[PATCH v13 07/42] virtio_ring: split: stop __vring_new_virtqueue as export symbol

[Xuan Zhuo]

On Wed, 27 Jul 2022 10:58:05 +0800, Jason Wang <jasowang at redhat.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 at linux.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 at redhat.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;
> >   }
>