[openib-general] Re: ipoib_mcast_send.patch

[Roland Dreier]

    Michael> Right, but I thought atomic test_and_set_bit implied
    Michael> smp_wmb already?

So did I but then I looked in the kernel source and now I think that
set_bit operations are only ordered against other bitops that touch
the same word.  For example ia64 just uses cmpxchg to implement the
bitops, and powerpc just uses locked loads and stores.

 - R.