[kbuild-all] Re: [linux-next:master 952/3956] crypto/blake2b_generic.c:73:13: warning: stack frame size of 9776 bytes in function 'blake2b_compress_one_generic'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b3a3cbdec55b090d22a09f75efb7c7d34cb97f25 commit: 28dcca4cc0c01e2467549a36b1b0eacfdb01236c [952/3956] crypto: blake2b - sync with blake2s implementation config: powerpc64-randconfig-r021-20210115 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5b42fd8dd4e7e29125a09a41a33af7c9cb57d144) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 28dcca4cc0c01e2467549a36b1b0eacfdb01236c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): >> crypto/blake2b_generic.c:73:13: warning: stack frame size of 9776 bytes in function 'blake2b_compress_one_generic' [-Wframe-larger-than=] static void blake2b_compress_one_generic(struct blake2b_state *S, ^ 1 warning generated. vim +/blake2b_compress_one_generic +73 crypto/blake2b_generic.c 48 49 #define G(r,i,a,b,c,d) \ 50 do { \ 51 a = a + b + m[blake2b_sigma[r][2*i+0]]; \ 52 d = ror64(d ^ a, 32); \ 53 c = c + d; \ 54 b = ror64(b ^ c, 24); \ 55 a = a + b + m[blake2b_sigma[r][2*i+1]]; \ 56 d = ror64(d ^ a, 16); \ 57 c = c + d; \ 58 b = ror64(b ^ c, 63); \ 59 } while (0) 60 61 #define ROUND(r) \ 62 do { \ 63 G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \ 64 G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \ 65 G(r,2,v[ 2],v[ 6],v[10],v[14]); \ 66 G(r,3,v[ 3],v[ 7],v[11],v[15]); \ 67 G(r,4,v[ 0],v[ 5],v[10],v[15]); \ 68 G(r,5,v[ 1],v[ 6],v[11],v[12]); \ 69 G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \ 70 G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \ 71 } while (0) 72 > 73 static void blake2b_compress_one_generic(struct blake2b_state *S, 74 const u8 block[BLAKE2B_BLOCK_SIZE]) 75 { 76 u64 m[16]; 77 u64 v[16]; 78 size_t i; 79 80 for (i = 0; i < 16; ++i) 81 m[i] = get_unaligned_le64(block + i * sizeof(m[i])); 82 83 for (i = 0; i < 8; ++i) 84 v[i] = S->h[i]; 85 86 v[ 8] = BLAKE2B_IV0; 87 v[ 9] = BLAKE2B_IV1; 88 v[10] = BLAKE2B_IV2; 89 v[11] = BLAKE2B_IV3; 90 v[12] = BLAKE2B_IV4 ^ S->t[0]; 91 v[13] = BLAKE2B_IV5 ^ S->t[1]; 92 v[14] = BLAKE2B_IV6 ^ S->f[0]; 93 v[15] = BLAKE2B_IV7 ^ S->f[1]; 94 95 ROUND(0); 96 ROUND(1); 97 ROUND(2); 98 ROUND(3); 99 ROUND(4); 100 ROUND(5); 101 ROUND(6); 102 ROUND(7); 103 ROUND(8); 104 ROUND(9); 105 ROUND(10); 106 ROUND(11); 107 #ifdef CONFIG_CC_IS_CLANG 108 #pragma nounroll /* https://bugs.llvm.org/show_bug.cgi?id=45803 */ 109 #endif 110 for (i = 0; i < 8; ++i) 111 S->h[i] = S->h[i] ^ v[i] ^ v[i + 8]; 112 } 113 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org