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| author | Florian Westphal <fw@strlen.de> | 2016-04-24 22:38:14 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-26 22:53:05 +0300 |
| commit | f0cdf76c103ffa34ca5ac87dcdef7edffc722cbf (patch) | |
| tree | 893afe6a3b448bfeb0dd36cae35a6ce844230852 /Documentation/networking/netdevices.txt | |
| parent | a6086a893718db07ef9e7af5624ec27cb376ef0a (diff) | |
| download | linux-f0cdf76c103ffa34ca5ac87dcdef7edffc722cbf.tar.xz | |
net: remove NETDEV_TX_LOCKED support
No more users in the tree, remove NETDEV_TX_LOCKED support.
Adds another hole in softnet_stats struct, but better than keeping
the unused collision counter around.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/netdevices.txt')
| -rw-r--r-- | Documentation/networking/netdevices.txt | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/Documentation/networking/netdevices.txt b/Documentation/networking/netdevices.txt index 0b1cf6b2a592..7fec2061a334 100644 --- a/Documentation/networking/netdevices.txt +++ b/Documentation/networking/netdevices.txt @@ -69,10 +69,9 @@ ndo_start_xmit: When the driver sets NETIF_F_LLTX in dev->features this will be called without holding netif_tx_lock. In this case the driver - has to lock by itself when needed. It is recommended to use a try lock - for this and return NETDEV_TX_LOCKED when the spin lock fails. - The locking there should also properly protect against - set_rx_mode. Note that the use of NETIF_F_LLTX is deprecated. + has to lock by itself when needed. + The locking there should also properly protect against + set_rx_mode. WARNING: use of NETIF_F_LLTX is deprecated. Don't use it for new drivers. Context: Process with BHs disabled or BH (timer), @@ -83,8 +82,6 @@ ndo_start_xmit: o NETDEV_TX_BUSY Cannot transmit packet, try later Usually a bug, means queue start/stop flow control is broken in the driver. Note: the driver must NOT put the skb in its DMA ring. - o NETDEV_TX_LOCKED Locking failed, please retry quickly. - Only valid when NETIF_F_LLTX is set. ndo_tx_timeout: Synchronization: netif_tx_lock spinlock; all TX queues frozen. |