Messages in this thread | | | Date | Wed, 15 Aug 2007 17:42:07 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures |
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On Wed, 15 Aug 2007, Paul E. McKenney wrote:
> Seems to me that we face greater chance of confusion without the > volatile than with, particularly as compiler optimizations become > more aggressive. Yes, we could simply disable optimization, but > optimization can be quite helpful.
A volatile default would disable optimizations for atomic_read. atomic_read without volatile would allow for full optimization by the compiler. Seems that this is what one wants in many cases.
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