> > > Is there an interface where 2.6 might be telling library code to use system calls
> > > instead LL/SC, where the 2.4 kernel didn't?
> >
> > No.
>
> And I think it's not really worth it. MIPS II did introduce ll/sc in
> 1991 and it was becoming widely available with MIPS III and some pseudo-
> MIPS II R3000 variants also in the embedded markets and MIPS32/MIPS64
> were based on that. So ll/sc-less processors are a very small part of
> the market of Linux/MIPS these days, not really worth to optimize for.
Hmm. I can think of at least one *very* high volume MIPS Linux platform still
manufactured by a very large Japanese electronics company where LL/SC
either isn't implemented or doesn't work...
Regards,
Kevin K.
