On Wed, Mar 21, 2018 at 12:12:00PM -0700, Florian Fainelli wrote:
> > diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> > index 5fbb9f1da7fd..223d691aa0b0 100644
> > --- a/include/linux/netdevice.h
> > +++ b/include/linux/netdevice.h
> > @@ -1943,6 +1943,7 @@ struct net_device {
> > struct netprio_map __rcu *priomap;
> > #endif
> > struct phy_device *phydev;
> > + struct mdio_device *mdiots;
>
> phy_device embedds a mdio_device, can you find a way to rework the PHY
> PTP code to utilize the phy_device's mdio instance so do not introduce
> yet another pointer in that big structure that net_device already is?
You are right in that this field is wasted space for most users.
In V2 this will be inside #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING.
Thanks,
Richard
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