Messages in this thread | | | Date | Thu, 26 Aug 2021 02:58:47 +0800 | From | kernel test robot <> | Subject | [dhowells-fs:netfs-folio-regions 17/33] fs/netfs/write_helper.c:25:26: warning: comparison of distinct pointer types ('typeof (((1UL) << (12)) - offset) *' (aka 'unsigned long *') and 'typeof (size) *' (aka 'unsigned int *')) |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-folio-regions head: bee78a1e3c9ae86d025b0b8f44c2553228fd9d2c commit: 3ef8de77f6481b47212b87940b5f541339eb49fa [17/33] netfs: Keep lists of pending, active, dirty and flushed regions config: riscv-randconfig-c006-20210825 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project ea08c4cd1c0869ec5024a8bb3f5cdf06ab03ae83) 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://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=3ef8de77f6481b47212b87940b5f541339eb49fa git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git git fetch --no-tags dhowells-fs netfs-folio-regions git checkout 3ef8de77f6481b47212b87940b5f541339eb49fa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
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:25:26: 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))) ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ 1 warning generated.
vim +25 fs/netfs/write_helper.c
15 16 static size_t copy_folio_from_iter_atomic(struct folio *folio, 17 unsigned int offset, size_t size, 18 struct iov_iter *i) 19 { 20 size_t copied = 0, n; 21 22 do { 23 unsigned int index = offset / PAGE_SIZE; 24 unsigned int poffset = offset % PAGE_SIZE; > 25 unsigned int psize = min(PAGE_SIZE - offset, size); 26 27 n = copy_page_from_iter_atomic(folio_file_page(folio, index), 28 poffset, psize, i); 29 copied += n; 30 if (n < psize) 31 break; 32 size -= n; 33 } while (size); 34 return copied; 35 } 36
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