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netpoll: make __netpoll_cleanup non-block

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Like the previous patch, slave_disable_netpoll() and __netpoll_cleanup()
may be called with read_lock() held too, so we should make them
non-block, by moving the cleanup and kfree() to call_rcu_bh() callbacks.

Cc: "David S. Miller" <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Amerigo Wang 2012-08-10 01:24:38 +00:00 • committed by David S. Miller
commit 38e6bc185d
5 changed files with 38 additions and 23 deletions
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6
net/bridge/br_device.c
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@ -267,11 +267,7 @@ void br_netpoll_disable(struct net_bridge_port *p)
p->np = NULL;
/* Wait for transmitting packets to finish before freeing. */
synchronize_rcu_bh();
__netpoll_cleanup(np);
kfree(np);
__netpoll_free_rcu(np);
}
#endif