From: Stanislaw Gruszka Date: Tue, 9 Mar 2010 06:55:01 +0000 (+0000) Subject: bnx2x: remove not necessary compiler barrier X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0efc22f3afa5d8f070a33fea06162d7d9d518e38;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git 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 Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c index 9fc0f6a7a5e9..ae62b67aa597 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;