Re: [PATCH RFC 1/2] scatterlist: add I/O variant of sg_pcopy & sg_copy

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

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CC: kbuild-all(a)lists.01.org
In-Reply-To: <20210628123411.119778-2-narmstrong@baylibre.com>
References: <20210628123411.119778-2-narmstrong@baylibre.com>
TO: Neil Armstrong <narmstrong@baylibre.com>

Hi Neil,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on linus/master]
[also build test WARNING on v5.13 next-20210628]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Neil-Armstrong/scatterlist-add-I-O-variant-of-sg_pcopy-sg_copy-and-use-them/20210628-203511
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 62fb9874f5da54fdb243003b386128037319b219
:::::: branch date: 5 hours ago
:::::: commit date: 5 hours ago
config: sparc-randconfig-s032-20210628 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/743501a6aa75533e65fbb9df89b85ec69ca27a3e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Neil-Armstrong/scatterlist-add-I-O-variant-of-sg_pcopy-sg_copy-and-use-them/20210628-203511
        git checkout 743501a6aa75533e65fbb9df89b85ec69ca27a3e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
   lib/scatterlist.c:1050:8: sparse: sparse: symbol 'sg_copy_from_io' redeclared with different type (incompatible argument 3 (different address spaces)):
>> lib/scatterlist.c:1050:8: sparse:    unsigned long extern [addressable] [toplevel] [unsigned] sg_copy_from_io( ... )
   lib/scatterlist.c: note: in included file:
   include/linux/scatterlist.h:319:8: sparse: note: previously declared as:
>> include/linux/scatterlist.h:319:8: sparse:    unsigned long extern [addressable] [toplevel] [unsigned] sg_copy_from_io( ... )

vim +1050 lib/scatterlist.c

df642cea25c90d Akinobu Mita   2013-07-08  1039  
743501a6aa7553 Neil Armstrong 2021-06-28  1040  /**
743501a6aa7553 Neil Armstrong 2021-06-28  1041   * sg_copy_from_io - Copy from an I/O mapped buffer to an SG list
743501a6aa7553 Neil Armstrong 2021-06-28  1042   * @sgl:		 The SG list
743501a6aa7553 Neil Armstrong 2021-06-28  1043   * @nents:		 Number of SG entries
743501a6aa7553 Neil Armstrong 2021-06-28  1044   * @buf:		 Where to copy from
743501a6aa7553 Neil Armstrong 2021-06-28  1045   * @buflen:		 The number of bytes to copy
743501a6aa7553 Neil Armstrong 2021-06-28  1046   *
743501a6aa7553 Neil Armstrong 2021-06-28  1047   * Returns the number of copied bytes.
743501a6aa7553 Neil Armstrong 2021-06-28  1048   *
743501a6aa7553 Neil Armstrong 2021-06-28  1049   **/
743501a6aa7553 Neil Armstrong 2021-06-28 @1050  size_t sg_copy_from_io(struct scatterlist *sgl, unsigned int nents,
743501a6aa7553 Neil Armstrong 2021-06-28  1051  		       const void *buf, size_t buflen)
743501a6aa7553 Neil Armstrong 2021-06-28  1052  {
743501a6aa7553 Neil Armstrong 2021-06-28  1053  	return sg_copy_io(sgl, nents, (void __iomem *)buf, buflen, 0, false);
743501a6aa7553 Neil Armstrong 2021-06-28  1054  }
743501a6aa7553 Neil Armstrong 2021-06-28  1055  EXPORT_SYMBOL(sg_copy_from_io);
743501a6aa7553 Neil Armstrong 2021-06-28  1056  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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