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authorWANG Cong <xiyou.wangcong@gmail.com>2016-12-10 08:10:59 +0300
committerDavid S. Miller <davem@davemloft.net>2016-12-11 01:25:58 +0300
commitefa172f42836477bf1ac3c9a3053140df764699c (patch)
tree88160db9443b8a36e94c65f5fc5325c4b4be77e6 /net
parent821781a9f40673c2aa0f29d9d8226ec320dff20c (diff)
downloadlinux-efa172f42836477bf1ac3c9a3053140df764699c.tar.xz
netlink: use blocking notifier
netlink_chain is called in ->release(), which is apparently a process context, so we don't have to use an atomic notifier here. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/netlink/af_netlink.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 246f29d365c0..801d474de75b 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -113,7 +113,7 @@ static atomic_t nl_table_users = ATOMIC_INIT(0);
#define nl_deref_protected(X) rcu_dereference_protected(X, lockdep_is_held(&nl_table_lock));
-static ATOMIC_NOTIFIER_HEAD(netlink_chain);
+static BLOCKING_NOTIFIER_HEAD(netlink_chain);
static DEFINE_SPINLOCK(netlink_tap_lock);
static struct list_head netlink_tap_all __read_mostly;
@@ -711,7 +711,7 @@ static int netlink_release(struct socket *sock)
.protocol = sk->sk_protocol,
.portid = nlk->portid,
};
- atomic_notifier_call_chain(&netlink_chain,
+ blocking_notifier_call_chain(&netlink_chain,
NETLINK_URELEASE, &n);
}
@@ -2504,13 +2504,13 @@ static const struct file_operations netlink_seq_fops = {
int netlink_register_notifier(struct notifier_block *nb)
{
- return atomic_notifier_chain_register(&netlink_chain, nb);
+ return blocking_notifier_chain_register(&netlink_chain, nb);
}
EXPORT_SYMBOL(netlink_register_notifier);
int netlink_unregister_notifier(struct notifier_block *nb)
{
- return atomic_notifier_chain_unregister(&netlink_chain, nb);
+ return blocking_notifier_chain_unregister(&netlink_chain, nb);
}
EXPORT_SYMBOL(netlink_unregister_notifier);