[openeuler:OLK-5.10 2735/2735] arch/x86/kernel/cpu/resctrl/rdtgroup.c:1504:6: warning: variable 'h' set but not used

[openeuler:OLK-5.10 2735/2735] arch/x86/kernel/cpu/resctrl/rdtgroup.c:1504:6: warning: variable 'h' set but not used

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   d0165578d0df9962ea30fbabcf76cf41f8789d27
commit: 540e1ae2f7aca5a427a52f12bef657b1e3e81fc1 [2735/2735] x86/resctrl: Add interface to read mbm_total_bytes_config
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20250210/202502102259.fAt19b0s-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250210/202502102259.fAt19b0s-lkp@intel.com/reproduce)

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/202502102259.fAt19b0s-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/x86/kernel/cpu/resctrl/rdtgroup.c:19:
   In file included from include/linux/fs_parser.h:11:
   In file included from include/linux/fs_context.h:14:
   In file included from include/linux/security.h:33:
   In file included from include/linux/mm.h:1587:
   include/linux/vmstat.h:417:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     417 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     418 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:424:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     424 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     425 |                            NR_VM_NUMA_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:431:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     431 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:436:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     436 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     437 |                            NR_VM_NUMA_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:445:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     445 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     446 |                            NR_VM_NUMA_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~
>> arch/x86/kernel/cpu/resctrl/rdtgroup.c:1504:6: warning: variable 'h' set but not used [-Wunused-but-set-variable]
    1504 |         u32 h;
         |             ^
   6 warnings generated.


vim +/h +1504 arch/x86/kernel/cpu/resctrl/rdtgroup.c

  1499	
  1500	static void mon_event_config_read(void *info)
  1501	{
  1502		struct mon_config_info *mon_info = info;
  1503		unsigned int index;
> 1504		u32 h;
  1505	
  1506		index = mon_event_config_index_get(mon_info->evtid);
  1507		if (index == INVALID_CONFIG_INDEX) {
  1508			pr_warn_once("Invalid event id %d\n", mon_info->evtid);
  1509			return;
  1510		}
  1511		rdmsr(MSR_IA32_EVT_CFG_BASE + index, mon_info->mon_config, h);
  1512	
  1513		/* Report only the valid event configuration bits */
  1514		mon_info->mon_config &= MAX_EVT_CONFIG_BITS;
  1515	}
  1516	

-- 
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https://github.com/intel/lkp-tests/wiki