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| author |   Florian Westphal <fw@strlen.de> | 2017-09-26 13:58:43 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-09-28 10:20:49 -0700 |
| commit | 4c82a95e523721637d44e0e8d879fa11fa825eec (patch) | |
| tree | 7a2cca0d9ef31ffedfaf3b3ba8f61a969694228a /net/core/rtnetlink.c | |
| parent | rtnetlink: add helpers to dump netnsid information (diff) | |
| download | linux-dev-4c82a95e523721637d44e0e8d879fa11fa825eec.tar.xz linux-dev-4c82a95e523721637d44e0e8d879fa11fa825eec.zip | |
rtnetlink: rtnl_have_link_slave_info doesn't need rtnl
it can be switched to rcu.
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/rtnetlink.c')
| -rw-r--r-- | net/core/rtnetlink.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index d524609c587c..e6955da0d58d 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -522,11 +522,15 @@ static size_t rtnl_link_get_af_size(const struct net_device *dev, static bool rtnl_have_link_slave_info(const struct net_device *dev) { struct net_device *master_dev; + bool ret = false; - master_dev = netdev_master_upper_dev_get((struct net_device *) dev); + rcu_read_lock(); + + master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); if (master_dev && master_dev->rtnl_link_ops) - return true; - return false; + ret = true; + rcu_read_unlock(); + return ret; } static int rtnl_link_slave_info_fill(struct sk_buff *skb, |