diff -dru vmblock-only.orig/vfsops.c vmblock-only/vfsops.c
--- vmblock-only.orig/vfsops.c	2013-10-29 20:16:30.000000000 +0100
+++ vmblock-only/vfsops.c	2014-02-10 23:16:40.000000000 +0100
@@ -231,7 +231,7 @@
     */
    MNT_ILOCK(mp);
    mp->mnt_flag |= lowerrootvp->v_mount->mnt_flag & MNT_LOCAL;
-#if __FreeBSD_version >= 600000
+#if __FreeBSD_version >= 600000 && __FreeBSD_version < 1000021
    mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag & MNTK_MPSAFE;
 #endif
    MNT_IUNLOCK(mp);
diff -dru vmblock-only.orig/vnops.c vmblock-only/vnops.c
--- vmblock-only.orig/vnops.c	2013-10-29 20:16:30.000000000 +0100
+++ vmblock-only/vnops.c	2014-02-10 23:19:21.000000000 +0100
@@ -1365,7 +1365,6 @@
 */
 {
    struct vnode *vp = ap->a_vp;
-   struct thread *td = ap->a_td;
 
    vp->v_object = NULL;
 
@@ -1373,7 +1372,7 @@
     * If this is the last reference, then free up the vnode so as not to
     * tie up the lower vnode.
     */
-   vrecycle(vp, td);
+   vrecycle(vp);
 
    return 0;
 }