Re: [PATCH 02/36] Add Cavium OCTEON files to arch/mips/include/asm/mach-cavium-octeon

[David Daney <ddaney@caviumnetworks.com>]

Ralf Baechle wrote:
> On Mon, Oct 27, 2008 at 05:02:34PM -0700, David Daney wrote:
>
> > +#ifdef CONFIG_SMP
> > +#define cpu_has_llsc           1
> > +#else
> > +/* Disable LL/SC on non SMP systems. It is faster to disable interrupts for
> > +   atomic access than a LL/SC */
> > +#define cpu_has_llsc           0
> > +#endif
> It also means the resulting kernel won't have support for futex which
> essentially means you're cut off from modern libcs.
>
> It is possible to get this to work - but nobody bothered so far; ll/sc-less
> R2000 class processors are very rare these days.  My recommendation is
> to keep cpu_has_llsc as 1 until you've fixed up the futex implementation,
> if you deciede so.
Someone should tell ip32 w/ R5000 this.  It seems that it is broken too.

This could explain why my R5000 O2 does weird things with glibc 2.8...

David Daney