Re: [patch] Performance Counters for Linux, v3

[Andi Kleen]

Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> writes:
> On that, I still don't think its a good idea to use bitfields in an ABI.
> The C std is just not strict enough on them,

If you constrain yourself to a single architecture in practice C
bitfield standards are quite good e.g. on Linux/x86 it is "everyone
implements what gcc does" (and on linux/ppc "what ppc gcc does"). 
And the syscall ABI is certainly restricted to one architecture.

-Andi

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