linux-kernel - Re: [RFC v1 8/8] iommu: expose the function iommu_device_use_default

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Message-ID: <CACGkMEtRJ6-KRQ1qrrwC3FVBosMfYvV6Q47enoE9cE9C8MYYOg@mail.gmail.com>
Date:   Mon, 6 Nov 2023 15:26:12 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Cindy Lu <lulu@...hat.com>
Cc:     mst@...hat.com, yi.l.liu@...el.com, jgg@...dia.com,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [RFC v1 8/8] iommu: expose the function iommu_device_use_default_domain

On Sat, Nov 4, 2023 at 1:18 AM Cindy Lu <lulu@...hat.com> wrote:
>
> Expose the function iommu_device_use_default_domain() and
> iommu_device_unuse_default_domain()，
> While vdpa bind the iommufd device and detach the iommu device,
> vdpa need to call the function
> iommu_device_unuse_default_domain() to release the owner
>
> Signed-off-by: Cindy Lu <lulu@...hat.com>

This is the end of the series, who is the user then?

Thanks

> ---
>  drivers/iommu/iommu.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
> index 3bfc56df4f78..987cbf8c9a87 100644
> --- a/drivers/iommu/iommu.c
> +++ b/drivers/iommu/iommu.c
> @@ -3164,6 +3164,7 @@ int iommu_device_use_default_domain(struct device *dev)
>
>         return ret;
>  }
> +EXPORT_SYMBOL_GPL(iommu_device_use_default_domain);
>
>  /**
>   * iommu_device_unuse_default_domain() - Device driver stops handling device
> @@ -3187,6 +3188,7 @@ void iommu_device_unuse_default_domain(struct device *dev)
>         mutex_unlock(&group->mutex);
>         iommu_group_put(group);
>  }
> +EXPORT_SYMBOL_GPL(iommu_device_unuse_default_domain);
>
>  static int __iommu_group_alloc_blocking_domain(struct iommu_group *group)
>  {
> --
> 2.34.3
>