[hare-scsi-devel:blk-namespace.v2 4/6] lib/kobject.c:125:4: error: implicit declaration of function 'kernfs_enable_init_ns_propagates'

[hare-scsi-devel:blk-namespace.v2 4/6] lib/kobject.c:125:4: error: implicit declaration of function 'kernfs_enable_init_ns_propagates'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git blk-namespace.v2
head:   292c56144bc8965fbf622e63bda66cc40deeac87
commit: 147e14e30cde27157d6794c149aa0eb10f578ff1 [4/6] kernfs: propagate devices from initial namespace
config: i386-tinyconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git/commit/?id=147e14e30cde27157d6794c149aa0eb10f578ff1
        git remote add hare-scsi-devel https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git
        git fetch --no-tags hare-scsi-devel blk-namespace.v2
        git checkout 147e14e30cde27157d6794c149aa0eb10f578ff1
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   lib/kobject.c: In function 'create_dir':
>> lib/kobject.c:125:4: error: implicit declaration of function 'kernfs_enable_init_ns_propagates' [-Werror=implicit-function-declaration]
     125 |    kernfs_enable_init_ns_propagates(kobj->sd);
         |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/kernfs_enable_init_ns_propagates +125 lib/kobject.c

    82	
    83	static int create_dir(struct kobject *kobj)
    84	{
    85		const struct kobj_type *ktype = get_ktype(kobj);
    86		const struct kobj_ns_type_operations *ops;
    87		int error;
    88	
    89		error = sysfs_create_dir_ns(kobj, kobject_namespace(kobj));
    90		if (error)
    91			return error;
    92	
    93		error = populate_dir(kobj);
    94		if (error) {
    95			sysfs_remove_dir(kobj);
    96			return error;
    97		}
    98	
    99		if (ktype) {
   100			error = sysfs_create_groups(kobj, ktype->default_groups);
   101			if (error) {
   102				sysfs_remove_dir(kobj);
   103				return error;
   104			}
   105		}
   106	
   107		/*
   108		 * @kobj->sd may be deleted by an ancestor going away.  Hold an
   109		 * extra reference so that it stays until @kobj is gone.
   110		 */
   111		sysfs_get(kobj->sd);
   112	
   113		/*
   114		 * If @kobj has ns_ops, its children need to be filtered based on
   115		 * their namespace tags.  Enable namespace support on @kobj->sd.
   116		 */
   117		ops = kobj_child_ns_ops(kobj);
   118		if (ops) {
   119			BUG_ON(ops->type <= KOBJ_NS_TYPE_NONE);
   120			BUG_ON(ops->type >= KOBJ_NS_TYPES);
   121			BUG_ON(!kobj_ns_type_registered(ops->type));
   122	
   123			sysfs_enable_ns(kobj->sd, ops->type);
   124			if (ops->initial_ns_propagates && ops->initial_ns_propagates())
 > 125				kernfs_enable_init_ns_propagates(kobj->sd);
   126		}
   127	
   128		return 0;
   129	}
   130	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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