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netdevice: add helper to update trans_start 

trans_start exists twice:
- as member of net_device (legacy)
- as member of netdev_queue

In order to get rid of the legacy case, add a helper for the
dev->trans_update (this patch), then convert spots that do

dev->trans_start = jiffies

to use this helper (next patch).

This would then allow us to change the helper so that it updates the
trans_stamp of netdev queue 0 instead.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2016-05-03 16:31:00 +02:00 committed by David S. Miller
parent 4d0e965732
commit ba162f8eed
1 changed files with 6 additions and 0 deletions
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6
include/linux/netdevice.h
View File

@ -3481,6 +3481,12 @@ static inline void txq_trans_update(struct netdev_queue *txq)
txq->trans_start = jiffies;
}
/* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
static inline void netif_trans_update(struct net_device *dev)
{
dev->trans_start = jiffies;
}
/**
* netif_tx_lock - grab network device transmit lock
* @dev: network device