Comment by jolmg

  * You are not expected to understand this.
  */
 if(rp->p_flag&SSWAP) {
  rp->p_flag =& ~SSWAP;
  aretu(u.u_ssav);
 }

I don't understand what `=&` is. Is that mistyping `&=` in the book? This should fail to compile, right?