mtree_alloc_range
rc = mtree_alloc_range(&ictx->mt_mmap, &startp, immap, immap->length,
int mtree_alloc_range(struct maple_tree *mt, unsigned long *startp,
EXPORT_SYMBOL(mtree_alloc_range);
ret = mtree_alloc_range(mt, &result, ptr, size, start, end,