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

[kernel test robot <lkp@intel.com>]

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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/commit/?id=28dcca4cc0c01e2467549a36b1b0eacfdb01236c
        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@intel.com>

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

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