# grep -r 'netif_carrier_o[nf]' linux-2.6.12 | wc -l
246

# size vmlinux.org vmlinux.carrier
text    data     bss     dec     hex filename
4339634 1054414  259296 5653344  564360 vmlinux.org
4337710 1054414  259296 5651420  563bdc vmlinux.carrier

And this ain't an allyesconfig kernel!

diff -urpN linux-2.6.12.org/include/linux/netdevice.h linux-2.6.12.carrier/include/linux/netdevice.h
--- linux-2.6.12.org/include/linux/netdevice.h	Sun Jun 19 16:10:56 2005
+++ linux-2.6.12.carrier/include/linux/netdevice.h	Wed Aug 10 21:13:28 2005
@@ -706,19 +706,9 @@ static inline int netif_carrier_ok(const
 
 extern void __netdev_watchdog_up(struct net_device *dev);
 
-static inline void netif_carrier_on(struct net_device *dev)
-{
-	if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
-		linkwatch_fire_event(dev);
-	if (netif_running(dev))
-		__netdev_watchdog_up(dev);
-}
+extern void netif_carrier_on(struct net_device *dev);
 
-static inline void netif_carrier_off(struct net_device *dev)
-{
-	if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
-		linkwatch_fire_event(dev);
-}
+extern void netif_carrier_off(struct net_device *dev);
 
 /* Hot-plugging. */
 static inline int netif_device_present(struct net_device *dev)
diff -urpN linux-2.6.12.org/net/sched/sch_generic.c linux-2.6.12.carrier/net/sched/sch_generic.c
--- linux-2.6.12.org/net/sched/sch_generic.c	Wed Aug 10 21:15:26 2005
+++ linux-2.6.12.carrier/net/sched/sch_generic.c	Wed Aug 10 22:23:33 2005
@@ -238,6 +238,20 @@ static void dev_watchdog_down(struct net
 	spin_unlock_bh(&dev->xmit_lock);
 }
 
+void netif_carrier_on(struct net_device *dev)
+{
+	if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
+		linkwatch_fire_event(dev);
+	if (netif_running(dev))
+		__netdev_watchdog_up(dev);
+}
+
+void netif_carrier_off(struct net_device *dev)
+{
+	if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
+		linkwatch_fire_event(dev);
+}
+
 /* "NOOP" scheduler: the best scheduler, recommended for all interfaces
    under all circumstances. It is difficult to invent anything faster or
    cheaper.
@@ -604,6 +618,8 @@ void dev_shutdown(struct net_device *dev
 }
 
 EXPORT_SYMBOL(__netdev_watchdog_up);
+EXPORT_SYMBOL(netif_carrier_on);
+EXPORT_SYMBOL(netif_carrier_off);
 EXPORT_SYMBOL(noop_qdisc);
 EXPORT_SYMBOL(noop_qdisc_ops);
 EXPORT_SYMBOL(qdisc_create_dflt);