Hi Baoquan, kernel test robot noticed the following build errors: [auto build test ERROR on linus/master] [also build test ERROR on v6.7-rc8] [cannot apply to powerpc/next powerpc/fixes tip/x86/core arm64/for-next/core next-20240105] [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/Baoquan-He/kexec_core-move-kdump-related-codes-from-crash_core-c-to-kexec_core-c/20240105-223735 base: linus/master patch link: https://lore.kernel.org/r/20240105103305.557273-2-bhe%40redhat.com patch subject: [PATCH 1/5] kexec_core: move kdump related codes from crash_core.c to kexec_core.c config: x86_64-randconfig-104-20240106 (https://download.01.org/0day-ci/archive/20240106/202401061800.3XPSaPsa-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240106/202401061800.3XPSaPsa-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/202401061800.3XPSaPsa-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from include/linux/string.h:11, from include/linux/bitmap.h:12, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from arch/x86/kernel/crash.c:18: arch/x86/kernel/crash.c: In function 'fill_up_crash_elf_data': >> include/linux/overflow.h:293:23: error: invalid application of 'sizeof' to incomplete type 'struct crash_mem' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ >> include/linux/overflow.h:277:38: error: invalid use of undefined type 'struct crash_mem' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ In file included from include/linux/container_of.h:5, from include/linux/kernel.h:22, from arch/x86/kernel/crash.c:17: include/linux/overflow.h:277:69: error: invalid use of undefined type 'struct crash_mem' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:277:50: note: in expansion of macro '__must_be_array' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~~~~~~~~~~~~~~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:277:69: error: invalid use of undefined type 'struct crash_mem' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:277:50: note: in expansion of macro '__must_be_array' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~~~~~~~~~~~~~~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/build_bug.h:16:51: error: bit-field '<anonymous>' width not an integer constant 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:33: note: in expansion of macro 'BUILD_BUG_ON_ZERO' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~~~~~~~ include/linux/overflow.h:277:50: note: in expansion of macro '__must_be_array' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~~~~~~~~~~~~~~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:278:44: error: invalid use of undefined type 'struct crash_mem' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:278:75: error: invalid use of undefined type 'struct crash_mem' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:278:56: note: in expansion of macro '__must_be_array' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~~~~~~~~~~~~~~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:278:75: error: invalid use of undefined type 'struct crash_mem' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:278:56: note: in expansion of macro '__must_be_array' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~~~~~~~~~~~~~~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/build_bug.h:16:51: error: bit-field '<anonymous>' width not an integer constant 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:33: note: in expansion of macro 'BUILD_BUG_ON_ZERO' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~~~~~~~ include/linux/overflow.h:278:56: note: in expansion of macro '__must_be_array' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~~~~~~~~~~~~~~ include/linux/overflow.h:293:32: note: in expansion of macro 'flex_array_size' 293 | sizeof(*(p)) + flex_array_size(p, member, count), \ | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:294:32: error: invalid application of 'sizeof' to incomplete type 'struct crash_mem' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ >> include/linux/overflow.h:277:38: error: invalid use of undefined type 'struct crash_mem' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:277:69: error: invalid use of undefined type 'struct crash_mem' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:277:50: note: in expansion of macro '__must_be_array' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~~~~~~~~~~~~~~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:277:69: error: invalid use of undefined type 'struct crash_mem' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:277:50: note: in expansion of macro '__must_be_array' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~~~~~~~~~~~~~~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/build_bug.h:16:51: error: bit-field '<anonymous>' width not an integer constant 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:33: note: in expansion of macro 'BUILD_BUG_ON_ZERO' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~~~~~~~ include/linux/overflow.h:277:50: note: in expansion of macro '__must_be_array' 277 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ | ^~~~~~~~~~~~~~~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:278:44: error: invalid use of undefined type 'struct crash_mem' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:278:75: error: invalid use of undefined type 'struct crash_mem' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:278:56: note: in expansion of macro '__must_be_array' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~~~~~~~~~~~~~~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/overflow.h:278:75: error: invalid use of undefined type 'struct crash_mem' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:51: note: in expansion of macro '__same_type' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:278:56: note: in expansion of macro '__must_be_array' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~~~~~~~~~~~~~~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ include/linux/build_bug.h:16:51: error: bit-field '<anonymous>' width not an integer constant 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:228:33: note: in expansion of macro 'BUILD_BUG_ON_ZERO' 228 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~~~~~~~ include/linux/overflow.h:278:56: note: in expansion of macro '__must_be_array' 278 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) | ^~~~~~~~~~~~~~~ include/linux/overflow.h:294:40: note: in expansion of macro 'flex_array_size' 294 | size_add(sizeof(*(p)), flex_array_size(p, member, count))) | ^~~~~~~~~~~~~~~ arch/x86/kernel/crash.c:154:24: note: in expansion of macro 'struct_size' 154 | cmem = vzalloc(struct_size(cmem, ranges, nr_ranges)); | ^~~~~~~~~~~ >> arch/x86/kernel/crash.c:158:13: error: invalid use of undefined type 'struct crash_mem' 158 | cmem->max_nr_ranges = nr_ranges; | ^~ arch/x86/kernel/crash.c:159:13: error: invalid use of undefined type 'struct crash_mem' 159 | cmem->nr_ranges = 0; | ^~ arch/x86/kernel/crash.c: In function 'elf_header_exclude_ranges': >> arch/x86/kernel/crash.c:173:15: error: implicit declaration of function 'crash_exclude_mem_range' [-Werror=implicit-function-declaration] 173 | ret = crash_exclude_mem_range(cmem, 0, (1<<20)-1); | ^~~~~~~~~~~~~~~~~~~~~~~ arch/x86/kernel/crash.c: In function 'prepare_elf64_ram_headers_callback': arch/x86/kernel/crash.c:193:13: error: invalid use of undefined type 'struct crash_mem' 193 | cmem->ranges[cmem->nr_ranges].start = res->start; | ^~ arch/x86/kernel/crash.c:193:26: error: invalid use of undefined type 'struct crash_mem' 193 | cmem->ranges[cmem->nr_ranges].start = res->start; | ^~ arch/x86/kernel/crash.c:194:13: error: invalid use of undefined type 'struct crash_mem' 194 | cmem->ranges[cmem->nr_ranges].end = res->end; | ^~ arch/x86/kernel/crash.c:194:26: error: invalid use of undefined type 'struct crash_mem' 194 | cmem->ranges[cmem->nr_ranges].end = res->end; | ^~ arch/x86/kernel/crash.c:195:13: error: invalid use of undefined type 'struct crash_mem' 195 | cmem->nr_ranges++; | ^~ arch/x86/kernel/crash.c: In function 'prepare_elf_headers': arch/x86/kernel/crash.c:221:30: error: invalid use of undefined type 'struct crash_mem' 221 | *nr_mem_ranges = cmem->nr_ranges; | ^~ >> arch/x86/kernel/crash.c:224:16: error: implicit declaration of function 'crash_prepare_elf64_headers'; did you mean 'prepare_elf_headers'? [-Werror=implicit-function-declaration] 224 | ret = crash_prepare_elf64_headers(cmem, IS_ENABLED(CONFIG_X86_64), addr, sz); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ | prepare_elf_headers cc1: some warnings being treated as errors vim +293 include/linux/overflow.h 610b15c50e86eb Kees Cook 2018-05-07 262 b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 263 /** b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 264 * flex_array_size() - Calculate size of a flexible array member b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 265 * within an enclosing structure. b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 266 * @p: Pointer to the structure. b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 267 * @member: Name of the flexible array member. b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 268 * @count: Number of elements in the array. b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 269 * b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 270 * Calculates size of a flexible array of @count number of @member b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 271 * elements, at the end of structure @p. b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 272 * b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 273 * Return: number of bytes needed or SIZE_MAX on overflow. b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 274 */ b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 275 #define flex_array_size(p, member, count) \ 230f6fa2c1db6a Kees Cook 2022-02-09 276 __builtin_choose_expr(__is_constexpr(count), \ 230f6fa2c1db6a Kees Cook 2022-02-09 @277 (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \ 230f6fa2c1db6a Kees Cook 2022-02-09 278 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member))) b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 279 e1be43d9b5d0d1 Kees Cook 2021-09-18 280 /** e1be43d9b5d0d1 Kees Cook 2021-09-18 281 * struct_size() - Calculate size of structure with trailing flexible array. e1be43d9b5d0d1 Kees Cook 2021-09-18 282 * @p: Pointer to the structure. e1be43d9b5d0d1 Kees Cook 2021-09-18 283 * @member: Name of the array member. e1be43d9b5d0d1 Kees Cook 2021-09-18 284 * @count: Number of elements in the array. e1be43d9b5d0d1 Kees Cook 2021-09-18 285 * d67790ddf0219a Kees Cook 2023-05-22 286 * Calculates size of memory needed for structure of @p followed by an e1be43d9b5d0d1 Kees Cook 2021-09-18 287 * array of @count number of @member elements. e1be43d9b5d0d1 Kees Cook 2021-09-18 288 * e1be43d9b5d0d1 Kees Cook 2021-09-18 289 * Return: number of bytes needed or SIZE_MAX on overflow. e1be43d9b5d0d1 Kees Cook 2021-09-18 290 */ e1be43d9b5d0d1 Kees Cook 2021-09-18 291 #define struct_size(p, member, count) \ 230f6fa2c1db6a Kees Cook 2022-02-09 292 __builtin_choose_expr(__is_constexpr(count), \ 230f6fa2c1db6a Kees Cook 2022-02-09 @293 sizeof(*(p)) + flex_array_size(p, member, count), \ 230f6fa2c1db6a Kees Cook 2022-02-09 294 size_add(sizeof(*(p)), flex_array_size(p, member, count))) e1be43d9b5d0d1 Kees Cook 2021-09-18 295 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
