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Date: Thu, 28 Jul 2022 10:36:28 +0800
From: Jason Wang <jasowang@...hat.com>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Cc: Richard Weinberger <richard@....at>,
Anton Ivanov <anton.ivanov@...bridgegreys.com>,
Johannes Berg <johannes@...solutions.net>,
"Michael S. Tsirkin" <mst@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Hans de Goede <hdegoede@...hat.com>,
Mark Gross <markgross@...nel.org>,
Vadim Pasternak <vadimp@...dia.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Cornelia Huck <cohuck@...hat.com>,
Halil Pasic <pasic@...ux.ibm.com>,
Eric Farman <farman@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Alexander Gordeev <agordeev@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Vincent Whitchurch <vincent.whitchurch@...s.com>,
linux-um@...ts.infradead.org, netdev <netdev@...r.kernel.org>,
platform-driver-x86@...r.kernel.org,
linux-remoteproc@...r.kernel.org, linux-s390@...r.kernel.org,
kvm <kvm@...r.kernel.org>,
"open list:XDP (eXpress Data Path)" <bpf@...r.kernel.org>,
Kangjie Xu <kangjie.xu@...ux.alibaba.com>,
virtualization <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH v13 07/42] virtio_ring: split: stop __vring_new_virtqueue
as export symbol
On Wed, Jul 27, 2022 at 3:36 PM Xuan Zhuo <xuanzhuo@...ux.alibaba.com> wrote:
>
> On Wed, 27 Jul 2022 10:58:05 +0800, Jason Wang <jasowang@...hat.com> wrote:
> >
> > 在 2022/7/26 15:21, Xuan Zhuo 写道:
> > > There is currently only one place to reference __vring_new_virtqueue()
> > > directly from the outside of virtio core. And here vring_new_virtqueue()
> > > can be used instead.
> > >
> > > Subsequent patches will modify __vring_new_virtqueue, so stop it as an
> > > export symbol for now.
> > >
> > > Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
> > > ---
> > > drivers/virtio/virtio_ring.c | 25 ++++++++++++++++---------
> > > include/linux/virtio_ring.h | 10 ----------
> > > tools/virtio/virtio_test.c | 4 ++--
> > > 3 files changed, 18 insertions(+), 21 deletions(-)
> > >
> > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> > > index 0ad35eca0d39..4e54ed7ee7fb 100644
> > > --- a/drivers/virtio/virtio_ring.c
> > > +++ b/drivers/virtio/virtio_ring.c
> > > @@ -204,6 +204,14 @@ struct vring_virtqueue {
> > > #endif
> > > };
> > >
> > > +static struct virtqueue *__vring_new_virtqueue(unsigned int index,
> > > + struct vring vring,
> > > + struct virtio_device *vdev,
> > > + bool weak_barriers,
> > > + bool context,
> > > + bool (*notify)(struct virtqueue *),
> > > + void (*callback)(struct virtqueue *),
> > > + const char *name);
> > >
> > > /*
> > > * Helpers.
> > > @@ -2197,14 +2205,14 @@ irqreturn_t vring_interrupt(int irq, void *_vq)
> > > EXPORT_SYMBOL_GPL(vring_interrupt);
> > >
> > > /* Only available for split ring */
> > > -struct virtqueue *__vring_new_virtqueue(unsigned int index,
> > > - struct vring vring,
> > > - struct virtio_device *vdev,
> > > - bool weak_barriers,
> > > - bool context,
> > > - bool (*notify)(struct virtqueue *),
> > > - void (*callback)(struct virtqueue *),
> > > - const char *name)
> > > +static struct virtqueue *__vring_new_virtqueue(unsigned int index,
> > > + struct vring vring,
> > > + struct virtio_device *vdev,
> > > + bool weak_barriers,
> > > + bool context,
> > > + bool (*notify)(struct virtqueue *),
> > > + void (*callback)(struct virtqueue *),
> > > + const char *name)
> > > {
> > > struct vring_virtqueue *vq;
> > >
> > > @@ -2272,7 +2280,6 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index,
> > > kfree(vq);
> > > return NULL;
> > > }
> > > -EXPORT_SYMBOL_GPL(__vring_new_virtqueue);
> > >
> > > struct virtqueue *vring_create_virtqueue(
> > > unsigned int index,
> > > diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
> > > index b485b13fa50b..8b8af1a38991 100644
> > > --- a/include/linux/virtio_ring.h
> > > +++ b/include/linux/virtio_ring.h
> > > @@ -76,16 +76,6 @@ struct virtqueue *vring_create_virtqueue(unsigned int index,
> > > void (*callback)(struct virtqueue *vq),
> > > const char *name);
> > >
> > > -/* Creates a virtqueue with a custom layout. */
> > > -struct virtqueue *__vring_new_virtqueue(unsigned int index,
> > > - struct vring vring,
> > > - struct virtio_device *vdev,
> > > - bool weak_barriers,
> > > - bool ctx,
> > > - bool (*notify)(struct virtqueue *),
> > > - void (*callback)(struct virtqueue *),
> > > - const char *name);
> > > -
> > > /*
> > > * Creates a virtqueue with a standard layout but a caller-allocated
> > > * ring.
> > > diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
> > > index 23f142af544a..86a410ddcedd 100644
> > > --- a/tools/virtio/virtio_test.c
> > > +++ b/tools/virtio/virtio_test.c
> > > @@ -102,8 +102,8 @@ static void vq_reset(struct vq_info *info, int num, struct virtio_device *vdev)
> > >
> > > memset(info->ring, 0, vring_size(num, 4096));
> > > vring_init(&info->vring, num, info->ring, 4096);
> >
> >
> > Let's remove the duplicated vring_init() here.
> >
> > With this removed:
>
> The reason I didn't delete this vring_init() is because info->vring is used
> elsewhere. So it can't be deleted directly.
Ok, so we can leave it for future refactoring.
Acked-by: Jason Wang <jasowang@...hat.com>
Thanks
>
> Thanks.
>
> >
> > Acked-by: Jason Wang <jasowang@...hat.com>
> >
> >
> > > - info->vq = __vring_new_virtqueue(info->idx, info->vring, vdev, true,
> > > - false, vq_notify, vq_callback, "test");
> > > + info->vq = vring_new_virtqueue(info->idx, num, 4096, vdev, true, false,
> > > + info->ring, vq_notify, vq_callback, "test");
> > > assert(info->vq);
> > > info->vq->priv = info;
> > > }
> >
>
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