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authorVlad Yasevich <vyasevic@redhat.com>2013-06-26 00:04:20 +0400
committerDavid S. Miller <davem@davemloft.net>2013-06-26 03:44:56 +0400
commitac4e4af1e59e16a018527ffa58d9d3f30bb96ca9 (patch)
tree310295ae1fffa64e94f8f3d733465d652925149a /drivers/net/macvtap.c
parent441ac0fcaadc76ad09771812382345001dd2b813 (diff)
downloadlinux-ac4e4af1e59e16a018527ffa58d9d3f30bb96ca9.tar.xz
macvtap: Consistently use rcu functions
Currently macvtap uses rcu_bh functions in its user facing fuction macvtap_get_user() and macvtap_put_user(). However, its packet handlers use normal rcu as the rcu_read_lock() is taken in netif_receive_skb(). We can safely discontinue the usage or rcu with bh disabled. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macvtap.c')
-rw-r--r--drivers/net/macvtap.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index efbf2eb6ae78..d7856a8f589a 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -754,8 +754,8 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
skb_probe_transport_header(skb, ETH_HLEN);
- rcu_read_lock_bh();
- vlan = rcu_dereference_bh(q->vlan);
+ rcu_read_lock();
+ vlan = rcu_dereference(q->vlan);
/* copy skb_ubuf_info for callback when skb has no error */
if (zerocopy) {
skb_shinfo(skb)->destructor_arg = m->msg_control;
@@ -766,7 +766,7 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
macvlan_start_xmit(skb, vlan->dev);
else
kfree_skb(skb);
- rcu_read_unlock_bh();
+ rcu_read_unlock();
return total_len;
@@ -774,11 +774,11 @@ err_kfree:
kfree_skb(skb);
err:
- rcu_read_lock_bh();
- vlan = rcu_dereference_bh(q->vlan);
+ rcu_read_lock();
+ vlan = rcu_dereference(q->vlan);
if (vlan)
vlan->dev->stats.tx_dropped++;
- rcu_read_unlock_bh();
+ rcu_read_unlock();
return err;
}
@@ -854,11 +854,11 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
copied += len;
done:
- rcu_read_lock_bh();
- vlan = rcu_dereference_bh(q->vlan);
+ rcu_read_lock();
+ vlan = rcu_dereference(q->vlan);
if (vlan)
macvlan_count_rx(vlan, copied - vnet_hdr_len, ret == 0, 0);
- rcu_read_unlock_bh();
+ rcu_read_unlock();
return ret ? ret : copied;
}