ptyfs_next_active
int ptyfs_next_active(struct mount *, int);
&& ptyfs_next_active(mp, pty) != pty)
if (pty < 0 || ptyfs_next_active(dvp->v_mount, pty) != pty)
if (ptyfs_next_active(dvp->v_mount, pty) != pty) {
n = ptyfs_next_active(vp->v_mount, i - 2);