On Fri, 2010-03-19 at 12:08 +1100, Nick Piggin wrote:

quoted

-     ISYNC_ON_SMP
+     PPC_ACQUIRE_BARRIER

I wonder if this shouldn't be called PPC_ISYNC_ACQUIRE_BARRIER ?

Unlike PPC_RELEASE_BARRIER, it is not an acquire barrier unless it
is used like an isync.

Right. The semantic of isync would be more something like
PPC_IFETCH_BARRIER or similar :-)

Cheers,
Ben.