NAPI_STATE_PREFER_BUSY_POLL
NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL),
return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state);
set_bit(NAPI_STATE_PREFER_BUSY_POLL, &napi->state);
set_bit(NAPI_STATE_PREFER_BUSY_POLL, &napi->state);
clear_bit(NAPI_STATE_PREFER_BUSY_POLL, &napi->state);