Re: [PATCH 12/15] fsi: occ: Get device number from FSI minor number API

[kernel test robot <lkp@intel.com>]

Hi Eddie,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.11 next-20240920]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Eddie-James/fsi-hub-Set-master-index-to-link-number-plus-one/20240918-012109
base:   linus/master
patch link:    https://lore.kernel.org/r/20240917171647.1403910-13-eajames%40linux.ibm.com
patch subject: [PATCH 12/15] fsi: occ: Get device number from FSI minor number API
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20240921/202409210200.8czVX7S4-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 8663a75fa2f31299ab8d1d90288d9df92aadee88)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240921/202409210200.8czVX7S4-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/202409210200.8czVX7S4-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/fsi/fsi-occ.c:3:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/s390/include/asm/elf.h:181:
   In file included from arch/s390/include/asm/mmu_context.h:11:
   In file included from arch/s390/include/asm/pgalloc.h:18:
   In file included from include/linux/mm.h:2237:
   include/linux/vmstat.h:503:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     503 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     504 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:510:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     510 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     511 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:517:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     517 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:523:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     523 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     524 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> drivers/fsi/fsi-occ.c:708:2: warning: void function 'occ_remove' should not return a value [-Wreturn-mismatch]
     708 |         return 0;
         |         ^      ~
   5 warnings generated.


vim +/occ_remove +708 drivers/fsi/fsi-occ.c

   689	
   690	static void occ_remove(struct platform_device *pdev)
   691	{
   692		struct occ *occ = platform_get_drvdata(pdev);
   693	
   694		misc_deregister(&occ->mdev);
   695	
   696		mutex_lock(&occ->occ_lock);
   697		kvfree(occ->buffer);
   698		occ->buffer = NULL;
   699		mutex_unlock(&occ->occ_lock);
   700	
   701		if (occ->platform_hwmon)
   702			device_for_each_child(&pdev->dev, NULL, occ_unregister_platform_child);
   703		else
   704			device_for_each_child(&pdev->dev, NULL, occ_unregister_of_child);
   705	
   706		fsi_free_minor(occ->devt);
   707	
 > 708		return 0;
   709	}
   710	

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