Hi Oscar, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on sj/damon/next powerpc/next powerpc/fixes linus/master v6.10-rc6 next-20240703] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Oscar-Salvador/arch-x86-Drop-own-definition-of-pgd-p4d_leaf/20240705-042640 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20240704043132.28501-6-osalvador%40suse.de patch subject: [PATCH 05/45] mm/pagewalk: Enable walk_pmd_range to handle cont-pmds config: um-allnoconfig (https://download.01.org/0day-ci/archive/20240706/202407060025.WIFWw7WY-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240706/202407060025.WIFWw7WY-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202407060025.WIFWw7WY-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from mm/pagewalk.c:3: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:14: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 548 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from mm/pagewalk.c:3: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:14: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from mm/pagewalk.c:3: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:14: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 585 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 693 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 701 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 709 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 718 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 727 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 736 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> mm/pagewalk.c:91:11: error: call to undeclared function 'pmd_cont_addr_end'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 91 | next = pmd_cont_addr_end(addr, end); | ^ 12 warnings and 1 error generated. vim +/pmd_cont_addr_end +91 mm/pagewalk.c 75 76 static int walk_pmd_range(pud_t *pud, unsigned long addr, unsigned long end, 77 struct mm_walk *walk) 78 { 79 pmd_t *pmd; 80 unsigned long next; 81 const struct mm_walk_ops *ops = walk->ops; 82 int err = 0; 83 int depth = real_depth(3); 84 int cont_pmds; 85 86 pmd = pmd_offset(pud, addr); 87 do { 88 again: 89 if (pmd_cont(*pmd)) { 90 cont_pmds = CONT_PMDS; > 91 next = pmd_cont_addr_end(addr, end); 92 } else { 93 cont_pmds = 1; 94 next = pmd_addr_end(addr, end); 95 } 96 if (pmd_none(*pmd)) { 97 if (ops->pte_hole) 98 err = ops->pte_hole(addr, next, depth, walk); 99 if (err) 100 break; 101 continue; 102 } 103 104 walk->action = ACTION_SUBTREE; 105 106 /* 107 * This implies that each ->pmd_entry() handler 108 * needs to know about pmd_trans_huge() pmds 109 */ 110 if (ops->pmd_entry) 111 err = ops->pmd_entry(pmd, addr, next, walk); 112 if (err) 113 break; 114 115 if (walk->action == ACTION_AGAIN) 116 goto again; 117 118 /* 119 * Check this here so we only break down trans_huge 120 * pages when we _need_ to 121 */ 122 if ((!walk->vma && (pmd_leaf(*pmd) || !pmd_present(*pmd))) || 123 walk->action == ACTION_CONTINUE || 124 !(ops->pte_entry)) 125 continue; 126 127 if (walk->vma) 128 split_huge_pmd(walk->vma, pmd, addr); 129 130 err = walk_pte_range(pmd, addr, next, walk); 131 if (err) 132 break; 133 134 if (walk->action == ACTION_AGAIN) 135 goto again; 136 } while (pmd += cont_pmds, addr = next, addr != end); 137 138 return err; 139 } 140 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
