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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-11-04 05:43:23 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-04 05:43:23 -0800 |
| commit | c6d14c84566d6b70ad9dc1618db0dec87cca9300 (patch) | |
| tree | 5ec75245cfda4d61e6b4506b6217f047ff4af01a /include/linux/netdevice.h | |
| parent | d0075634cf9d288988f57392a1f132d2053af961 (diff) | |
| download | lwn-c6d14c84566d6b70ad9dc1618db0dec87cca9300.tar.gz lwn-c6d14c84566d6b70ad9dc1618db0dec87cca9300.zip | |
net: Introduce for_each_netdev_rcu() iterator
Adds RCU management to the list of netdevices.
Convert some for_each_netdev() users to RCU version, if
it can avoid read_lock-ing dev_base_lock
Ie:
read_lock(&dev_base_loack);
for_each_netdev(net, dev)
some_action();
read_unlock(&dev_base_lock);
becomes :
rcu_read_lock();
for_each_netdev_rcu(net, dev)
some_action();
rcu_read_unlock();
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index bcf1083857fc..5077de028317 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1081,6 +1081,8 @@ extern rwlock_t dev_base_lock; /* Device list lock */ #define for_each_netdev(net, d) \ list_for_each_entry(d, &(net)->dev_base_head, dev_list) +#define for_each_netdev_rcu(net, d) \ + list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) #define for_each_netdev_safe(net, d, n) \ list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) #define for_each_netdev_continue(net, d) \ |