On 07/18/2014 11:37 PM, Lennox Wu wrote: > Score can provide dummy functions if HAS_IOMEM and NO_IOMEM will be > removed, even if we indeed have no IOMEM. > Thank you for your reply, for score, your ideas is OK to me. And for the COMPILE_TEST needs still discussing below: > 2014-07-18 18:51 GMT+08:00 Richard Weinberger <richard@xxxxxx>: >> Am 18.07.2014 12:44, schrieb Chen Gang: >>> On 07/18/2014 03:35 PM, Richard Weinberger wrote: >>>> Am 18.07.2014 02:36, schrieb Chen Gang: >>>>> >>>>> On 07/18/2014 02:09 AM, Richard Weinberger wrote: >>>>>> Am 17.07.2014 12:48, schrieb Arnd Bergmann: >>>>>>> AFAICT, NO_IOMEM only has a real purpose on UML these days. Could we take >>>>>>> a shortcut here and make COMPILE_TEST depend on !UML? Getting random stuff >>>>>>> to build on UML seems pointless to me and we special-case it in a number of >>>>>>> places already. >>>>>> >>>>>> If UML is the only arch without io memory the dependency on !UML seems >>>>>> reasonable to me. :-) >>>>>> >>>>> >>>>> For me, if only uml left, I suggest to implement dummy functions within >>>>> uml instead of let CONFIG_UML appear in generic include directory. And >>>>> then remove all HAS_IOMEM and NO_IOMEM from kernel. >>>> >>>> Erm, this is something completely different. >>>> I thought we're focusing on COMPILE_TEST? >>>> >>> >>> COMPILE_TEST is none-architecture specific, but UML is. So in generic >>> include folder, if we're focusing on choosing whether COMPILE_TEST or >>> UML, for me, I will choose COMPILE_TEST. >>> >>> If we're not only focusing on COMPILE_TEST, for me, if something only >>> depend on one architecture, I'd like to put them under "arch/*/" folder. >>> >>> Especially, after that, we can remove all HAS_IOMEM and NO_IOMEM, nobody >>> has to think of them again. :-) >> >> And then we end up with a solution that on UML a lot of completely useless >> drivers are build which fail in various interesting manners because you'll >> add stubs for all kinds of io memory related functions to arch/um/? >> We had this kind of discussion already. You'll need more than ioremap... >> >> I like Arnd's idea *much* more to make COMPILE_TEST depend on !UML. >> That will let UML itself against COMPILE_TEST (but all the other architectures not). And if let COMPILE_TEST depend on !UML, can we still remove all HAS_IOMEM and NO_IOMEM from kernel? (I guess so). If we can remove them, we can send related patch firstly -- that will let current discussion be in UML architecture wide instead of kernel wide. Thanks. -- Chen Gang Open share and attitude like air water and life which God blessed -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
