Re: [PATCH 07/14] xen: mark grant mapped pages as foreign

[Boris Ostrovsky <boris.ostrovsky@oracle.com>]

On 01/12/2015 10:43 AM, David Vrabel wrote:
> diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
> index 8d6e97c..9c7dc75 100644
> --- a/drivers/xen/grant-table.c
> +++ b/drivers/xen/grant-table.c
> @@ -679,12 +679,27 @@ EXPORT_SYMBOL_GPL(gnttab_free_auto_xlat_frames);
>    */
>   int gnttab_alloc_pages(int nr_pages, struct page **pages)
>   {
> +	int i;
>   	int ret;
>   
>   	ret = alloc_xenballooned_pages(nr_pages, pages, false);
>   	if (ret < 0)
>   		return ret;
>   
> +	for (i = 0; i < nr_pages; i++) {
> +#if BITS_PER_LONG < 64
> +		struct xen_page_foreign *foreign;
> +
> +		foreign = kzalloc(sizeof(*foreign), GFP_KERNEL);
> +		if (!foreign) {
> +			gnttab_free_pages(nr_pages, pages);
> +			return -ENOMEM;
> +		}
> +		set_page_set_private(pages[i], (unsigned long)foreign);

set_page_private() ?

-boris