Felix Jia 8c171d6ca5 net/ipv6: avoid possible dead locking on addr_gen_mode sysctl
The addr_gen_mode variable can be accessed by both sysctl and netlink.
Repleacd rtnl_lock() with rtnl_trylock() protect the sysctl operation to
avoid the possbile dead lock.`

Signed-off-by: Felix Jia <felix.jia@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-01 10:22:48 -08:00
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