[ammarfaizi2-block:dhowells/linux-fs/netfs-maple 29/42] fs/netfs/buffered_write.c:28:26: warning: comparison of distinct pointer types ('typeof (((1UL) << 12) - offset) *' (aka 'unsigned long *') and 'typeof (size) *' (aka 'unsigned int *'))

[kernel test robot]

tree:   https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-maple
head:   5cb7f190822d09757b30cd9539e57eef72552d1f
commit: 261cd621bd0477d43de460dea6c7bf7fa81824be [29/42] netfs: Implement buffered writes through netfs_file_write_iter()
config: i386-randconfig-a015 (https://download.01.org/0day-ci/archive/20220217/202202171009.cJVDSV3U-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0bad7cb56526f2572c74449fcf97c1fcda42b41d)
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
        # https://github.com/ammarfaizi2/linux-block/commit/261cd621bd0477d43de460dea6c7bf7fa81824be
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-maple
        git checkout 261cd621bd0477d43de460dea6c7bf7fa81824be
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/netfs/

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

All warnings (new ones prefixed by >>):

>> fs/netfs/buffered_write.c:28:26: warning: comparison of distinct pointer types ('typeof (((1UL) << 12) - offset) *' (aka 'unsigned long *') and 'typeof (size) *' (aka 'unsigned int *')) [-Wcompare-distinct-pointer-types]
                   unsigned int psize   = min(PAGE_SIZE - offset, size);
                                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:45:19: note: expanded from macro 'min'
   #define min(x, y)       __careful_cmp(x, y, <)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
   fs/netfs/buffered_write.c:95:18: warning: comparison of distinct pointer types ('typeof (target->from) *' (aka 'unsigned long long *') and 'typeof (folio_pos(folio) + offset) *' (aka 'long long *')) [-Wcompare-distinct-pointer-types]
           target->from  = min(target->from, folio_pos(folio) + offset);
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:45:19: note: expanded from macro 'min'
   #define min(x, y)       __careful_cmp(x, y, <)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
   fs/netfs/buffered_write.c:96:18: warning: comparison of distinct pointer types ('typeof (target->to) *' (aka 'unsigned long long *') and 'typeof (folio_pos(folio) + offset + len) *' (aka 'long long *')) [-Wcompare-distinct-pointer-types]
           target->to    = max(target->to,   folio_pos(folio) + offset + len);
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:52:19: note: expanded from macro 'max'
   #define max(x, y)       __careful_cmp(x, y, >)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
   3 warnings generated.


vim +28 fs/netfs/buffered_write.c

    18	
    19	static size_t copy_folio_from_iter_atomic(struct folio *folio,
    20						  unsigned int offset, size_t size,
    21						  struct iov_iter *i)
    22	{
    23		size_t copied = 0, n;
    24	
    25		do {
    26			unsigned int index   = offset / PAGE_SIZE;
    27			unsigned int poffset = offset % PAGE_SIZE;
  > 28			unsigned int psize   = min(PAGE_SIZE - offset, size);
    29	
    30			n = copy_page_from_iter_atomic(folio_file_page(folio, index),
    31						       poffset, psize, i);
    32			copied += n;
    33			if (n < psize)
    34				break;
    35			size -= n;
    36		} while (size);
    37		return copied;
    38	}
    39	

---
0-DAY CI Kernel Test Service, Intel Corporation
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