--- linux/init/do_mounts.c.orig	2008-10-24 12:47:21.000000000 +0200
+++ linux/init/do_mounts.c	2008-10-24 12:49:05.000000000 +0200
@@ -220,10 +220,10 @@
 
 	sys_chdir("/root");
 	ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
-	printk("VFS: Mounted root (%s filesystem)%s.\n",
+	printk("VFS: Mounted root (%s filesystem)%s on device %u:%u.\n",
 	       current->fs->pwd.mnt->mnt_sb->s_type->name,
 	       current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ?
-	       " readonly" : "");
+	       " readonly" : "", MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
 	return 0;
 }