diff --git a/sys/miscfs/kernfs/kernfs.h b/sys/miscfs/kernfs/kernfs.h
index 9f826d29cb5..2f0bb269878 100644
--- a/sys/miscfs/kernfs/kernfs.h
+++ b/sys/miscfs/kernfs/kernfs.h
@@ -52,5 +52,4 @@ struct kernfs_node {
 #define	VTOKERN(vp) ((struct kernfs_node *)(vp)->v_data)
 
 extern vop_t **kernfs_vnodeop_p;
-extern dev_t rrootdev;
 #endif /* _KERNEL */
diff --git a/sys/miscfs/kernfs/kernfs_vfsops.c b/sys/miscfs/kernfs/kernfs_vfsops.c
index e55c540ad54..94c4d1f6987 100644
--- a/sys/miscfs/kernfs/kernfs_vfsops.c
+++ b/sys/miscfs/kernfs/kernfs_vfsops.c
@@ -54,9 +54,6 @@
 
 static MALLOC_DEFINE(M_KERNFSMNT, "KERNFS mount", "KERNFS mount structure");
 
-dev_t rrootdev = NODEV;
-
-static void	kernfs_get_rrootdev __P((void));
 static int	kernfs_mount __P((struct mount *mp, char *path, caddr_t data,
 				  struct nameidata *ndp, struct proc *p));
 static int	kernfs_unmount __P((struct mount *mp, int mntflags,
@@ -65,26 +62,6 @@ static int	kernfs_root __P((struct mount *mp, struct vnode **vpp));
 static int	kernfs_statfs __P((struct mount *mp, struct statfs *sbp,
 				   struct proc *p));
 
-static void
-kernfs_get_rrootdev()
-{
-	static int tried = 0;
-	struct cdevsw *sw;
-
-	if (tried) {
-		/* Already did it once. */
-		return;
-	}
-	tried = 1;
-
-	sw = devsw(rootdev);
-	if (!sw)
-		return;
-	if (rootdev == NODEV)
-		return;
-	rrootdev = makedev(sw->d_maj, minor(rootdev));
-}
-
 /*
  * Mount the Kernel params filesystem
  */
@@ -139,7 +116,6 @@ kernfs_mount(mp, path, data, ndp, p)
 	printf("kernfs_mount: at %s\n", mp->mnt_stat.f_mntonname);
 #endif
 
-	kernfs_get_rrootdev();
 	return (0);
 }