Stefan Fiedler:

package/base/sysfiles/stone_mod_setup.sh

@@ -31,6 +31,7 @@ proc /proc proc defaults 0 0
 devpts /dev/pts devpts defaults 0 0
 tmpfs /dev/shm tmpfs defaults 0 0
 sysfs /sys sysfs defaults 0 0
+/dev/bus/usb /proc/bus/usb bind bind 0 0
 #tmpfs /tmp tmpfs defaults 0 0
 EOT
 

package/base/udev/udev.conf

@@ -34,8 +34,10 @@ udev_pm() {
 	rm -f $root/lib/udev/devices/stderr
 	ln -sv /proc/self/fd/2 $root/lib/udev/devices/stderr
 	rm -rf $root/lib/udev/devices/{pts,shm}
-	mkdir -p $root/lib/udev/devices/{pts,shm}
-	mkdir -p $root/lib/udev/devices/bus/usb
+	mkdir -p $root/lib/udev/devices/{pts,shm,bus/usb}
+	# Somehow on boot-up this prevents errors like:
+	# cp: will not create hard link `/dev/pts' to directory `/dev/bus/usb'
+	touch $root/lib/udev/devices/{pts,shm,bus/usb}/.empty
 
 	cp -v $confdir/rules/* $root/etc/udev/rules.d/
 	cp -v $confdir/scripts/*.sh $root/lib/udev/