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Date: Wed, 27 Jul 2022 15:35:40 +0800
From: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To: Jason Wang <jasowang@...hat.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@...r.kernel.org,
platform-driver-x86@...r.kernel.org,
linux-remoteproc@...r.kernel.org, linux-s390@...r.kernel.org,
kvm@...r.kernel.org, bpf@...r.kernel.org,
kangjie.xu@...ux.alibaba.com,
virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v13 07/42] virtio_ring: split: stop __vring_new_virtqueue as export symbol
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.
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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