jrecord_undo_file
jrecord_undo_file(jrec, ap->a_vp, JRUNDO_XXX, 0, 0);
jrecord_undo_file(jrec, vp, jrflags, off, bytes);
static void jrecord_undo_file(struct jrecord *jrec, struct vnode *vp,
jrecord_undo_file(jrec, ap->a_vp, JRUNDO_XXX, 0, 0);