This makes clearer the implications for a given choosen
value.

Based upon patches by Bob Picco.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Bob Picco <bob.picco@oracle.com>

(cherry picked from commit e0a45e35)
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>