Re: [cpuops cmpxchg double V2 1/4] Generic support for this_cpu_cmpxchg_double

[H. Peter Anvin]

On 01/21/2011 09:19 AM, Tejun Heo wrote:
> On Fri, Jan 21, 2011 at 09:13:41AM -0800, H. Peter Anvin wrote:
> > We could do cmpxchg with a structure... the problem with a lon int
> > type is that Cristoph ran into bugs with __int128 on 64 bits.
>
> But, IIRC, the problem with int128 was with passing it as parameter
> and return value.  We don't have to do that.  We'll be just using it
> as a data storage / container type.  Or even that is broken?

Well, part of the point was to pass in registers.

No idea on the data storage type.

	-hpa
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