* [ammarfaizi2-block:dhowells/linux-fs/iov-extract-3 17/17] mm/shmem.c:2731:9: warning: comparison of distinct pointer types ('typeof (size) *' (aka 'unsigned int *') and 'typeof (((1UL) << 14) - offset) *' (aka 'unsigned long *'))
@ 2023-02-14 12:56 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-02-14 12:56 UTC (permalink / raw)
To: David Howells; +Cc: llvm, oe-kbuild-all, Ammar Faizi, GNU/Weeb Mailing List
tree: https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/iov-extract-3
head: 17cd42e56c9be2df7fc5ec06c2315cab669a43b0
commit: 17cd42e56c9be2df7fc5ec06c2315cab669a43b0 [17/17] shmem, overlayfs, coda, tty, proc, kernfs, random: Fix splice-read
config: mips-randconfig-r003-20230212 (https://download.01.org/0day-ci/archive/20230214/[email protected]/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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 mips cross compiling tool for clang build
# apt-get install binutils-mipsel-linux-gnu
# https://github.com/ammarfaizi2/linux-block/commit/17cd42e56c9be2df7fc5ec06c2315cab669a43b0
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/iov-extract-3
git checkout 17cd42e56c9be2df7fc5ec06c2315cab669a43b0
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
| Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All warnings (new ones prefixed by >>):
>> mm/shmem.c:2731:9: warning: comparison of distinct pointer types ('typeof (size) *' (aka 'unsigned int *') and 'typeof (((1UL) << 14) - offset) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
size = min(size, PAGE_SIZE - offset);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:67:19: 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 +2731 mm/shmem.c
2725
2726 static size_t splice_zeropage_into_pipe(struct pipe_inode_info *pipe,
2727 loff_t fpos, size_t size)
2728 {
2729 size_t offset = fpos & ~PAGE_MASK;
2730
> 2731 size = min(size, PAGE_SIZE - offset);
2732
2733 if (!pipe_full(pipe->head, pipe->tail, pipe->max_usage)) {
2734 struct pipe_buffer *buf = pipe_head_buf(pipe);
2735
2736 *buf = (struct pipe_buffer) {
2737 .ops = &zero_pipe_buf_ops,
2738 .page = ZERO_PAGE(0),
2739 .offset = offset,
2740 .len = size,
2741 };
2742 get_page(buf->page);
2743 pipe->head++;
2744 }
2745
2746 return size;
2747 }
2748
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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2023-02-14 12:56 [ammarfaizi2-block:dhowells/linux-fs/iov-extract-3 17/17] mm/shmem.c:2731:9: warning: comparison of distinct pointer types ('typeof (size) *' (aka 'unsigned int *') and 'typeof (((1UL) << 14) - offset) *' (aka 'unsigned long *')) kernel test robot
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