Am 15.01.2015 um 11:43 schrieb David Vrabel: > On 15/01/15 08:58, Christian Borntraeger wrote: >> ACCESS_ONCE does not work reliably on non-scalar types. For >> example gcc 4.6 and 4.7 might remove the volatile tag for such >> accesses during the SRA (scalar replacement of aggregates) step >> (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) >> >> Change the p2m code to replace ACCESS_ONCE with READ_ONCE. > > Acked-by: David Vrabel <david.vrabel@xxxxxxxxxx> Thanks > Let me know if you want me to merge this via the Xen tree. With your Acked-by, I can easily carry this in my tree. We can then ensure that this patch is merged before the ACCESS_ONCE is made stricter - making bisecting easier. Christian -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>