> The problem is where we end up tangling with test_and_set_bit() emulated
> using spinlocks, and even then it's not a problem _provided_
> test_and_set_bit() doesn't attempt to modify the word if the bit was
> set.
I'm not 100% sure what is the problem there, but beware that bitops
don't provide the same semantics as spinlocks regarding memory ordering.
Ben.
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