From: kernel test robot <lkp@intel.com>
To: Gao Xiang <hsiangkao@linux.alibaba.com>
Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
Yue Hu <huyue2@coolpad.com>, Chao Yu <yuchao0@huawei.com>,
Chao Yu <chao@kernel.org>
Subject: arch/sparc/include/asm/cmpxchg_64.h:161:55: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes cc)
Date: Sun, 16 Apr 2023 10:48:36 +0800 [thread overview]
Message-ID: <202304161045.XaIBg23J-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a7a55e27ad72fb0dc9281d6211cffeebef8dde65
commit: 2f44013e39984c127c6efedf70e6b5f4e9dcf315 erofs: fix pcluster use-after-free on UP platforms
date: 7 months ago
config: sparc64-randconfig-s051-20230416 (https://download.01.org/0day-ci/archive/20230416/202304161045.XaIBg23J-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2f44013e39984c127c6efedf70e6b5f4e9dcf315
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 2f44013e39984c127c6efedf70e6b5f4e9dcf315
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=sparc64 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=sparc64 SHELL=/bin/bash fs/erofs/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304161045.XaIBg23J-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
fs/erofs/utils.c: note: in included file (through arch/sparc/include/asm/cmpxchg.h, arch/sparc/include/asm/atomic_64.h, arch/sparc/include/asm/atomic.h, ...):
>> arch/sparc/include/asm/cmpxchg_64.h:161:55: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes cc)
--
fs/erofs/zdata.c: note: in included file (through arch/sparc/include/asm/cmpxchg.h, arch/sparc/include/asm/atomic_64.h, arch/sparc/include/asm/atomic.h, ...):
>> arch/sparc/include/asm/cmpxchg_64.h:161:55: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes cc)
arch/sparc/include/asm/cmpxchg_64.h:161:50: sparse: sparse: cast truncates bits from constant value (5f0ecafe becomes fe)
arch/sparc/include/asm/cmpxchg_64.h:161:50: sparse: sparse: cast truncates bits from constant value (5f0ecafe becomes fe)
arch/sparc/include/asm/cmpxchg_64.h:161:55: sparse: sparse: cast truncates bits from constant value (5f0edead becomes ad)
vim +161 arch/sparc/include/asm/cmpxchg_64.h
d550bbd40c0e10 David Howells 2012-03-28 155
d550bbd40c0e10 David Howells 2012-03-28 156 static inline unsigned long
d550bbd40c0e10 David Howells 2012-03-28 157 __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
d550bbd40c0e10 David Howells 2012-03-28 158 {
d550bbd40c0e10 David Howells 2012-03-28 159 switch (size) {
a12ee2349312d7 Babu Moger 2017-05-24 160 case 1:
a12ee2349312d7 Babu Moger 2017-05-24 @161 return __cmpxchg_u8(ptr, old, new);
d550bbd40c0e10 David Howells 2012-03-28 162 case 4:
d550bbd40c0e10 David Howells 2012-03-28 163 return __cmpxchg_u32(ptr, old, new);
d550bbd40c0e10 David Howells 2012-03-28 164 case 8:
d550bbd40c0e10 David Howells 2012-03-28 165 return __cmpxchg_u64(ptr, old, new);
d550bbd40c0e10 David Howells 2012-03-28 166 }
d550bbd40c0e10 David Howells 2012-03-28 167 __cmpxchg_called_with_bad_pointer();
d550bbd40c0e10 David Howells 2012-03-28 168 return old;
d550bbd40c0e10 David Howells 2012-03-28 169 }
d550bbd40c0e10 David Howells 2012-03-28 170
:::::: The code at line 161 was first introduced by commit
:::::: a12ee2349312d7112b9b7c6ac2e70c5ec2ca334e arch/sparc: Introduce cmpxchg_u8 SPARC
:::::: TO: Babu Moger <babu.moger@oracle.com>
:::::: CC: David S. Miller <davem@davemloft.net>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
next reply other threads:[~2023-04-16 2:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-16 2:48 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-08-12 1:49 arch/sparc/include/asm/cmpxchg_64.h:161:55: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes cc) kernel test robot
2020-08-12 3:09 ` Gao Xiang
2020-07-27 13:04 kernel test robot
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