* Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote: > On Sat, 2011-05-21 at 15:37 +1200, Michael Cree wrote: > > While this is not a concern to the kernel (it obviously has access to > > location 0) > > Not that obvious... dunno how you do your memory map on alpha but on > most architectures, 0 is userspace even when you're in the kernel and is > typically not mapped. Correct, it's like that on x86 as well. Filtering out NULLs in the prefetch primitives or making sure NULL never gets prefetched looks like to be a generally good idea. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
