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Date: Sun, 19 Jun 2011 15:31:39 +0200 From: Richard Cochran <richardcochran@...il.com> To: <netdev@...r.kernel.org> Cc: David Miller <davem@...emloft.net>, Eric Dumazet <eric.dumazet@...il.com> Subject: [PATCH 1/7] net: correct comment on where to place transmit time stamp hook. The comment for the skb_tx_timestamp() function suggests calling it just after a buffer is released to the hardware for transmission. However, for drivers that free the buffer in an ISR, this produces a race between the time stamp code and the ISR. This commit changes the comment to advise placing the call just before handing the buffer over to the hardware. Signed-off-by: Richard Cochran <richard.cochran@...cron.at> --- include/linux/skbuff.h | 3 +-- 1 files changed, 1 insertions(+), 2 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index c0a4f3a..3e54337 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2028,8 +2028,7 @@ static inline void sw_tx_timestamp(struct sk_buff *skb) * skb_tx_timestamp() - Driver hook for transmit timestamping * * Ethernet MAC Drivers should call this function in their hard_xmit() - * function as soon as possible after giving the sk_buff to the MAC - * hardware, but before freeing the sk_buff. + * function immediately before giving the sk_buff to the MAC hardware. * * @skb: A socket buffer. */ -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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