Messages in this thread | | | Date | Sun, 23 Jan 2011 22:01:19 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [cpuops cmpxchg double V2 1/4] Generic support for this_cpu_cmpxchg_double |
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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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