Avoid trying to mount the root device if it is an NFS device.

Addresses Debian Bug #310428

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/debian/initrd.ext3-add-journal b/debian/initrd.ext3-add-journal
index 557fc18..4def7b1 100644
--- a/debian/initrd.ext3-add-journal
+++ b/debian/initrd.ext3-add-journal
@@ -7,7 +7,7 @@
 rootdev=$(cat proc/sys/kernel/real-root-dev)
 cmdline=$(cat /proc/cmdline)
 umount -n proc
-if [ $rootdev != 256 ]; then
+if [ $rootdev != 256 -a $rootdev != 255 ]; then
     mount -nt tmpfs tmpfs /dev2
     get_device
     roottype=`/bin/e2initrd_helper -r /dev2/root2`