On 1/11/07 15:30, "Jeremy Fitzhardinge" <jeremy@xxxxxxxx> wrote: > Glauber de Oliveira Costa wrote: >> I in fact have seen bugs with mixed reads and writes to the same cr, >> (cr4), but adding the volatile >> flag to the read function seemed to fix it. > > Well, volatile will make a read be repeated rather than caching the > previous value, but it has no effect on ordering. volatile prevents the asm from being 'moved significantly', according to the gcc manual. I take that to mean that reordering is not allowed. -- Keir _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
