On 8/12/20 11:09 AM, Gao Xiang wrote:
Hi,
On Wed, Aug 12, 2020 at 09:49:38AM +0800, kernel test robot wrote:
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master
head: fb893de323e2d39f7a1f6df425703a2edbdf56ea
commit: 47e4937a4a7ca4184fd282791dfee76c6799966a erofs: move erofs out of
staging
date: 12 months ago
config: sparc64-randconfig-s032-20200812 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
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: v0.6.2-168-g9554805c-dirty
git checkout 47e4937a4a7ca4184fd282791dfee76c6799966a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@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
Again, I have no idea how to deal with that in my current
gatekeeping code.
I got these reports, but I cannot help to resolve that.
Even I don't know if that's another sparse issue (since I
only got such reports on sparc and alpha arch, but no x86
or arm64.)
https://lore.kernel.org/r/202007251532.y5a10zoo%25...@intel.com
https://lore.kernel.org/r/202007272132.1agbbo3u%25...@intel.com
https://lore.kernel.org/r/202008100408.wc6wgrac%25...@intel.com
https://lore.kernel.org/r/202008120933.yrvhhyoa%25...@intel.com
If no one can help that, could you please silence such reports.
It really makes me confusing.
Hi Gao Xiang,
Sorry for the inconvenience, we'll silence the reports on this commit.
Best Regards,
Rong Chen
Thanks,
Gao Xiang
:::::: The code at line 161 was first introduced by commit
:::::: a12ee2349312d7112b9b7c6ac2e70c5ec2ca334e arch/sparc: Introduce
cmpxchg_u8 SPARC
:::::: TO: Babu Moger <babu.mo...@oracle.com>
:::::: CC: David S. Miller <da...@davemloft.net>
---
0-DAY CI Kernel Test Service, Intel Corporation
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