tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/core head: 39158b76c2ab8784b5f9053a4eb0d2aebd8a0d87 commit: 2f1e2f091ad0ea159bc7e6f3df996839cf0a6c06 [13/16] perf/core: Fix arch_perf_get_page_size() config: mips-allmodconfig (attached as .config) compiler: mips-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/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue perf/core git checkout 2f1e2f091ad0ea159bc7e6f3df996839cf0a6c06 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): kernel/events/core.c:6541:6: warning: no previous prototype for 'perf_pmu_snapshot_aux' [-Wmissing-prototypes] 6541 | long perf_pmu_snapshot_aux(struct perf_buffer *rb, | ^~~~~~~~~~~~~~~~~~~~~ kernel/events/core.c: In function 'perf_get_tlb_page_size': 7033 | p4dp = p4d_offset_lockless(pgdp, pgd, addr); | ^~~~~~~~~~~~~~~~~~~ | ptep_get_lockless 7033 | p4dp = p4d_offset_lockless(pgdp, pgd, addr); | ^ 7041 | pudp = pud_offset_lockless(p4dp, p4d, addr); | ^~~~~~~~~~~~~~~~~~~ | ptep_get_lockless 7041 | pudp = pud_offset_lockless(p4dp, p4d, addr); | ^ 7049 | pmdp = pmd_offset_lockless(pudp, pud, addr); | ^~~~~~~~~~~~~~~~~~~ | ptep_get_lockless 7049 | pmdp = pmd_offset_lockless(pudp, pud, addr); | ^ cc1: some warnings being treated as errors vim +7033 kernel/events/core.c 7010 7011 /* 7012 * Return the MMU/TLB page size of a given virtual address. 7013 */ 7014 static u64 perf_get_tlb_page_size(struct mm_struct *mm, unsigned long addr) 7015 { 7016 u64 size = 0; 7017 7018 #ifdef CONFIG_HAVE_FAST_GUP 7019 pgd_t *pgdp, pgd; 7020 p4d_t *p4dp, p4d; 7021 pud_t *pudp, pud; 7022 pmd_t *pmdp, pmd; 7023 pte_t *ptep, pte; 7024 7025 pgdp = pgd_offset(mm, addr); 7026 pgd = READ_ONCE(*pgdp); 7027 if (pgd_none(pgd)) 7028 return 0; 7029 7030 if (pgd_leaf(pgd)) 7031 return pgd_leaf_size(pgd); 7032 7034 p4d = READ_ONCE(*p4dp); 7035 if (!p4d_present(p4d)) 7036 return 0; 7037 7038 if (p4d_leaf(p4d)) 7039 return p4d_leaf_size(p4d); 7040 7042 pud = READ_ONCE(*pudp); 7043 if (!pud_present(pud)) 7044 return 0; 7045 7046 if (pud_leaf(pud)) 7047 return pud_leaf_size(pud); 7048 7050 pmd = READ_ONCE(*pmdp); 7051 if (!pmd_present(pmd)) 7052 return 0; 7053 7054 if (pmd_leaf(pmd)) 7055 return pmd_leaf_size(pmd); 7056 7057 ptep = pte_offset_map(&pmd, addr); 7058 pte = ptep_get_lockless(ptep); 7059 if (pte_present(pte)) 7060 size = pte_leaf_size(pte); 7061 pte_unmap(ptep); 7062 #endif /* CONFIG_HAVE_FAST_GUP */ 7063 7064 return size; 7065 } 7066 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org