M_PORTSPEED
#define G_PORTSPEED(x) (((x) >> S_PORTSPEED) & M_PORTSPEED)
V_PORTSPEED(M_PORTSPEED) | F_SAFESPEEDCHANGE,
V_PORTSPEED(M_PORTSPEED), val);
if ((old & V_PORTSPEED(M_PORTSPEED)) != val) {
#define G_PORTSPEED(x) (((x) >> S_PORTSPEED) & M_PORTSPEED)