kobj_map_init    1102 block/genhd.c  	bdev_map = kobj_map_init(base_probe, &block_class_lock);
kobj_map_init     666 fs/char_dev.c  	cdev_map = kobj_map_init(base_probe, &chrdevs_lock);
kobj_map_init      18 include/linux/kobj_map.h struct kobj_map *kobj_map_init(kobj_probe_t *, struct mutex *);