diff options
| author | stephen hemminger <shemminger@vyatta.com> | 2009-11-10 08:54:53 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-11 07:26:31 +0100 |
| commit | fa918602b61a71b4a9f47861b7e65c70258516c1 (patch) | |
| tree | 052575c7add697afb550a025695a221c6680a046 /net/decnet/dn_dev.c | |
| parent | s390: use RCU to walk list of network devices (diff) | |
| download | linux-fa918602b61a71b4a9f47861b7e65c70258516c1.tar.xz linux-fa918602b61a71b4a9f47861b7e65c70258516c1.zip | |
decnet: use RCU to find network devices
When showing device statistics use RCU rather than read_lock(&dev_base_lock)
Compile tested only.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/decnet/dn_dev.c')
| -rw-r--r-- | net/decnet/dn_dev.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c index d82694d930b4..b5ef237c8a74 100644 --- a/net/decnet/dn_dev.c +++ b/net/decnet/dn_dev.c @@ -856,9 +856,7 @@ int dn_dev_bind_default(__le16 *addr) dev = dn_dev_get_default(); last_chance: if (dev) { - read_lock(&dev_base_lock); rv = dn_dev_get_first(dev, addr); - read_unlock(&dev_base_lock); dev_put(dev); if (rv == 0 || dev == init_net.loopback_dev) return rv; @@ -1323,18 +1321,18 @@ static inline int is_dn_dev(struct net_device *dev) } static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) - __acquires(&dev_base_lock) + __acquires(rcu) { int i; struct net_device *dev; - read_lock(&dev_base_lock); + rcu_read_lock(); if (*pos == 0) return SEQ_START_TOKEN; i = 1; - for_each_netdev(&init_net, dev) { + for_each_netdev_rcu(&init_net, dev) { if (!is_dn_dev(dev)) continue; @@ -1355,7 +1353,7 @@ static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) if (v == SEQ_START_TOKEN) dev = net_device_entry(&init_net.dev_base_head); - for_each_netdev_continue(&init_net, dev) { + for_each_netdev_continue_rcu(&init_net, dev) { if (!is_dn_dev(dev)) continue; @@ -1366,9 +1364,9 @@ static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) } static void dn_dev_seq_stop(struct seq_file *seq, void *v) - __releases(&dev_base_lock) + __releases(rcu) { - read_unlock(&dev_base_lock); + rcu_read_unlock(); } static char *dn_type2asc(char type) |