tree: https://github.com/hnaz/linux-mm master head: 2bbf0589bfeb27800c730b76eacf34528eee5418 commit: 724648314aafde8dce6440dbc849f80e45b83289 [494/523] mm: pgtable: add shortcuts for accessing kernel PMD and PTE config: powerpc-randconfig-r002-20200515 (attached as .config) compiler: powerpc-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 724648314aafde8dce6440dbc849f80e45b83289 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>, old ones prefixed by <<): arch/powerpc/mm/kasan/kasan_init_32.c: In function 'kasan_unmap_early_shadow_vmalloc': >> arch/powerpc/mm/kasan/kasan_init_32.c:124:16: error: implicit declaration of function 'pmd_ptr_k'; did you mean 'pmd_off_k'? [-Werror=implicit-function-declaration] 124 | pmd_t *pmd = pmd_ptr_k(k_cur); | ^~~~~~~~~ | pmd_off_k >> arch/powerpc/mm/kasan/kasan_init_32.c:124:16: warning: initialization of 'pmd_t *' {aka 'struct <anonymous> *'} from 'int' makes pointer from integer without a cast [-Wint-conversion] cc1: some warnings being treated as errors vim +124 arch/powerpc/mm/kasan/kasan_init_32.c 2edb16efc899f9 Christophe Leroy 2019-04-26 115 3d4247fcc938d0 Christophe Leroy 2020-01-14 116 static void __init kasan_unmap_early_shadow_vmalloc(void) 3d4247fcc938d0 Christophe Leroy 2020-01-14 117 { 3d4247fcc938d0 Christophe Leroy 2020-01-14 118 unsigned long k_start = (unsigned long)kasan_mem_to_shadow((void *)VMALLOC_START); 3d4247fcc938d0 Christophe Leroy 2020-01-14 119 unsigned long k_end = (unsigned long)kasan_mem_to_shadow((void *)VMALLOC_END); 3d4247fcc938d0 Christophe Leroy 2020-01-14 120 unsigned long k_cur; 3d4247fcc938d0 Christophe Leroy 2020-01-14 121 phys_addr_t pa = __pa(kasan_early_shadow_page); 3d4247fcc938d0 Christophe Leroy 2020-01-14 122 3d4247fcc938d0 Christophe Leroy 2020-01-14 123 for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) { 4a93b1104e586f Mike Rapoport 2020-05-16 @124 pmd_t *pmd = pmd_ptr_k(k_cur); 3d4247fcc938d0 Christophe Leroy 2020-01-14 125 pte_t *ptep = pte_offset_kernel(pmd, k_cur); 3d4247fcc938d0 Christophe Leroy 2020-01-14 126 3d4247fcc938d0 Christophe Leroy 2020-01-14 127 if ((pte_val(*ptep) & PTE_RPN_MASK) != pa) 3d4247fcc938d0 Christophe Leroy 2020-01-14 128 continue; 3d4247fcc938d0 Christophe Leroy 2020-01-14 129 3d4247fcc938d0 Christophe Leroy 2020-01-14 130 __set_pte_at(&init_mm, k_cur, ptep, __pte(0), 0); 3d4247fcc938d0 Christophe Leroy 2020-01-14 131 } 3d4247fcc938d0 Christophe Leroy 2020-01-14 132 flush_tlb_kernel_range(k_start, k_end); 3d4247fcc938d0 Christophe Leroy 2020-01-14 133 } 3d4247fcc938d0 Christophe Leroy 2020-01-14 134 :::::: The code at line 124 was first introduced by commit :::::: 4a93b1104e586f284c8400200eabf37a51a961bc powerpc-add-support-for-folded-p4d-page-tables-fix :::::: TO: Mike Rapoport <rppt@xxxxxxxxxxxxx> :::::: CC: Johannes Weiner <hannes@xxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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