On Thu, Jul 28, 2005 at 10:11:18AM -0700, Christoph Lameter wrote: > On Thu, 28 Jul 2005, Andrew Morton wrote: > > The patches at present spit warnings or don't compile on lots of > > architectures. x86, x86_64, ppc64 and ia64 are OK. > > I have just sent a fix to you this morning when I got your messages. > Sadly I do not have access to the architectures that failed (arm, alpha > and ppc32) but the fix simply removes code that is not used for these > arches.
ARM can't support atomic page table operations as such - the Linux view of the page table is separate from the hardware view, and there's some CPU specific code which translates from the Linux view to the hardware view. Looking at the actual patches, particularly pte_xchg-and-pte_cmpxchg.patch combined with the above, the ARM solution would be to go back to using non-atomic operations here (since we can't do this atomically.) Also, since the MMU will only ever read from the page tables, I don't think we need to play any games with clearing out ptes before we replace the value. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
