[ammarfaizi2-block:dhowells/linux-fs/netfs-maple 28/43] fs/netfs/write_helper.c:28:26: warning: comparison of distinct pointer types ('typeof (((1UL) << (12)) - offset) *' (aka 'unsigned long *') and 'typeof (size) *' (aka 'unsigned int *'))

[ammarfaizi2-block:dhowells/linux-fs/netfs-maple 28/43] fs/netfs/write_helper.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:   d40df0841e9f8de3713a19dd3f0ba283c860cb93
commit: 7de6bd1573006959937bf5d90e85f16cdec38284 [28/43] netfs: Implement buffered writes through netfs_file_write_iter()
config: riscv-randconfig-r033-20220214 (https://download.01.org/0day-ci/archive/20220216/202202160826.zdpmsgyh-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 37f422f4ac31c8b8041c6b62065263314282dab6)
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 riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/ammarfaizi2/linux-block/commit/7de6bd1573006959937bf5d90e85f16cdec38284
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-maple
        git checkout 7de6bd1573006959937bf5d90e85f16cdec38284
        # 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=riscv SHELL=/bin/bash fs/netfs/

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

All warnings (new ones prefixed by >>):

>> fs/netfs/write_helper.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/write_helper.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/write_helper.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/write_helper.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
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org