tree: git://anongit.freedesktop.org/drm-intel topic/core-for-CI
head: d0435a9b45070b945578c093dcd363b6b73a502c
commit: cbc1ad45be43de36150fd98dae644fc89a69a5a0 [2/20] lockdep: Up MAX_LOCKDEP_CHAINS
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-191-gc51a0382-dirty
git checkout cbc1ad45be43de36150fd98dae644fc89a69a5a0
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'
If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
sparse warnings: (new ones prefixed by >>)
>> kernel/locking/lockdep.c:2744:49: sparse: sparse: cast truncates bits from constant value (a0000 becomes 0)
>> kernel/locking/lockdep.c:2744:49: sparse: sparse: cast truncates bits from constant value (a0000 becomes 0)
vim +2744 kernel/locking/lockdep.c
810507fe6fd5ff Waiman Long 2020-02-06 2736
810507fe6fd5ff Waiman Long 2020-02-06 2737 static inline void init_chain_block(int offset, int next, int bucket, int size)
810507fe6fd5ff Waiman Long 2020-02-06 2738 {
810507fe6fd5ff Waiman Long 2020-02-06 2739 chain_hlocks[offset] = (next >> 16) | CHAIN_BLK_FLAG;
810507fe6fd5ff Waiman Long 2020-02-06 2740 chain_hlocks[offset + 1] = (u16)next;
810507fe6fd5ff Waiman Long 2020-02-06 2741
810507fe6fd5ff Waiman Long 2020-02-06 2742 if (size && !bucket) {
810507fe6fd5ff Waiman Long 2020-02-06 2743 chain_hlocks[offset + 2] = size >> 16;
810507fe6fd5ff Waiman Long 2020-02-06 @2744 chain_hlocks[offset + 3] = (u16)size;
810507fe6fd5ff Waiman Long 2020-02-06 2745 }
810507fe6fd5ff Waiman Long 2020-02-06 2746 }
810507fe6fd5ff Waiman Long 2020-02-06 2747
:::::: The code at line 2744 was first introduced by commit
:::::: 810507fe6fd5ff3de429121adff49523fabb643a locking/lockdep: Reuse freed chain_hlocks entries
:::::: TO: Waiman Long <longman@xxxxxxxxxx>
:::::: CC: Ingo Molnar <mingo@xxxxxxxxxx>
---
0-DAY CI Kernel Test Service, Intel Corporation
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