mtree_dup
int mtree_dup(struct maple_tree *mt, struct maple_tree *new, gfp_t gfp);
EXPORT_SYMBOL(mtree_dup);
ret = mtree_dup(mt, &new, GFP_KERNEL);
ret = mtree_dup(mt, &new, GFP_KERNEL);
ret = mtree_dup(mt, &new, GFP_KERNEL);
ret = mtree_dup(mt, &new, GFP_KERNEL);
ret = mtree_dup(mt, &new, GFP_KERNEL);
ret = mtree_dup(mt, &new, GFP_KERNEL);
ret = mtree_dup(mt, &new, GFP_NOWAIT);
ret = mtree_dup(mt, &new, GFP_NOWAIT);