linux-kernel - arch/arm/crypto/sha512-glue.c:34:3: warning: cast from 'void (*)(u64 *, const u8 *, int)' (aka 'void (*)(unsigned long long *, const unsigned char *, int)') to 'sha512_block_fn *' (aka 'void (*)(struct sha512_state *, const unsigned char *, int)') convert...

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Date: Tue, 9 Jan 2024 07:06:12 +0800
From: kernel test robot <lkp@...el.com>
To: Robert Elliott <elliott@....com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: arch/arm/crypto/sha512-glue.c:34:3: warning: cast from 'void (*)(u64
 *, const u8 *, int)' (aka 'void (*)(unsigned long long *, const unsigned
 char *, int)') to 'sha512_block_fn *' (aka 'void (*)(struct sha512_state *,
 const unsigned char *, int)') convert...

Hi Robert,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5db8752c3b81bd33a549f6f812bab81e3bb61b20
commit: 4a329fecc9aaebb27a53fa7abfa53bbc2ee42f3f crypto: Kconfig - submenus for arm and arm64
date:   1 year, 4 months ago
config: arm-randconfig-003-20240107 (https://download.01.org/0day-ci/archive/20240109/202401090628.aXpavLWp-lkp@intel.com/config)
compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 7e186d366d6c7def0543acc255931f617e76dff0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240109/202401090628.aXpavLWp-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401090628.aXpavLWp-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm/crypto/sha512-glue.c:34:3: warning: cast from 'void (*)(u64 *, const u8 *, int)' (aka 'void (*)(unsigned long long *, const unsigned char *, int)') to 'sha512_block_fn *' (aka 'void (*)(struct sha512_state *, const unsigned char *, int)') converts to incompatible function type [-Wcast-function-type-strict]
      34 |                 (sha512_block_fn *)sha512_block_data_order);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm/crypto/sha512-glue.c:40:3: warning: cast from 'void (*)(u64 *, const u8 *, int)' (aka 'void (*)(unsigned long long *, const unsigned char *, int)') to 'sha512_block_fn *' (aka 'void (*)(struct sha512_state *, const unsigned char *, int)') converts to incompatible function type [-Wcast-function-type-strict]
      40 |                 (sha512_block_fn *)sha512_block_data_order);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm/crypto/sha512-glue.c:48:3: warning: cast from 'void (*)(u64 *, const u8 *, int)' (aka 'void (*)(unsigned long long *, const unsigned char *, int)') to 'sha512_block_fn *' (aka 'void (*)(struct sha512_state *, const unsigned char *, int)') converts to incompatible function type [-Wcast-function-type-strict]
      48 |                 (sha512_block_fn *)sha512_block_data_order);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   3 warnings generated.


vim +34 arch/arm/crypto/sha512-glue.c

c80ae7ca372606a Ard Biesheuvel 2015-05-08  29  
c80ae7ca372606a Ard Biesheuvel 2015-05-08  30  int sha512_arm_update(struct shash_desc *desc, const u8 *data,
c80ae7ca372606a Ard Biesheuvel 2015-05-08  31  		      unsigned int len)
c80ae7ca372606a Ard Biesheuvel 2015-05-08  32  {
c80ae7ca372606a Ard Biesheuvel 2015-05-08  33  	return sha512_base_do_update(desc, data, len,
c80ae7ca372606a Ard Biesheuvel 2015-05-08 @34  		(sha512_block_fn *)sha512_block_data_order);
c80ae7ca372606a Ard Biesheuvel 2015-05-08  35  }
c80ae7ca372606a Ard Biesheuvel 2015-05-08  36  

:::::: The code at line 34 was first introduced by commit
:::::: c80ae7ca372606a3971dcdfa3420275cf17ef6b6 crypto: arm/sha512 - accelerated SHA-512 using ARM generic ASM and NEON

:::::: TO: Ard Biesheuvel <ard.biesheuvel@...aro.org>
:::::: CC: Herbert Xu <herbert@...dor.apana.org.au>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki