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Date:   Fri, 17 Nov 2023 16:53:11 +0800
From:   kernel test robot <yujie.liu@intel.com>
To:     Chris Morgan <macromorgan@hotmail.com>
CC:     <oe-kbuild-all@lists.linux.dev>, <linux-kernel@vger.kernel.org>,
        "Dmitry Torokhov" <dmitry.torokhov@gmail.com>
Subject: include/asm-generic/unaligned.h:119:16: sparse: sparse: cast
 truncates bits from constant value (aa01a0 becomes a0)
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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c42d9eeef8e5ba9292eda36fd8e3c11f35ee065c
commit: 66603243f5283f7f28c795f09e7c2167233df0bd Input: add driver for Hynitron cstxxx touchscreens
config: x86_64-randconfig-x001-20230717 (https://download.01.org/0day-ci/archive/20231116/202311160124.gAKUkd4c-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231116/202311160124.gAKUkd4c-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 <yujie.liu@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311160124.gAKUkd4c-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/input/touchscreen/hynitron_cstxxx.c: note: in included file (through arch/x86/include/generated/asm/unaligned.h):
>> include/asm-generic/unaligned.h:119:16: sparse: sparse: cast truncates bits from constant value (aa01a0 becomes a0)
   include/asm-generic/unaligned.h:120:20: sparse: sparse: cast truncates bits from constant value (aa01 becomes 1)
>> include/asm-generic/unaligned.h:119:16: sparse: sparse: cast truncates bits from constant value (ab00d0 becomes d0)
   include/asm-generic/unaligned.h:120:20: sparse: sparse: cast truncates bits from constant value (ab00 becomes 0)

vim +119 include/asm-generic/unaligned.h

803f4e1eab7a89 Arnd Bergmann 2021-05-08  116  
803f4e1eab7a89 Arnd Bergmann 2021-05-08  117  static inline void __put_unaligned_le24(const u32 val, u8 *p)
803f4e1eab7a89 Arnd Bergmann 2021-05-08  118  {
803f4e1eab7a89 Arnd Bergmann 2021-05-08 @119  	*p++ = val;
803f4e1eab7a89 Arnd Bergmann 2021-05-08  120  	*p++ = val >> 8;
803f4e1eab7a89 Arnd Bergmann 2021-05-08  121  	*p++ = val >> 16;
803f4e1eab7a89 Arnd Bergmann 2021-05-08  122  }
803f4e1eab7a89 Arnd Bergmann 2021-05-08  123  

:::::: The code at line 119 was first introduced by commit
:::::: 803f4e1eab7a8938ba3a3c30dd4eb5e9eeef5e63 asm-generic: simplify asm/unaligned.h

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