On Thu, Aug 7, 2014 at 10:15 AM, Max Filippov <jcmvb...@gmail.com> wrote: > Hi, > > On Wed, Aug 6, 2014 at 11:32 PM, Kees Cook <keesc...@chromium.org> wrote: >> ARM is different from other architectures in that fixmap pages are indexed >> with a positive offset from FIXADDR_START. Other architectures index with >> a negative offset from FIXADDR_TOP. In order to use the generic fixmap.h > > Does anybody know if there's any reason why generic fixmap.h uses negative > offsets? It complicates things with no obvious benefit if you e.g. try to > align > virtual address in the fixmap region with physical page color (that's why I've > switched xtensa to positive fixmap addressing in v3.17).
No, but each arch doing it differently is even more annoying. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
