On Tue, Dec 09, 2014 at 08:50:32AM +0000, Russell King wrote: > On Tue, Dec 09, 2014 at 04:55:42PM +0900, Joonsoo Kim wrote: > > Could you manage this fix for above boot regression in x86? > > Patch itself is so dirty, because __pa_nodebug() is implemented only > > in x86. If someone knows better idea, please let me know. > > > +#ifdef CONFIG_X86 > > + /* > > + * high_memory isn't direct mapped memory so retrieving it's > > + * physical address isn't appropriate. But, it would be useful > > + * to check physical address of highmem boundary so it's > > + * justfiable to get physical address from it. In x86, there is > > + * a validation check for this case, so following workaround is > > + * needed to avoid it. > > + */ > > + highmem_start = __pa_nodebug(high_memory); > > +#else > > + highmem_start = __pa(high_memory); > > +#endif > > What about: > > highmem_start = __pa(high_memory - 1) + 1; > > As "high_memory - 1" should be a valid lowmem address.
Thanks for suggestion. It looks tricky but it would work. I think that this one need to be fully tested, so the first dirty one is better for the stable tree. I will check and test Russell's suggestion and send it as clean-up. Thanks. -- 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/
