On Tue, Jul 10, 2012 at 10:19:38PM +0100, Arnd Bergmann wrote: > On Tuesday 10 July 2012, Ingo Molnar wrote: > > Do you really think that all of the 32-bit ARM code should > > essentially be thrown away when going to 64-bit ARM, that > > patches can only touch arch/arm64/ + drivers/ or the highway? > > Yes. > > If you're curious, please have a look at arch/arm/mach-spear13xx/. > this is the latest platform that we have added. It's fully > functional (except PCI, which I hope will be added in > drivers/pci/bus, which is another story), A significant portion > of that platform deals with SMP support, which is being standardized > for AArch64, so there will be only one implementation. Another > big portion is DMA-engine support, which is moving out of arch/arm > as soon as we have a proper DT binding. Finally there are some > boilerplate header files that are going away too. > > Once we're done with this, we will basically need zero code > in arch/*/ to support a new platform, and that is very easy > to share between two distinct arch/* directories ;-)
OK, so Arnd's plan for 32-bit ARM SoCs are even better than what I've envisaged ;) -- Catalin -- 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/