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authorStanislaw Gruszka <sgruszka@redhat.com>2010-03-09 06:55:01 +0000
committerDavid S. Miller <davem@davemloft.net>2010-03-15 15:47:00 -0700
commit0efc22f3afa5d8f070a33fea06162d7d9d518e38 (patch)
treea4697a795999df7bfe11e89038e53664927195f9 /drivers
parent2d99cf16f42b1979a2c498bb6d09498dbd689978 (diff)
bnx2x: remove not necessary compiler barrier
Access to fp->tx_bd_prod is protected by __netif_tx_lock, so we do not need any barrier for that. Update of fp->tx_bd_cons in bnx2x_tx_int() is not protected by lock, but barrier() nor smb_mb() in bnx2x_tx_avail() not guarantee we will see values that is written on other cpu. Ordering issues between netif_tx_stop_queue(), netif_tx_queue_stopped(), fp->tx_bd_cons = bd_cons and bnx2x_tx_avail() are already handled by smp_mb() in bnx2x_tx_int() and bnx2x_start_xmit(). Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/bnx2x_main.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 9fc0f6a7a5e..ae62b67aa59 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -893,7 +893,6 @@ static inline u16 bnx2x_tx_avail(struct bnx2x_fastpath *fp)
u16 prod;
u16 cons;
- barrier(); /* Tell compiler that prod and cons can change */
prod = fp->tx_bd_prod;
cons = fp->tx_bd_cons;