Re: [patch][rfc] rwsem: generic rwsem

[David Howells]

Nick Piggin <npiggin@xxxxxxx> wrote:

> > Look at how the counter works in the XADD-based version.  That's the way
> > it is *because* I'm using XADD.  That's quite limiting.
> 
> Not really. ll/sc architectures "emulate" xadd the same as they would
> emulate a spinlock. There is nothing suboptimal about it.

Yes, really.  You've missed the point entirely.  Look at *how* the counter
*works*.

David
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