sample/vfio-mdev/mbocs: Remove dma_buf_k(un)map support

	mutex_unlock(&mdev_state->ops_lock);

}

static void *mbochs_kmap_dmabuf(struct dma_buf *buf, unsigned long page_num)

{

	struct mbochs_dmabuf *dmabuf = buf->priv;

	struct page *page = dmabuf->pages[page_num];

	return kmap(page);

}

static void mbochs_kunmap_dmabuf(struct dma_buf *buf, unsigned long page_num,

				 void *vaddr)

{

	kunmap(vaddr);

}

static struct dma_buf_ops mbochs_dmabuf_ops = {

	.map_dma_buf	  = mbochs_map_dmabuf,

	.unmap_dma_buf	  = mbochs_unmap_dmabuf,

	.release	  = mbochs_release_dmabuf,

	.map		  = mbochs_kmap_dmabuf,

	.unmap		  = mbochs_kunmap_dmabuf,

	.mmap		  = mbochs_mmap_dmabuf,

};