tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dea8dcf2a9fa8cc540136a6cd885c3beece16ec3 commit: b344d6a83d01c52fddbefa6b3b4764da5b1022a0 parisc: add support for cmpxchg on u8 pointers date: 5 months ago config: parisc-randconfig-s031-20201229 (attached as .config) compiler: hppa-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: v0.6.3-184-g1b896707-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b344d6a83d01c52fddbefa6b3b4764da5b1022a0 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b344d6a83d01c52fddbefa6b3b4764da5b1022a0 # 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=parisc
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/parisc/include/asm/atomic.h, include/linux/atomic.h,
arch/parisc/include/asm/bitops.h, ...):
>> arch/parisc/include/asm/cmpxchg.h:75:61: sparse: sparse: cast truncates bits
>> from constant value (e0f510cc becomes cc)
--
fs/erofs/zdata.c: note: in included file (through
arch/parisc/include/asm/atomic.h, include/linux/atomic.h,
arch/parisc/include/asm/bitops.h, ...):
>> arch/parisc/include/asm/cmpxchg.h:75:61: sparse: sparse: cast truncates bits
>> from constant value (e0f510cc becomes cc)
arch/parisc/include/asm/cmpxchg.h:75:52: sparse: sparse: cast truncates bits
from constant value (5f0ecafe becomes fe)
arch/parisc/include/asm/cmpxchg.h:75:52: sparse: sparse: cast truncates bits
from constant value (5f0ecafe becomes fe)
arch/parisc/include/asm/cmpxchg.h:75:61: sparse: sparse: cast truncates bits
from constant value (5f0edead becomes ad)
vim +75 arch/parisc/include/asm/cmpxchg.h
64
65 /* don't worry...optimizer will get rid of most of this */
66 static inline unsigned long
67 __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_,
int size)
68 {
69 switch (size) {
70 #ifdef CONFIG_64BIT
71 case 8: return __cmpxchg_u64((u64 *)ptr, old, new_);
72 #endif
73 case 4: return __cmpxchg_u32((unsigned int *)ptr,
74 (unsigned int)old, (unsigned
int)new_);
> 75 case 1: return __cmpxchg_u8((u8 *)ptr, (u8)old, (u8)new_);
76 }
77 __cmpxchg_called_with_bad_pointer();
78 return old;
79 }
80
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
Description: application/gzip
