sk_rx_desc
struct sk_rx_desc *cur_desc;
(nexti * sizeof(struct sk_rx_desc));
struct sk_rx_desc *r;
struct sk_rx_desc *r;
#define SK_RX_RING_SIZE (sizeof(struct sk_rx_desc) * SK_RX_RING_CNT)
struct sk_rx_desc *sk_rx_ring;