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OpenCloudOS-Kernel
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driver: ipvlan: Free ipvl_port directly with kfree instead of kfree_rcu 

There are two functions which would free the ipvl_port now. The first
is ipvlan_port_create. It frees the ipvl_port in the error handler,
so it could kfree it directly. The second is ipvlan_port_destroy. It
invokes netdev_rx_handler_unregister which enforces one grace period
by synchronize_net firstly, so it also could kfree the ipvl_port
directly and safely.

So it is unnecessary to use kfree_rcu to free ipvl_port.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gao Feng 2016-12-07 08:44:47 +08:00 committed by David S. Miller
parent ef0915cacd
commit 48140a210b
2 changed files with 2 additions and 3 deletions
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1
drivers/net/ipvlan/ipvlan.h
View File

@ -97,7 +97,6 @@ struct ipvl_port {
struct work_struct wq;
struct sk_buff_head backlog;
int count;
struct rcu_head rcu;
};
static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)

4
drivers/net/ipvlan/ipvlan_main.c
View File

@ -128,7 +128,7 @@ static int ipvlan_port_create(struct net_device *dev)
return 0;
err:
kfree_rcu(port, rcu);
kfree(port);
return err;
}
@ -145,7 +145,7 @@ static void ipvlan_port_destroy(struct net_device *dev)
netdev_rx_handler_unregister(dev);
cancel_work_sync(&port->wq);
__skb_queue_purge(&port->backlog);
kfree_rcu(port, rcu);
kfree(port);
}
#define IPVLAN_FEATURES \