Re: [PATCH v2 -next] mm/hugetlb_cgroup: register lockdep key for cftype

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

Hi Xiu,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Xiu-Jianfeng/mm-hugetlb_cgroup-register-lockdep-key-for-cftype/20240618-152930
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20240618071922.2127289-1-xiujianfeng%40huawei.com
patch subject: [PATCH v2 -next] mm/hugetlb_cgroup: register lockdep key for cftype
config: riscv-defconfig (https://download.01.org/0day-ci/archive/20240619/202406191003.yPG3tSzS-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 78ee473784e5ef6f0b19ce4cb111fb6e4d23c6b2)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240619/202406191003.yPG3tSzS-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/202406191003.yPG3tSzS-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from mm/hugetlb_cgroup.c:20:
   In file included from include/linux/cgroup.h:25:
   In file included from include/linux/kernel_stat.h:8:
   In file included from include/linux/interrupt.h:21:
   In file included from arch/riscv/include/asm/sections.h:9:
   In file included from include/linux/mm.h:2229:
   include/linux/vmstat.h:498:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     498 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> mm/hugetlb_cgroup.c:840:30: error: no member named 'lockdep_key' in 'struct cftype'
     840 |                 lockdep_register_key(&cft->lockdep_key);
         |                                       ~~~  ^
   1 warning and 1 error generated.


vim +840 mm/hugetlb_cgroup.c

   815	
   816	static void __init
   817	hugetlb_cgroup_cfttypes_init(struct hstate *h, struct cftype *cft,
   818				     struct cftype *tmpl, int tmpl_size)
   819	{
   820		char buf[32];
   821		int i, idx = hstate_index(h);
   822	
   823		/* format the size */
   824		mem_fmt(buf, sizeof(buf), huge_page_size(h));
   825	
   826		for (i = 0; i < tmpl_size; cft++, tmpl++, i++) {
   827			*cft = *tmpl;
   828			/* rebuild the name */
   829			snprintf(cft->name, MAX_CFTYPE_NAME, "%s.%s", buf, tmpl->name);
   830			/* rebuild the private */
   831			cft->private = MEMFILE_PRIVATE(idx, tmpl->private);
   832			/* rebuild the file_offset */
   833			if (tmpl->file_offset) {
   834				unsigned int offset = tmpl->file_offset;
   835	
   836				cft->file_offset = MEMFILE_OFFSET0(offset) +
   837						   MEMFILE_FIELD_SIZE(offset) * idx;
   838			}
   839	
 > 840			lockdep_register_key(&cft->lockdep_key);
   841		}
   842	}
   843	

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