netxen: remove low level tx lock

o eliminate tx lock in netxen adapter struct, instead pound on netdev
  tx lock appropriately.
o remove old "concurrent transmit" code that unnecessarily drops and
  reacquires tx lock in hard_xmit_frame(), this is already serialized
  the netdev xmit lock.
o reduce scope of tx lock in tx cleanup. tx cleanup operates on
  different section of the ring than transmitting cpus and is
  guarded by producer and consumer indices. This fixes a race
  caused by rx softirq preemption on realtime kernels.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Tested-by: Vernon Mauery <mauery@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/net/netxen/netxen_nic_ethtool.c b/drivers/net/netxen/netxen_nic_ethtool.c
index 7a876f4b8db2..d324ea3bc7ba 100644
--- a/drivers/net/netxen/netxen_nic_ethtool.c
+++ b/drivers/net/netxen/netxen_nic_ethtool.c
@@ -70,9 +70,7 @@ static const struct netxen_nic_stats netxen_nic_gstrings_stats[] = {
         {"uphcong", NETXEN_NIC_STAT(stats.uphcong)},
         {"upmcong", NETXEN_NIC_STAT(stats.upmcong)},
         {"updunno", NETXEN_NIC_STAT(stats.updunno)},
-        {"skb_freed", NETXEN_NIC_STAT(stats.skbfreed)},
         {"tx_dropped", NETXEN_NIC_STAT(stats.txdropped)},
-        {"tx_null_skb", NETXEN_NIC_STAT(stats.txnullskb)},
         {"csummed", NETXEN_NIC_STAT(stats.csummed)},
         {"no_rcv", NETXEN_NIC_STAT(stats.no_rcv)},
         {"rx_bytes", NETXEN_NIC_STAT(stats.rxbytes)},