ib_dealloc_pd_user
return ib_dealloc_pd_user(pd, &attrs->driver_udata);
EXPORT_SYMBOL(ib_dealloc_pd_user);
int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata);
int ret = ib_dealloc_pd_user(pd, NULL);