hwlock_to_id
tmp = radix_tree_tag_clear(&hwspinlock_tree, hwlock_to_id(hwlock),
WARN_ON(hwlock_to_id(hwlock) != id);
ret = radix_tree_tag_get(&hwspinlock_tree, hwlock_to_id(hwlock),
tmp = radix_tree_tag_set(&hwspinlock_tree, hwlock_to_id(hwlock),
lock_id = hwlock_to_id(lock);