linux-kernel - Re: [PATCH v2 02/10] iommu: Remove guest pasid related interfaces and definitions

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Message-ID: <20220209132954.GT4160@nvidia.com>
Date:   Wed, 9 Feb 2022 09:29:54 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     Joerg Roedel <joro@...tes.org>,
        Christoph Hellwig <hch@...radead.org>,
        Ben Skeggs <bskeggs@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Eric Auger <eric.auger@...hat.com>,
        Liu Yi L <yi.l.liu@...el.com>,
        Jacob jun Pan <jacob.jun.pan@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2 02/10] iommu: Remove guest pasid related interfaces
 and definitions

On Tue, Feb 08, 2022 at 09:25:51AM +0800, Lu Baolu wrote:
> The guest pasid related uapi interfaces and definitions are not referenced
> anywhere in the tree. We've also reached a consensus to replace them with
> a new iommufd design. Remove them to avoid dead code.
> 
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
> Reviewed-by: Christoph Hellwig <hch@....de>
> ---
>  include/linux/iommu.h      |  44 --------
>  include/uapi/linux/iommu.h | 181 --------------------------------
>  drivers/iommu/iommu.c      | 210 -------------------------------------
>  3 files changed, 435 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
 
> diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h
> index 59178fc229ca..65d8b0234f69 100644
> --- a/include/uapi/linux/iommu.h
> +++ b/include/uapi/linux/iommu.h
> @@ -158,185 +158,4 @@ struct iommu_page_response {
>  	__u32	code;
>  };

What is the plan for the rest of the dead code in this file?

Jason