linux-kernel - Re: [PATCH v2 17/23] xen/arm: implement alloc/free_xenballooned_pages with alloc

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Date:	Tue, 7 Aug 2012 14:31:35 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	Ian.Campbell@...rix.com, tim@....org,
	linux-arm-kernel@...ts.infradead.org, linaro-dev@...ts.linaro.org,
	catalin.marinas@....com, arnd@...db.de
Subject: Re: [PATCH v2 17/23] xen/arm: implement
 alloc/free_xenballooned_pages with alloc_pages/kfree

On Mon, Aug 06, 2012 at 03:27:20PM +0100, Stefano Stabellini wrote:
> Only until we get the balloon driver to work.

OK. Acked-by be.
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> ---
>  arch/arm/xen/enlighten.c |   18 ++++++++++++++++++
>  1 files changed, 18 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
> index 87b17f0..c244583 100644
> --- a/arch/arm/xen/enlighten.c
> +++ b/arch/arm/xen/enlighten.c
> @@ -140,3 +140,21 @@ static int __init xen_init_events(void)
>  	return 0;
>  }
>  postcore_initcall(xen_init_events);
> +
> +/* XXX: only until balloon is properly working */
> +int alloc_xenballooned_pages(int nr_pages, struct page **pages, bool highmem)
> +{
> +	*pages = alloc_pages(highmem ? GFP_HIGHUSER : GFP_KERNEL,
> +			get_order(nr_pages));
> +	if (*pages == NULL)
> +		return -ENOMEM;
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(alloc_xenballooned_pages);
> +
> +void free_xenballooned_pages(int nr_pages, struct page **pages)
> +{
> +	kfree(*pages);
> +	*pages = NULL;
> +}
> +EXPORT_SYMBOL_GPL(free_xenballooned_pages);
> -- 
> 1.7.2.5
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