On 02/27/2013 02:52 PM, Stephen Boyd wrote: > On 02/27/13 14:19, H. Peter Anvin wrote: >> On 02/27/2013 12:42 PM, Stephen Boyd wrote: >>>> It's fine to do your patch as a first step though, which would not >>>> change the behavior. >>> A lot of arches seem to not want to enable it because false positives >>> are everywhere. It really depends on how good the compiler is at doing >>> constant propagation and dead code removal. >>> >> Although some of the cases I have seen being flagged as "false >> positives" have been real bugs. > > There were so many false-positives on x86_64 that Andrew eventually > dropped my patch to add support for this option to the copy_from_user() > function there. > I would probably have taken it, especially if it came with more x86-64 to i386 unification. It's an option, though. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
