linux-kernel - Re: Re: [PATCH v7 01/12] iova: Export alloc_iova

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Date:   Wed, 26 May 2021 10:43:33 +0800
From:   Yongji Xie <xieyongji@...edance.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Parav Pandit <parav@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Christian Brauner <christian.brauner@...onical.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Jens Axboe <axboe@...nel.dk>, bcrl@...ck.org,
        Jonathan Corbet <corbet@....net>,
        Mika Penttilä <mika.penttila@...tfour.com>,
        Dan Carpenter <dan.carpenter@...cle.com>, joro@...tes.org,
        virtualization <virtualization@...ts.linux-foundation.org>,
        netdev@...r.kernel.org, kvm <kvm@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Re: [PATCH v7 01/12] iova: Export alloc_iova_fast()

On Wed, May 26, 2021 at 10:36 AM Jason Wang <jasowang@...hat.com> wrote:
>
>
> 在 2021/5/17 下午5:55, Xie Yongji 写道:
> > Export alloc_iova_fast() so that some modules can use it
> > to improve iova allocation efficiency.
> >
> > Signed-off-by: Xie Yongji <xieyongji@...edance.com>
> > ---
> >   drivers/iommu/iova.c | 1 +
> >   1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
> > index e6e2fa85271c..317eef64ffef 100644
> > --- a/drivers/iommu/iova.c
> > +++ b/drivers/iommu/iova.c
> > @@ -450,6 +450,7 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size,
> >
> >       return new_iova->pfn_lo;
> >   }
> > +EXPORT_SYMBOL_GPL(alloc_iova_fast);
> >
> >   /**
> >    * free_iova_fast - free iova pfn range into rcache
>
>
> Interesting, do we need export free_iova_fast() as well?
>

Oh, yes. I missed this commit 6e1ea50a06 ("iommu: Stop exporting
free_iova_fast()"). Will rebase on the newest kernel tree.

Thanks,
Yongji