On Tue, Jun 15, 2010 at 06:08:20PM +0200, Richard Cochran wrote:

+static inline void skb_tx_timetamp(struct phy_device *phy, struct sk_buff *skb)
+{
+	union skb_shared_tx *shtx = skb_tx(skb);
+
+	if (shtx->hardware && phy && phy->drv->txtstamp)
+		phy->drv->txtstamp(phy, skb);
+
+	if (shtx->software && !shtx->in_progress)
+		skb_tstamp_tx(skb, NULL);
+}

I forgot to mention this patch also provides a way to fix the broken
software timestamp fallback mode of the SO_TIMESTAMPING API.

We would have to add this inline call to every MAC driver in an
appropriate spot within the hard_xmit function. It is not too pretty,
but providing this as a compile time option will promote
standardization of the SO_TIMESTAMPING API for applications.

Richard