On Wed, Jul 01, 2009 at 02:36:31AM +0100, Maciej W. Rozycki 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. That's the idea since a long time. There are far less uses of CONFIG_CPU_* than there used to be historically - and usually they're a bug or at least should be considered one. Ralf
