Stop embedding struct ifnet at the top of driver softcs. Instead the

struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
 - Struct arpcom is no longer referenced in normal interface code.
   Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
   To enforce this ac_enaddr has been renamed to _ac_enaddr.
 - The second argument to ether_ifattach is now always the mac address
   from driver private storage rather than sometimes being ac_enaddr.

Reviewed by:	sobomax, sam

1 files changed, 3 insertions, 2 deletions

diff --git a/sys/dev/cm/if_cm_isa.c b/sys/dev/cm/if_cm_isa.c
index 8f7732f..027d139 100644
--- a/sys/dev/cm/if_cm_isa.c
+++ b/sys/dev/cm/if_cm_isa.c
@@ -103,14 +103,15 @@ static int
 cm_isa_detach(device_t dev)
 {
 	struct cm_softc *sc = device_get_softc(dev);
-	struct ifnet *ifp = &sc->sc_arccom.ac_if;
+	struct ifnet *ifp = sc->sc_ifp;
 	int s;
 
 	cm_stop(sc);
 	ifp->if_flags &= ~IFF_RUNNING;
 
 	s = splimp();
-	arc_ifdetach(&sc->sc_arccom.ac_if);
+	arc_ifdetach(ifp);
+	if_free(ifp);
 	splx(s);
 
 	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);