ARCMSR_CCB_BACK
if (!(ccb->ccb_state & ARCMSR_CCB_BACK)) {
if (ccb->ccb_state & ARCMSR_CCB_BACK) {
ccb->ccb_state |= ARCMSR_CCB_BACK;
ccb->ccb_state |= ARCMSR_CCB_BACK;
ccb->ccb_state |= ARCMSR_CCB_BACK;
ccb->ccb_state |= ARCMSR_CCB_BACK;
ccb->ccb_state |= ARCMSR_CCB_BACK;
ccb->ccb_state |= ARCMSR_CCB_BACK;
#define ARCMSR_CCB_CAN_BE_FREE (ARCMSR_CCB_WAIT4_FREE | ARCMSR_CCB_BACK)