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I don't see what prevents rmmod (unregister_all is called) while a dump
is active.
Even if we'd add rtnl lock/unlock pair to unregister_all (as done here),
thats not enough either as rtnl_lock is released right before the dump
process starts.
So this adds a refcount:
* acquire rtnl mutex
* bump refcount
* release mutex
* start the dump
... and make unregister_all remove the callbacks (no new dumps possible)
and then wait until refcount is 0.
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
019a316992