Messages in this thread | | | Date | Sat, 26 Jun 2021 03:12:40 +0800 | From | kernel test robot <> | Subject | lib/bitfield_kunit.c:60:20: warning: stack frame size (11392) exceeds limit (8192) in function 'test_bitfields_constants' |
| |
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 44db63d1ad8d71c6932cbe007eb41f31c434d140 commit: d2585f5164c298aaaed14c2c8d313cbe7bd5b253 lib: kunit: add bitfield test conversion to KUnit date: 9 months ago config: riscv-randconfig-r023-20210625 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9ca0171a9ffdef5fdb1511d197a3fd72490362de) 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 # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d2585f5164c298aaaed14c2c8d313cbe7bd5b253 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d2585f5164c298aaaed14c2c8d313cbe7bd5b253 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
lib/bitfield_kunit.c:136:21: warning: implicit conversion from 'int' to 'u16' (aka 'unsigned short') changes value from 393216 to 0 [-Wconstant-conversion] u16_encode_bits(0, 0x60000); ~~~~~~~~~~~~~~~ ^~~~~~~ lib/bitfield_kunit.c:129:20: warning: unused function 'test_bitfields_compile' [-Wunused-function] static void __init test_bitfields_compile(struct kunit *context) ^ >> lib/bitfield_kunit.c:60:20: warning: stack frame size (11392) exceeds limit (8192) in function 'test_bitfields_constants' [-Wframe-larger-than] static void __init test_bitfields_constants(struct kunit *context) ^ 3 warnings generated.
vim +/test_bitfields_constants +60 lib/bitfield_kunit.c
10 11 #define CHECK_ENC_GET_U(tp, v, field, res) do { \ 12 { \ 13 u##tp _res; \ 14 \ 15 _res = u##tp##_encode_bits(v, field); \ 16 KUNIT_ASSERT_FALSE_MSG(context, _res != res, \ 17 "u" #tp "_encode_bits(" #v ", " #field ") is 0x%llx != " #res "\n", \ 18 (u64)_res); \ 19 KUNIT_ASSERT_FALSE(context, \ 20 u##tp##_get_bits(_res, field) != v); \ 21 } \ 22 } while (0) 23 24 #define CHECK_ENC_GET_LE(tp, v, field, res) do { \ 25 { \ 26 __le##tp _res; \ 27 \ 28 _res = le##tp##_encode_bits(v, field); \ 29 KUNIT_ASSERT_FALSE_MSG(context, \ 30 _res != cpu_to_le##tp(res), \ 31 "le" #tp "_encode_bits(" #v ", " #field ") is 0x%llx != 0x%llx",\ 32 (u64)le##tp##_to_cpu(_res), \ 33 (u64)(res)); \ 34 KUNIT_ASSERT_FALSE(context, \ 35 le##tp##_get_bits(_res, field) != v);\ 36 } \ 37 } while (0) 38 39 #define CHECK_ENC_GET_BE(tp, v, field, res) do { \ 40 { \ 41 __be##tp _res; \ 42 \ 43 _res = be##tp##_encode_bits(v, field); \ 44 KUNIT_ASSERT_FALSE_MSG(context, \ 45 _res != cpu_to_be##tp(res), \ 46 "be" #tp "_encode_bits(" #v ", " #field ") is 0x%llx != 0x%llx", \ 47 (u64)be##tp##_to_cpu(_res), \ 48 (u64)(res)); \ 49 KUNIT_ASSERT_FALSE(context, \ 50 be##tp##_get_bits(_res, field) != v);\ 51 } \ 52 } while (0) 53 54 #define CHECK_ENC_GET(tp, v, field, res) do { \ 55 CHECK_ENC_GET_U(tp, v, field, res); \ 56 CHECK_ENC_GET_LE(tp, v, field, res); \ 57 CHECK_ENC_GET_BE(tp, v, field, res); \ 58 } while (0) 59 > 60 static void __init test_bitfields_constants(struct kunit *context) 61 { 62 /* 63 * NOTE 64 * This whole function compiles (or at least should, if everything 65 * is going according to plan) to nothing after optimisation. 66 */ 67 68 CHECK_ENC_GET(16, 1, 0x000f, 0x0001); 69 CHECK_ENC_GET(16, 3, 0x00f0, 0x0030); 70 CHECK_ENC_GET(16, 5, 0x0f00, 0x0500); 71 CHECK_ENC_GET(16, 7, 0xf000, 0x7000); 72 CHECK_ENC_GET(16, 14, 0x000f, 0x000e); 73 CHECK_ENC_GET(16, 15, 0x00f0, 0x00f0); 74 75 CHECK_ENC_GET_U(8, 1, 0x0f, 0x01); 76 CHECK_ENC_GET_U(8, 3, 0xf0, 0x30); 77 CHECK_ENC_GET_U(8, 14, 0x0f, 0x0e); 78 CHECK_ENC_GET_U(8, 15, 0xf0, 0xf0); 79 80 CHECK_ENC_GET(32, 1, 0x00000f00, 0x00000100); 81 CHECK_ENC_GET(32, 3, 0x0000f000, 0x00003000); 82 CHECK_ENC_GET(32, 5, 0x000f0000, 0x00050000); 83 CHECK_ENC_GET(32, 7, 0x00f00000, 0x00700000); 84 CHECK_ENC_GET(32, 14, 0x0f000000, 0x0e000000); 85 CHECK_ENC_GET(32, 15, 0xf0000000, 0xf0000000); 86 87 CHECK_ENC_GET(64, 1, 0x00000f0000000000ull, 0x0000010000000000ull); 88 CHECK_ENC_GET(64, 3, 0x0000f00000000000ull, 0x0000300000000000ull); 89 CHECK_ENC_GET(64, 5, 0x000f000000000000ull, 0x0005000000000000ull); 90 CHECK_ENC_GET(64, 7, 0x00f0000000000000ull, 0x0070000000000000ull); 91 CHECK_ENC_GET(64, 14, 0x0f00000000000000ull, 0x0e00000000000000ull); 92 CHECK_ENC_GET(64, 15, 0xf000000000000000ull, 0xf000000000000000ull); 93 } 94
--- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org [unhandled content-type:application/gzip] | |