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
