Re: [openib-general] Re: [git patch review 1/4] IPoIB: Don't startsend-only joins while multicast thread is stopped

[Roland Dreier]

    Michael> Basically, its as Andrew said: the lock around clear_bit
    Michael> is there to ensure that ipoib_mcast_send isnt running
    Michael> already when we stop the thread.  Thats why test_bit has
    Michael> to be inside the lock, too.

Makes sense I guess.  If I'm understanding correctly, the lock isn't
really there to serialize the bit ops, but rather to make sure
ipoib_mcast_send() won't do anything after we clear the bit.

Does that mean that there's no reason to take the lock around the set_bit()?

 - R.
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