Hi Kefeng, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Kefeng-Wang/mm-make-show_free_areas-static/20230629-182958 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230629104357.35455-2-wangkefeng.wang%40huawei.com patch subject: [PATCH 2/2] mm: make show_free_areas() static config: riscv-randconfig-r042-20230629 (https://download.01.org/0day-ci/archive/20230629/202306292233.w0XhREe0-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20230629/202306292233.w0XhREe0-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/202306292233.w0XhREe0-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: 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:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:751:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 751 | insw(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw' 105 | #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from mm/nommu.c:23: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: 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:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:759:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 759 | insl(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl' 106 | #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from mm/nommu.c:23: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: 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:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:768:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 768 | outsb(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb' 118 | #define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from mm/nommu.c:23: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: 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:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:777:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 777 | outsw(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw' 119 | #define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from mm/nommu.c:23: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: 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:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:786:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 786 | outsl(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl' 120 | #define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from mm/nommu.c:23: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: 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:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:1134:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 1134 | return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; | ~~~~~~~~~~ ^ >> mm/nommu.c:1239:2: error: call to undeclared function 'show_free_areas'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1239 | show_free_areas(0, NULL); | ^ 13 warnings and 1 error generated. vim +/show_free_areas +1239 mm/nommu.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 996 ^1da177e4c3f41 Linus Torvalds 2005-04-16 997 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 998 * handle mapping creation for uClinux ^1da177e4c3f41 Linus Torvalds 2005-04-16 999 */ 1fcfd8db7f82fa Oleg Nesterov 2015-09-09 1000 unsigned long do_mmap(struct file *file, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1001 unsigned long addr, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1002 unsigned long len, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1003 unsigned long prot, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1004 unsigned long flags, bebeb3d68b24bb Michel Lespinasse 2013-02-22 1005 unsigned long pgoff, 897ab3e0c49e24 Mike Rapoport 2017-02-24 1006 unsigned long *populate, 897ab3e0c49e24 Mike Rapoport 2017-02-24 1007 struct list_head *uf) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1008 { 8feae13110d60c David Howells 2009-01-08 1009 struct vm_area_struct *vma; 8feae13110d60c David Howells 2009-01-08 1010 struct vm_region *region; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1011 struct rb_node *rb; 45e55300f11495 Peter Collingbourne 2020-08-06 1012 vm_flags_t vm_flags; 1fcfd8db7f82fa Oleg Nesterov 2015-09-09 1013 unsigned long capabilities, result; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1014 int ret; 47d9644de92c1a Liam R. Howlett 2023-01-20 1015 VMA_ITERATOR(vmi, current->mm, 0); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1016 41badc15cbad03 Michel Lespinasse 2013-02-22 1017 *populate = 0; bebeb3d68b24bb Michel Lespinasse 2013-02-22 1018 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1019 /* decide whether we should attempt the mapping, and if so what sort of ^1da177e4c3f41 Linus Torvalds 2005-04-16 1020 * mapping */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 1021 ret = validate_mmap_request(file, addr, len, prot, flags, pgoff, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1022 &capabilities); 22cc877b32202b Leon Romanovsky 2015-06-24 1023 if (ret < 0) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1024 return ret; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1025 06aab5a3084e1d David Howells 2009-09-24 1026 /* we ignore the address hint */ 06aab5a3084e1d David Howells 2009-09-24 1027 addr = 0; f67d9b1576c1c6 Bob Liu 2011-05-24 1028 len = PAGE_ALIGN(len); 06aab5a3084e1d David Howells 2009-09-24 1029 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1030 /* we've determined that we can make the mapping, now translate what we ^1da177e4c3f41 Linus Torvalds 2005-04-16 1031 * now know into VMA flags */ 45e55300f11495 Peter Collingbourne 2020-08-06 1032 vm_flags = determine_vm_flags(file, prot, flags, capabilities); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1033 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1034) 8feae13110d60c David Howells 2009-01-08 1035 /* we're going to need to record the mapping */ 8feae13110d60c David Howells 2009-01-08 1036 region = kmem_cache_zalloc(vm_region_jar, GFP_KERNEL); 8feae13110d60c David Howells 2009-01-08 1037 if (!region) 8feae13110d60c David Howells 2009-01-08 1038 goto error_getting_region; 8feae13110d60c David Howells 2009-01-08 1039 490fc053865c9c Linus Torvalds 2018-07-21 1040 vma = vm_area_alloc(current->mm); 8feae13110d60c David Howells 2009-01-08 1041 if (!vma) 8feae13110d60c David Howells 2009-01-08 1042 goto error_getting_vma; 8feae13110d60c David Howells 2009-01-08 1043 47d9644de92c1a Liam R. Howlett 2023-01-20 1044 if (vma_iter_prealloc(&vmi)) 47d9644de92c1a Liam R. Howlett 2023-01-20 1045 goto error_vma_iter_prealloc; 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1046) 1e2ae599d37e60 David Howells 2010-01-15 1047 region->vm_usage = 1; 8feae13110d60c David Howells 2009-01-08 1048 region->vm_flags = vm_flags; 8feae13110d60c David Howells 2009-01-08 1049 region->vm_pgoff = pgoff; 8feae13110d60c David Howells 2009-01-08 1050 1c71222e5f2393 Suren Baghdasaryan 2023-01-26 1051 vm_flags_init(vma, vm_flags); 8feae13110d60c David Howells 2009-01-08 1052 vma->vm_pgoff = pgoff; 8feae13110d60c David Howells 2009-01-08 1053 8feae13110d60c David Howells 2009-01-08 1054 if (file) { cb0942b8124979 Al Viro 2012-08-27 1055 region->vm_file = get_file(file); cb0942b8124979 Al Viro 2012-08-27 1056 vma->vm_file = get_file(file); 8feae13110d60c David Howells 2009-01-08 1057 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1058 8feae13110d60c David Howells 2009-01-08 1059 down_write(&nommu_region_sem); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1060 8feae13110d60c David Howells 2009-01-08 1061 /* if we want to share, we need to check for regions created by other ^1da177e4c3f41 Linus Torvalds 2005-04-16 1062 * mmap() calls that overlap with our proposed mapping 8feae13110d60c David Howells 2009-01-08 1063 * - we can only share with a superset match on most regular files ^1da177e4c3f41 Linus Torvalds 2005-04-16 1064 * - shared mappings on character devices and memory backed files are ^1da177e4c3f41 Linus Torvalds 2005-04-16 1065 * permitted to overlap inexactly as far as we are concerned for in ^1da177e4c3f41 Linus Torvalds 2005-04-16 1066 * these cases, sharing is handled in the driver or filesystem rather ^1da177e4c3f41 Linus Torvalds 2005-04-16 1067 * than here ^1da177e4c3f41 Linus Torvalds 2005-04-16 1068 */ fc4f4be9b5271e David Hildenbrand 2023-01-02 1069 if (is_nommu_shared_mapping(vm_flags)) { 8feae13110d60c David Howells 2009-01-08 1070 struct vm_region *pregion; 8feae13110d60c David Howells 2009-01-08 1071 unsigned long pglen, rpglen, pgend, rpgend, start; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1072 8feae13110d60c David Howells 2009-01-08 1073 pglen = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; 8feae13110d60c David Howells 2009-01-08 1074 pgend = pgoff + pglen; 165b239270be61 David Howells 2007-03-22 1075 8feae13110d60c David Howells 2009-01-08 1076 for (rb = rb_first(&nommu_region_tree); rb; rb = rb_next(rb)) { 8feae13110d60c David Howells 2009-01-08 1077 pregion = rb_entry(rb, struct vm_region, vm_rb); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1078 fc4f4be9b5271e David Hildenbrand 2023-01-02 1079 if (!is_nommu_shared_mapping(pregion->vm_flags)) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1080 continue; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1081 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1082 /* search for overlapping mappings on the same file */ 496ad9aa8ef448 Al Viro 2013-01-23 1083 if (file_inode(pregion->vm_file) != 496ad9aa8ef448 Al Viro 2013-01-23 1084 file_inode(file)) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1085 continue; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1086 8feae13110d60c David Howells 2009-01-08 1087 if (pregion->vm_pgoff >= pgend) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1088 continue; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1089 8feae13110d60c David Howells 2009-01-08 1090 rpglen = pregion->vm_end - pregion->vm_start; 8feae13110d60c David Howells 2009-01-08 1091 rpglen = (rpglen + PAGE_SIZE - 1) >> PAGE_SHIFT; 8feae13110d60c David Howells 2009-01-08 1092 rpgend = pregion->vm_pgoff + rpglen; 8feae13110d60c David Howells 2009-01-08 1093 if (pgoff >= rpgend) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1094 continue; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1095 8feae13110d60c David Howells 2009-01-08 1096 /* handle inexactly overlapping matches between 8feae13110d60c David Howells 2009-01-08 1097 * mappings */ 8feae13110d60c David Howells 2009-01-08 1098 if ((pregion->vm_pgoff != pgoff || rpglen != pglen) && 8feae13110d60c David Howells 2009-01-08 1099 !(pgoff >= pregion->vm_pgoff && pgend <= rpgend)) { 8feae13110d60c David Howells 2009-01-08 1100 /* new mapping is not a subset of the region */ b4caecd48005fb Christoph Hellwig 2015-01-14 1101 if (!(capabilities & NOMMU_MAP_DIRECT)) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1102 goto sharing_violation; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1103 continue; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1104 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1105 8feae13110d60c David Howells 2009-01-08 1106 /* we've found a region we can share */ 1e2ae599d37e60 David Howells 2010-01-15 1107 pregion->vm_usage++; 8feae13110d60c David Howells 2009-01-08 1108 vma->vm_region = pregion; 8feae13110d60c David Howells 2009-01-08 1109 start = pregion->vm_start; 8feae13110d60c David Howells 2009-01-08 1110 start += (pgoff - pregion->vm_pgoff) << PAGE_SHIFT; 8feae13110d60c David Howells 2009-01-08 1111 vma->vm_start = start; 8feae13110d60c David Howells 2009-01-08 1112 vma->vm_end = start + len; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1113 22cc877b32202b Leon Romanovsky 2015-06-24 1114 if (pregion->vm_flags & VM_MAPPED_COPY) 1c71222e5f2393 Suren Baghdasaryan 2023-01-26 1115 vm_flags_set(vma, VM_MAPPED_COPY); 22cc877b32202b Leon Romanovsky 2015-06-24 1116 else { 8feae13110d60c David Howells 2009-01-08 1117 ret = do_mmap_shared_file(vma); 8feae13110d60c David Howells 2009-01-08 1118 if (ret < 0) { 8feae13110d60c David Howells 2009-01-08 1119 vma->vm_region = NULL; 8feae13110d60c David Howells 2009-01-08 1120 vma->vm_start = 0; 8feae13110d60c David Howells 2009-01-08 1121 vma->vm_end = 0; 1e2ae599d37e60 David Howells 2010-01-15 1122 pregion->vm_usage--; 8feae13110d60c David Howells 2009-01-08 1123 pregion = NULL; 8feae13110d60c David Howells 2009-01-08 1124 goto error_just_free; 8feae13110d60c David Howells 2009-01-08 1125 } 8feae13110d60c David Howells 2009-01-08 1126 } 8feae13110d60c David Howells 2009-01-08 1127 fput(region->vm_file); 8feae13110d60c David Howells 2009-01-08 1128 kmem_cache_free(vm_region_jar, region); 8feae13110d60c David Howells 2009-01-08 1129 region = pregion; 8feae13110d60c David Howells 2009-01-08 1130 result = start; 8feae13110d60c David Howells 2009-01-08 1131 goto share; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1132 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1133 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1134 /* obtain the address at which to make a shared mapping ^1da177e4c3f41 Linus Torvalds 2005-04-16 1135 * - this is the hook for quasi-memory character devices to ^1da177e4c3f41 Linus Torvalds 2005-04-16 1136 * tell us the location of a shared mapping ^1da177e4c3f41 Linus Torvalds 2005-04-16 1137 */ b4caecd48005fb Christoph Hellwig 2015-01-14 1138 if (capabilities & NOMMU_MAP_DIRECT) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 1139 addr = file->f_op->get_unmapped_area(file, addr, len, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1140 pgoff, flags); bb005a59e08733 Namhyung Kim 2011-05-24 1141 if (IS_ERR_VALUE(addr)) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 1142 ret = addr; bb005a59e08733 Namhyung Kim 2011-05-24 1143 if (ret != -ENOSYS) 8feae13110d60c David Howells 2009-01-08 1144 goto error_just_free; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1145 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1146 /* the driver refused to tell us where to site ^1da177e4c3f41 Linus Torvalds 2005-04-16 1147 * the mapping so we'll have to attempt to copy ^1da177e4c3f41 Linus Torvalds 2005-04-16 1148 * it */ bb005a59e08733 Namhyung Kim 2011-05-24 1149 ret = -ENODEV; b4caecd48005fb Christoph Hellwig 2015-01-14 1150 if (!(capabilities & NOMMU_MAP_COPY)) 8feae13110d60c David Howells 2009-01-08 1151 goto error_just_free; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1152 b4caecd48005fb Christoph Hellwig 2015-01-14 1153 capabilities &= ~NOMMU_MAP_DIRECT; 8feae13110d60c David Howells 2009-01-08 1154 } else { 8feae13110d60c David Howells 2009-01-08 1155 vma->vm_start = region->vm_start = addr; 8feae13110d60c David Howells 2009-01-08 1156 vma->vm_end = region->vm_end = addr + len; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1157 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1158 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1159 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1160 8feae13110d60c David Howells 2009-01-08 1161 vma->vm_region = region; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1162 645d83c5db970a David Howells 2009-09-24 1163 /* set up the mapping b4caecd48005fb Christoph Hellwig 2015-01-14 1164 * - the region is filled in if NOMMU_MAP_DIRECT is still set 645d83c5db970a David Howells 2009-09-24 1165 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 1166 if (file && vma->vm_flags & VM_SHARED) 8feae13110d60c David Howells 2009-01-08 1167 ret = do_mmap_shared_file(vma); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1168 else 645d83c5db970a David Howells 2009-09-24 1169 ret = do_mmap_private(vma, region, len, capabilities); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1170 if (ret < 0) 645d83c5db970a David Howells 2009-09-24 1171 goto error_just_free; 645d83c5db970a David Howells 2009-09-24 1172 add_nommu_region(region); 8feae13110d60c David Howells 2009-01-08 1173 ea637639591def Jie Zhang 2009-12-14 1174 /* clear anonymous mappings that don't ask for uninitialized data */ 0bf5f9492389aa Christoph Hellwig 2019-07-16 1175 if (!vma->vm_file && 0bf5f9492389aa Christoph Hellwig 2019-07-16 1176 (!IS_ENABLED(CONFIG_MMAP_ALLOW_UNINITIALIZED) || 0bf5f9492389aa Christoph Hellwig 2019-07-16 1177 !(flags & MAP_UNINITIALIZED))) ea637639591def Jie Zhang 2009-12-14 1178 memset((void *)region->vm_start, 0, ea637639591def Jie Zhang 2009-12-14 1179 region->vm_end - region->vm_start); ea637639591def Jie Zhang 2009-12-14 1180 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1181 /* okay... we have a mapping; now we have to register it */ 8feae13110d60c David Howells 2009-01-08 1182 result = vma->vm_start; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1183 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1184 current->mm->total_vm += len >> PAGE_SHIFT; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1185 8feae13110d60c David Howells 2009-01-08 1186 share: 07f1bc5ad79833 Liam R. Howlett 2023-01-20 1187 BUG_ON(!vma->vm_region); 07f1bc5ad79833 Liam R. Howlett 2023-01-20 1188 setup_vma_to_mm(vma, current->mm); 07f1bc5ad79833 Liam R. Howlett 2023-01-20 1189 current->mm->map_count++; 07f1bc5ad79833 Liam R. Howlett 2023-01-20 1190 /* add the VMA to the tree */ 07f1bc5ad79833 Liam R. Howlett 2023-01-20 1191 vma_iter_store(&vmi, vma); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1192 cfe79c00a2f4f6 Mike Frysinger 2010-01-06 1193 /* we flush the region from the icache only when the first executable cfe79c00a2f4f6 Mike Frysinger 2010-01-06 1194 * mapping of it is made */ cfe79c00a2f4f6 Mike Frysinger 2010-01-06 1195 if (vma->vm_flags & VM_EXEC && !region->vm_icache_flushed) { a75a2df68f87c4 Christoph Hellwig 2020-06-07 1196 flush_icache_user_range(region->vm_start, region->vm_end); cfe79c00a2f4f6 Mike Frysinger 2010-01-06 1197 region->vm_icache_flushed = true; cfe79c00a2f4f6 Mike Frysinger 2010-01-06 1198 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1199 cfe79c00a2f4f6 Mike Frysinger 2010-01-06 1200 up_write(&nommu_region_sem); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1201 8feae13110d60c David Howells 2009-01-08 1202 return result; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1203 8feae13110d60c David Howells 2009-01-08 1204 error_just_free: 8feae13110d60c David Howells 2009-01-08 1205 up_write(&nommu_region_sem); 8feae13110d60c David Howells 2009-01-08 1206 error: 47d9644de92c1a Liam R. Howlett 2023-01-20 1207 vma_iter_free(&vmi); 89a8640279f8bb David Howells 2009-10-30 1208 if (region->vm_file) 8feae13110d60c David Howells 2009-01-08 1209 fput(region->vm_file); 8feae13110d60c David Howells 2009-01-08 1210 kmem_cache_free(vm_region_jar, region); 89a8640279f8bb David Howells 2009-10-30 1211 if (vma->vm_file) 8feae13110d60c David Howells 2009-01-08 1212 fput(vma->vm_file); 3928d4f5ee37cd Linus Torvalds 2018-07-21 1213 vm_area_free(vma); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1214 return ret; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1215 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1216 sharing_violation: 8feae13110d60c David Howells 2009-01-08 1217 up_write(&nommu_region_sem); 22cc877b32202b Leon Romanovsky 2015-06-24 1218 pr_warn("Attempt to share mismatched mappings\n"); 8feae13110d60c David Howells 2009-01-08 1219 ret = -EINVAL; 8feae13110d60c David Howells 2009-01-08 1220 goto error; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1221 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1222 error_getting_vma: 8feae13110d60c David Howells 2009-01-08 1223 kmem_cache_free(vm_region_jar, region); 22cc877b32202b Leon Romanovsky 2015-06-24 1224 pr_warn("Allocation of vma for %lu byte allocation from process %d failed\n", ^1da177e4c3f41 Linus Torvalds 2005-04-16 1225 len, current->pid); 7c669cfbec1271 Kefeng Wang 2023-06-29 1226 show_mem(); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1227 return -ENOMEM; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1228 8feae13110d60c David Howells 2009-01-08 1229 error_getting_region: 22cc877b32202b Leon Romanovsky 2015-06-24 1230 pr_warn("Allocation of vm region for %lu byte allocation from process %d failed\n", ^1da177e4c3f41 Linus Torvalds 2005-04-16 1231 len, current->pid); 7c669cfbec1271 Kefeng Wang 2023-06-29 1232 show_mem(); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1233 return -ENOMEM; 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1234) 47d9644de92c1a Liam R. Howlett 2023-01-20 1235 error_vma_iter_prealloc: 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1236) kmem_cache_free(vm_region_jar, region); 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1237) vm_area_free(vma); 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1238) pr_warn("Allocation of vma tree for process %d failed\n", current->pid); 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 @1239) show_free_areas(0, NULL); 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1240) return -ENOMEM; 8220543df1489e Matthew Wilcox (Oracle 2022-09-06 1241) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
