kobj_unmap        575 block/genhd.c  	kobj_unmap(bdev_map, devt, range);
kobj_unmap        577 fs/char_dev.c  	kobj_unmap(cdev_map, dev, count);
kobj_unmap         16 include/linux/kobj_map.h void kobj_unmap(struct kobj_map *, dev_t, unsigned long);