DRM_MM_NODE_ALLOCATED_BIT
__set_bit(DRM_MM_NODE_ALLOCATED_BIT, &node->flags);
__set_bit(DRM_MM_NODE_ALLOCATED_BIT, &node->flags);
clear_bit_unlock(DRM_MM_NODE_ALLOCATED_BIT, &node->flags);
return test_bit(DRM_MM_NODE_ALLOCATED_BIT, &node->flags);