Re: [PATCH] MIPS: Define __arch_swab64 for all mips r2 cpus (v2).

["Maciej W. Rozycki" <macro@linux-mips.org>]

On Tue, 30 Jun 2009, David Daney wrote:

> The problem with CPU_MIPS64_R2 in the kernel is that it means two unrelated
> things:
> 
> 1) The cpu can execute all mips64r2 ISA instructions.
> 
> 2) The cpu requires that all worse case cache and execution hazards are
> handled.
> 
> In the case of the Octeon processors, #1 is true, but we can get better
> performance by omitting many of the hazard barriers because they are unneeded.

 Which is why I think a split of the semantics would be a good idea.

  Maciej