Re: [PATCH] FRV: Wire up new syscalls

[Ingo Molnar]

* David Howells <dhowells@xxxxxxxxxx> wrote:

> Paul Mackerras <paulus@xxxxxxxxx> wrote:
> 
> > I did a generic implementation using irq disable on UP and 
> > hashed spin-locks on SMP.  See 09d4e0ed for the implementation
> 
> I can do better than that on FRV.  FRV has load/store-double 
> instructions that I can use to atomically load/store 64-bit memory 
> locations by using paired registers for the data.

Yeah - still i'd suggest to just go with the generic code initially, 
as then 'perf' output itself can be used to verify whether the FRV 
atomic64_t implementation is correct.

	Ingo
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