paiext_cb
kfree(mp->mapptr->paiext_cb);
cpump->paiext_cb = kzalloc(PAIE1_CB_SZ, GFP_KERNEL);
(need_paiext_cb && !cpump->paiext_cb)) {
struct paiext_cb *pcb = cpump->paiext_cb;
struct paiext_cb *pcb = cpump->paiext_cb;
struct paiext_cb *paiext_cb; /* PAI extension control block area */
event->hw.config_base = offsetof(struct paiext_cb, acc);