Messages in this thread |  | | Date | Mon, 10 Aug 2020 04:51:17 +0800 | From | kernel test robot <> | Subject | arch/sparc/include/asm/cmpxchg_64.h:161:50: sparse: sparse: cast truncates bits from constant value (5f0ecafe becomes fe) |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 06a81c1c7db9bd5de0bd38cd5acc44bb22b99150 commit: 47e4937a4a7ca4184fd282791dfee76c6799966a erofs: move erofs out of staging date: 12 months ago config: sparc64-randconfig-s032-20200810 (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: v0.6.2-118-ge1578773-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 <lkp@intel.com>
sparse warnings: (new ones prefixed by >>)
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:161:50: 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>
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