- Add a bogus vhold/vdrop around vgone() in devfs_revoke. Without this

the vnode is never recycled.  It is bogus because the reference really
   should be associated with the devfs dirent.

sys/fs/devfs/devfs_vnops.c

@@ -947,7 +947,10 @@ devfs_revoke(struct vop_revoke_args *ap)
 		}
 		dev_unlock();
 		if (vp2 != NULL) {
+			/* XXX */
+			vhold(vp2);
 			vgone(vp2);
+			vdrop(vp2);
 			continue;
 		}
 		break;