On Fri, Oct 24, 2014 at 10:02:15AM +0000, David Laight wrote:
> From: Michael S. Tsirkin
>
> > Too many places poke at [rs]q->vq->vdev->priv just to get
> > the the vi structure. Let's just pass the pointer around: seems
> > cleaner, and might even be faster.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
> > ---
> > drivers/net/virtio_net.c | 36 +++++++++++++++++++-----------------
> > 1 file changed, 19 insertions(+), 17 deletions(-)
> >
> > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> > index 57cbc7d..36f3dfc 100644
> > --- a/drivers/net/virtio_net.c
> > +++ b/drivers/net/virtio_net.c
> ...
> > static struct sk_buff *receive_big(struct net_device *dev,
> > + struct virtnet_info *vi,
>
> Do you need to pass 'dev' here?
> Looks like it is obtainable from vi->dev (as below).
>
> David
>
> > struct receive_queue *rq,
> > void *buf,
> > unsigned int len)
> > {
> > struct page *page = buf;
> > - struct sk_buff *skb = page_to_skb(rq, page, 0, len, PAGE_SIZE);
> > + struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE);
> ...
> > -static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
> > +static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
> > + void *buf, unsigned int len)
> > {
> > - struct virtnet_info *vi = rq->vq->vdev->priv;
> > struct net_device *dev = vi->dev;
> ...
It's a matter of style, isn't it?
We have dev to hand, it seems cleaner to just pass it around.
--
MST
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