linux-kernel - Re: [v4 2/8] iommu, x86: Define new irte structure for VT-d Posted-Interrupts

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Date:	Mon, 23 Mar 2015 12:57:54 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Feng Wu <feng.wu@...el.com>
Cc:	dwmw2@...radead.org, jiang.liu@...ux.intel.com,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [v4 2/8] iommu, x86: Define new irte structure for VT-d
 Posted-Interrupts

Hi Feng,

On Mon, Feb 02, 2015 at 04:06:58PM +0800, Feng Wu wrote:
> Add a new irte_pi structure for VT-d Posted-Interrupts.
> 
> Signed-off-by: Feng Wu <feng.wu@...el.com>
> Reviewed-by: Jiang Liu <jiang.liu@...ux.intel.com>
> Acked-by: David Woodhouse <David.Woodhouse@...el.com>
> ---
>  include/linux/dmar.h |   32 ++++++++++++++++++++++++++++++++
>  1 files changed, 32 insertions(+), 0 deletions(-)
> 
> diff --git a/include/linux/dmar.h b/include/linux/dmar.h
> index 8473756..c7f9cda 100644
> --- a/include/linux/dmar.h
> +++ b/include/linux/dmar.h
> @@ -212,6 +212,38 @@ struct irte {
>  	};
>  };
>  
> +struct irte_pi {

I think it is better to put this as a union into struct irte. It saves
memory and unnecessary casting in later patches.


	Joerg

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