[linux-next:master 6632/7105] mm/hugetlb_cgroup.c:840:42: error: 'struct cftype' has no member named 'lockdep_key'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   2102cb0d050d34d50b9642a3a50861787527e922
commit: eb9290991cb5914c2553164f1e190a92df9fc1ff [6632/7105] mm/hugetlb_cgroup: register lockdep key for cftype
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20240620/202406200146.6cKtnILd-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240620/202406200146.6cKtnILd-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/202406200146.6cKtnILd-lkp@intel.com/

Note: the linux-next/master HEAD 2102cb0d050d34d50b9642a3a50861787527e922 builds fine.
      It may have been fixed somewhere.

All errors (new ones prefixed by >>):

   mm/hugetlb_cgroup.c: In function 'hugetlb_cgroup_cfttypes_init':
>> mm/hugetlb_cgroup.c:840:42: error: 'struct cftype' has no member named 'lockdep_key'
     840 |                 lockdep_register_key(&cft->lockdep_key);
         |                                          ^~


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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