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| author | Stanislaw Gruszka <sgruszka@redhat.com> | 2010-03-09 06:55:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-15 15:47:00 -0700 |
| commit | 0efc22f3afa5d8f070a33fea06162d7d9d518e38 (patch) | |
| tree | a4697a795999df7bfe11e89038e53664927195f9 /drivers | |
| parent | 2d99cf16f42b1979a2c498bb6d09498dbd689978 (diff) | |
| download | linux-3.10-0efc22f3afa5d8f070a33fea06162d7d9d518e38.tar.gz linux-3.10-0efc22f3afa5d8f070a33fea06162d7d9d518e38.tar.bz2 linux-3.10-0efc22f3afa5d8f070a33fea06162d7d9d518e38.zip | |
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.c | 1 |
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; |