AFT_PROC
while (ringp->aft_state & AFT_PROC) {
if (!(ringp->aft_state & AFT_PROC)) {
if (!(ringp->aft_state & AFT_PROC)) {
ASSERT(!(ringp->aft_state & AFT_PROC));
ringp->aft_state |= AFT_PROC;
ringp->aft_state &= ~AFT_PROC;