linux-kernel - Re: [PATCH] vfio: Use filp instead of fd

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Message-ID: <YzHcX2VLh+0n2mAP@nvidia.com>
Date:   Mon, 26 Sep 2022 14:07:43 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Deming Wang <wangdeming@...pur.com>
Cc:     pbonzini@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vfio: Use filp instead of fd

On Mon, Sep 26, 2022 at 02:54:07AM -0400, Deming Wang wrote:
> The function of kvm_vfio_group_set_spapr_tce and kvm_vfio_group_del
> use fd indirectly.But,it only be used for fd.file. So,we can directly
> use the struct of file instead.
> 
> Signed-off-by: Deming Wang <wangdeming@...pur.com>
> ---
>  virt/kvm/vfio.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)

I thought about changing this too when I was looking at
this. fdget/fdput includes a tiny micro-optimization that is legal
here, however I doubt anyone cares about performance on this path.

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

Jason