linux-kernel - Re: [PATCH v3 2/5] iommu/s390: Get rid of s390_domain

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Message-ID: <YzXFseFbiwZFSx9N@nvidia.com>
Date:   Thu, 29 Sep 2022 13:20:01 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Matthew Rosato <mjrosato@...ux.ibm.com>,
        Pierre Morel <pmorel@...ux.ibm.com>, iommu@...ts.linux.dev,
        linux-s390@...r.kernel.org, borntraeger@...ux.ibm.com,
        hca@...ux.ibm.com, gor@...ux.ibm.com,
        gerald.schaefer@...ux.ibm.com, agordeev@...ux.ibm.com,
        svens@...ux.ibm.com, joro@...tes.org, will@...nel.org,
        robin.murphy@....com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/5] iommu/s390: Get rid of s390_domain_device

On Thu, Sep 29, 2022 at 05:32:59PM +0200, Niklas Schnelle wrote:
> The struct s390_domain_device serves the sole purpose as list entry for
> the devices list of a struct s390_domain. As it contains no additional
> information besides a list_head and a pointer to the struct zpci_dev we
> can simplify things and just thread the device list through struct
> zpci_dev directly. This removes the need to allocate during domain
> attach and gets rid of one level of indirection during mapping
> operations.
> 
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
> ---
> v2->v3:
> - Remove search in devices list when we have the pointer to the
>   list item (Jason)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason