linux-kernel - arch/arm/crypto/sha1_glue.c:34:8: warning: cast from 'void (*)(u32 *, const unsigned char *, unsigned int)' (aka 'void (*)(unsigned int *, const unsigned char *, unsigned int)') to 'sha1_block_fn *' (aka 'void (*)(struct sha1

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Date:   Fri, 4 Nov 2022 16:11:28 +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/sha1_glue.c:34:8: warning: cast from 'void (*)(u32
 *, const unsigned char *, unsigned int)' (aka 'void (*)(unsigned int *,
 const unsigned char *, unsigned int)') to 'sha1_block_fn *' (aka 'void
 (*)(struct sha1_state *, const unsigned char ...

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ee6050c8af96bba2f81e8b0793a1fc2f998fcd20
commit: 4a329fecc9aaebb27a53fa7abfa53bbc2ee42f3f crypto: Kconfig - submenus for arm and arm64
date:   2 months ago
config: arm-randconfig-r023-20221104
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 2bbafe04fe785a9469bea5a3737f8d7d3ce4aca2)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4a329fecc9aaebb27a53fa7abfa53bbc2ee42f3f
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 4a329fecc9aaebb27a53fa7abfa53bbc2ee42f3f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/crypto/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/arm/crypto/sha1_glue.c:34:8: warning: cast from 'void (*)(u32 *, const unsigned char *, unsigned int)' (aka 'void (*)(unsigned int *, const unsigned char *, unsigned int)') to 'sha1_block_fn *' (aka 'void (*)(struct sha1_state *, const unsigned char *, int)') converts to incompatible function type [-Wcast-function-type-strict]
                                      (sha1_block_fn *)sha1_block_data_order);
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm/crypto/sha1_glue.c:40:30: warning: cast from 'void (*)(u32 *, const unsigned char *, unsigned int)' (aka 'void (*)(unsigned int *, const unsigned char *, unsigned int)') to 'sha1_block_fn *' (aka 'void (*)(struct sha1_state *, const unsigned char *, int)') converts to incompatible function type [-Wcast-function-type-strict]
           sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_block_data_order);
                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm/crypto/sha1_glue.c:48:8: warning: cast from 'void (*)(u32 *, const unsigned char *, unsigned int)' (aka 'void (*)(unsigned int *, const unsigned char *, unsigned int)') to 'sha1_block_fn *' (aka 'void (*)(struct sha1_state *, const unsigned char *, int)') converts to incompatible function type [-Wcast-function-type-strict]
                               (sha1_block_fn *)sha1_block_data_order);
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   3 warnings generated.


vim +34 arch/arm/crypto/sha1_glue.c

f0be44f4fb1faee David McCullough 2012-09-07  23  
1f8673d31a999ed Jussi Kivilinna  2014-07-29  24  asmlinkage void sha1_block_data_order(u32 *digest,
f0be44f4fb1faee David McCullough 2012-09-07  25  		const unsigned char *data, unsigned int rounds);
f0be44f4fb1faee David McCullough 2012-09-07  26  
604682551aa511e Jussi Kivilinna  2014-07-29  27  int sha1_update_arm(struct shash_desc *desc, const u8 *data,
f0be44f4fb1faee David McCullough 2012-09-07  28  		    unsigned int len)
f0be44f4fb1faee David McCullough 2012-09-07  29  {
90451d6bdb787e1 Ard Biesheuvel   2015-04-09  30  	/* make sure casting to sha1_block_fn() is safe */
90451d6bdb787e1 Ard Biesheuvel   2015-04-09  31  	BUILD_BUG_ON(offsetof(struct sha1_state, state) != 0);
f0be44f4fb1faee David McCullough 2012-09-07  32  
90451d6bdb787e1 Ard Biesheuvel   2015-04-09  33  	return sha1_base_do_update(desc, data, len,
90451d6bdb787e1 Ard Biesheuvel   2015-04-09 @34  				   (sha1_block_fn *)sha1_block_data_order);
f0be44f4fb1faee David McCullough 2012-09-07  35  }
604682551aa511e Jussi Kivilinna  2014-07-29  36  EXPORT_SYMBOL_GPL(sha1_update_arm);
f0be44f4fb1faee David McCullough 2012-09-07  37  

:::::: The code at line 34 was first introduced by commit
:::::: 90451d6bdb787e1631c6ce4619221eb59562343c crypto: arm/sha1 - move SHA-1 ARM asm implementation to base layer

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

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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