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authorstephen hemminger <shemminger@vyatta.com>2009-11-10 07:54:53 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-10 22:26:31 -0800
commitfa918602b61a71b4a9f47861b7e65c70258516c1 (patch)
tree052575c7add697afb550a025695a221c6680a046 /net/decnet/dn_dev.c
parente576b9ef41c2c1b13e0c123b6e9d0589723c68bf (diff)
downloadop-kernel-dev-fa918602b61a71b4a9f47861b7e65c70258516c1.zip
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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.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index d82694d..b5ef237 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)
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