[linux-next:master 3809/4499] drivers/md/persistent-data/dm-array.c:578:48: sparse: sparse: non size-preserving pointer to integer cast

* [linux-next:master 3809/4499] drivers/md/persistent-data/dm-array.c:578:48: sparse: sparse: non size-preserving pointer to integer cast
@ 2021-05-22 17:23 ` kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-05-22 17:23 UTC (permalink / raw)
  To: Joe Thornber; +Cc: kbuild-all, Linux Memory Management List, Mike Snitzer

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   8dca2cd055ffb78b37f52f0bf0bd20c249619c4d
commit: def6a7a9a7f0e7e3886fb77cf45c4a48e7e71c36 [3809/4499] dm space maps: improve performance with inc/dec on ranges of blocks
config: arm-randconfig-s031-20210522 (attached as .config)
compiler: arm-linux-gnueabi-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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=def6a7a9a7f0e7e3886fb77cf45c4a48e7e71c36
        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 def6a7a9a7f0e7e3886fb77cf45c4a48e7e71c36
        # 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__' W=1 ARCH=arm 

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 >>)
   drivers/md/persistent-data/dm-array.c:578:48: sparse: sparse: cast to restricted __le64
>> drivers/md/persistent-data/dm-array.c:578:48: sparse: sparse: non size-preserving pointer to integer cast

vim +578 drivers/md/persistent-data/dm-array.c

6513c29f44f2cc Joe Thornber 2013-03-01  566  
6513c29f44f2cc Joe Thornber 2013-03-01  567  /*
6513c29f44f2cc Joe Thornber 2013-03-01  568   * These are the value_type functions for the btree elements, which point
6513c29f44f2cc Joe Thornber 2013-03-01  569   * to array blocks.
6513c29f44f2cc Joe Thornber 2013-03-01  570   */
def6a7a9a7f0e7 Joe Thornber 2021-04-13  571  static void block_inc(void *context, const void *value, unsigned count)
6513c29f44f2cc Joe Thornber 2013-03-01  572  {
def6a7a9a7f0e7 Joe Thornber 2021-04-13  573  	const __le64 *block_le = value;
6513c29f44f2cc Joe Thornber 2013-03-01  574  	struct dm_array_info *info = context;
def6a7a9a7f0e7 Joe Thornber 2021-04-13  575  	unsigned i;
6513c29f44f2cc Joe Thornber 2013-03-01  576  
def6a7a9a7f0e7 Joe Thornber 2021-04-13  577  	for (i = 0; i < count; i++, block_le++)
6513c29f44f2cc Joe Thornber 2013-03-01 @578  		dm_tm_inc(info->btree_info.tm, le64_to_cpu(block_le));
6513c29f44f2cc Joe Thornber 2013-03-01  579  }
6513c29f44f2cc Joe Thornber 2013-03-01  580  

:::::: The code at line 578 was first introduced by commit
:::::: 6513c29f44f2cc970c0e9fecfe5a6526c3e73025 dm persistent data: add transactional array

:::::: TO: Joe Thornber <ejt@redhat.com>
:::::: CC: Alasdair G Kergon <agk@redhat.com>

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

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