ixgbe_alloc_rx_buffers_zc
ixgbe_alloc_rx_buffers_zc(ring, ixgbe_desc_unused(ring));
bool ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count);
!ixgbe_alloc_rx_buffers_zc(rx_ring,