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| author | Ben Hutchings <bhutchings@solarflare.com> | 2010-07-09 13:11:52 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-07-10 04:41:56 +0400 |
| commit | 3cfde79c6c7c8002375c4a8e5be7f602fbb9675d (patch) | |
| tree | 53fe969e9f8bb45531c1e84c82e822ff47ea015c /drivers/net/macvlan.c | |
| parent | cc7b86c1a8f207c8aa77aad6941475d8294a83c4 (diff) | |
| download | linux-3cfde79c6c7c8002375c4a8e5be7f602fbb9675d.tar.xz | |
net: Get rid of rtnl_link_stats64 / net_device_stats union
In commit be1f3c2c027cc5ad735df6a45a542ed1db7ec48b "net: Enable 64-bit
net device statistics on 32-bit architectures" I redefined struct
net_device_stats so that it could be used in a union with struct
rtnl_link_stats64, avoiding the need for explicit copying or
conversion between the two. However, this is unsafe because there is
no locking required and no lock consistently held around calls to
dev_get_stats() and use of the statistics structure it returns.
In commit 28172739f0a276eb8d6ca917b3974c2edb036da3 "net: fix 64 bit
counters on 32 bit arches" Eric Dumazet dealt with that problem by
requiring callers of dev_get_stats() to provide storage for the
result. This means that the net_device::stats64 field and the padding
in struct net_device_stats are now redundant, so remove them.
Update the comment on net_device_ops::ndo_get_stats64 to reflect its
new usage.
Change dev_txq_stats_fold() to use struct rtnl_link_stats64, since
that is what all its callers are really using and it is no longer
going to be compatible with struct net_device_stats.
Eric Dumazet suggested the separate function for the structure
conversion.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macvlan.c')
| -rw-r--r-- | drivers/net/macvlan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 6112f1498940..1b28aaec0a5a 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -436,7 +436,7 @@ static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, { struct macvlan_dev *vlan = netdev_priv(dev); - dev_txq_stats_fold(dev, (struct net_device_stats *)stats); + dev_txq_stats_fold(dev, stats); if (vlan->rx_stats) { struct macvlan_rx_stats *p, accum = {0}; |