_flags & VM_PKEY_BIT2) ? H_PTE_PKEY_BIT2 : 0x0UL) | | ^~~~~~~~~~~~ 13 | ((vm_flags & VM_PKEY_BIT3) ? H_PTE_PKEY_BIT3 : 0x0UL) | | ^~~~~~~~~~~~ | H_PTE_PKEY_BIT3 14 | ((vm_flags & VM_PKEY_BIT4) ? H_PTE_PKEY_BIT4 : 0x0UL)); | ^~~~~~~~~~~~ | H_PTE_PKEY_BIT4 In file included from arch/powerpc/kvm/book3s_64_mmu_host.c:17: arch/powerpc/include/asm/mmu_context.h: At top level: 287 | static inline u64 pte_to_hpte_pkey_bits(u64 pteflags, unsigned long flags) | ^~~~~~~~~~~~~~~~~~~~~ In file included from arch/powerpc/include/asm/book3s/64/pkeys.h:6, from arch/powerpc/kvm/book3s_64_mmu_host.c:15: arch/powerpc/include/asm/book3s/64/hash-pkey.h:17:19: note: previous definition of 'pte_to_hpte_pkey_bits' was here 17 | static inline u64 pte_to_hpte_pkey_bits(u64 pteflags, unsigned long flags) | ^~~~~~~~~~~~~~~~~~~~~ vim +/pte_to_hpte_pkey_bits +287 arch/powerpc/include/asm/mmu_context.h 87bbabbed8a770 Ram Pai 2018-01-18 286 d94b827e89dc3f Aneesh Kumar K.V 2020-11-27 @287 static inline u64 pte_to_hpte_pkey_bits(u64 pteflags, unsigned long flags) a6590ca55f1f49 Ram Pai 2018-01-18 288 { a6590ca55f1f49 Ram Pai 2018-01-18 289 return 0x0UL; a6590ca55f1f49 Ram Pai 2018-01-18 290 } a6590ca55f1f49 Ram Pai 2018-01-18 291 :::::: The code at line 287 was first introduced by commit :::::: d94b827e89dc3f92cd871d10f4992a6bd3c861e5 powerpc/book3s64/kuap: Use Key 3 for kernel mapping with hash translation :::::: TO: Aneesh Kumar K.V <aneesh.kumar(a)linux.ibm.com&gt; :::::: CC: Michael Ellerman <mpe(a)ellerman.id.au&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org