+#ifdef CONFIG_ARCH_ROCKCHIP
+ {
+ extern int ion_munmap(void *dmabuf, struct vm_area_struct *vma);
+ extern int dma_buf_is_dma_buf(struct file *file);
+ if (vma->vm_file && dma_buf_is_dma_buf(vma->vm_file)) {
+ ion_munmap(vma->vm_file->private_data, vma);
+ }
+ }
+#endif
+