* [linux-next:master 10588/14131] drivers/block/loop.c:238:27: warning: result of comparison of constant 65536 with expression of type 'unsigned short' is always false
@ 2020-06-02 7:17 kbuild test robot
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From: kbuild test robot @ 2020-06-02 7:17 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: e7b08814b16b80a0bf76eeca16317f8c2ed23b8c
commit: 3448914e8cc550ba792d4ccc74471d1ca4293aae [10588/14131] loop: Add LOOP_CONFIGURE ioctl
config: mips-randconfig-r014-20200602 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 2388a096e7865c043e83ece4e26654bd3d1a20d5)
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-mips-linux-gnu
git checkout 3448914e8cc550ba792d4ccc74471d1ca4293aae
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips
If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>
All warnings (new ones prefixed by >>, old ones prefixed by <<):
>> drivers/block/loop.c:238:27: warning: result of comparison of constant 65536 with expression of type 'unsigned short' is always false [-Wtautological-constant-out-of-range-compare]
if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
~~~~~ ^ ~~~~~~~~~
1 warning generated.
vim +238 drivers/block/loop.c
230
231 /**
232 * loop_validate_block_size() - validates the passed in block size
233 * @bsize: size to validate
234 */
235 static int
236 loop_validate_block_size(unsigned short bsize)
237 {
> 238 if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
239 return -EINVAL;
240
241 return 0;
242 }
243
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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