)  if err != nil {   return  }  _, _, e0 := Syscall0(SYS_KEYCTL, uintptr(cmd), uintptr(arg0), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p0)), 0, 0)  if e0 != 0 {   err = errnoErr(e0)  }  return }  // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT  func keyctlRestrictKeyring