packet: use macro GET_PBDQC_FROM_RB to simplify the codes

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index ba2548bd85bf7d42b26e25ae9a2626b729fc8be9..c235da940019a450965d6777f9b478af58dee3d2 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -437,7 +437,8 @@ static void prb_shutdown_retire_blk_timer(struct packet_sock *po,
 {
        struct tpacket_kbdq_core *pkc;
 
-       pkc = tx_ring ? &po->tx_ring.prb_bdqc : &po->rx_ring.prb_bdqc;
+       pkc = tx_ring ? GET_PBDQC_FROM_RB(&po->tx_ring) :
+                       GET_PBDQC_FROM_RB(&po->rx_ring);
 
        spin_lock_bh(&rb_queue->lock);
        pkc->delete_blk_timer = 1;
@@ -463,7 +464,8 @@ static void prb_setup_retire_blk_timer(struct packet_sock *po, int tx_ring)
        if (tx_ring)
                BUG();
 
-       pkc = tx_ring ? &po->tx_ring.prb_bdqc : &po->rx_ring.prb_bdqc;
+       pkc = tx_ring ? GET_PBDQC_FROM_RB(&po->tx_ring) :
+                       GET_PBDQC_FROM_RB(&po->rx_ring);
        prb_init_blk_timer(po, pkc, prb_retire_rx_blk_timer_expired);
 }
 
@@ -521,7 +523,7 @@ static void init_prb_bdqc(struct packet_sock *po,
                        struct pgv *pg_vec,
                        union tpacket_req_u *req_u, int tx_ring)
 {
-       struct tpacket_kbdq_core *p1 = &rb->prb_bdqc;
+       struct tpacket_kbdq_core *p1 = GET_PBDQC_FROM_RB(rb);
        struct tpacket_block_desc *pbd;
 
        memset(p1, 0x0, sizeof(*p1));
@@ -585,7 +587,7 @@ static void _prb_refresh_rx_retire_blk_timer(struct tpacket_kbdq_core *pkc)
 static void prb_retire_rx_blk_timer_expired(unsigned long data)
 {
        struct packet_sock *po = (struct packet_sock *)data;
-       struct tpacket_kbdq_core *pkc = &po->rx_ring.prb_bdqc;
+       struct tpacket_kbdq_core *pkc = GET_PBDQC_FROM_RB(&po->rx_ring);
        unsigned int frozen;
        struct tpacket_block_desc *pbd;