diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-11-04 14:43:23 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-04 14:43:23 +0100 |
| commit | c6d14c84566d6b70ad9dc1618db0dec87cca9300 (patch) | |
| tree | 5ec75245cfda4d61e6b4506b6217f047ff4af01a /net/decnet/dn_route.c | |
| parent | em_meta: avoid one dev_put() (diff) | |
| download | linux-c6d14c84566d6b70ad9dc1618db0dec87cca9300.tar.xz linux-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 'net/decnet/dn_route.c')
| -rw-r--r-- | net/decnet/dn_route.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c index 57662cabaf9b..860286a3921b 100644 --- a/net/decnet/dn_route.c +++ b/net/decnet/dn_route.c @@ -908,8 +908,8 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowi *old dev_put(dev_out); goto out; } - read_lock(&dev_base_lock); - for_each_netdev(&init_net, dev) { + rcu_read_lock(); + for_each_netdev_rcu(&init_net, dev) { if (!dev->dn_ptr) continue; if (!dn_dev_islocal(dev, oldflp->fld_src)) @@ -922,7 +922,7 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowi *old dev_out = dev; break; } - read_unlock(&dev_base_lock); + rcu_read_unlock(); if (dev_out == NULL) goto out; dev_hold(dev_out); |