Hi leoliu-oc, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 8eaba08b2d72718a40cafe3402ab4f26b0dc62eb [3534/3534] x86/cpu/zhaoxin: Encapsulate access to global variables within functions config: arm64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251211/202512111317.lY52m2Gz-lkp@i...) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4125e73cdc6188cca4c1c72b72e2b2d85c157483) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512111317.lY52m2Gz-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512111317.lY52m2Gz-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from <built-in>:3: In file included from ././include/linux/compiler_types.h:150: ./include/linux/compiler-clang.h:33:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined] 33 | #define __SANITIZE_ADDRESS__ | ^ <built-in>:367:9: note: previous definition is here 367 | #define __SANITIZE_ADDRESS__ 1 | ^ In file included from kernel/dma/contiguous.c:48: In file included from ./include/linux/memblock.h:12: In file included from ./include/linux/mm.h:2235: ./include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 509 | item]; | ~~~~ ./include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 516 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ ./include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ ./include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 528 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ ./include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 537 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~

...

kernel/dma/contiguous.c:209:13: warning: no previous prototype for function 'is_zhaoxin_kh40000' [-Wmissing-prototypes] 209 | bool __weak is_zhaoxin_kh40000(void) | ^ kernel/dma/contiguous.c:209:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 209 | bool __weak is_zhaoxin_kh40000(void) | ^ | static 7 warnings generated.

vim +/is_zhaoxin_kh40000 +209 kernel/dma/contiguous.c 208

209 bool __weak is_zhaoxin_kh40000(void) 210 { 211 return false; 212 } 213

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