On 07/15/2014 08:53 AM, Guenter Roeck wrote: > On 07/14/2014 05:34 PM, Chen Gang wrote: >> On 07/14/2014 05:22 PM, Chen Gang wrote: >>> >>> 在 2014年7月14日，下午4:57，Richard Weinberger <richard@xxxxxx> 写道： >>> >>>> Am 14.07.2014 10:48, schrieb Lars-Peter Clausen: >>>>> On 07/14/2014 10:31 AM, Richard Weinberger wrote: >>>>>> Am 13.07.2014 22:17, schrieb Greg Kroah-Hartman: >>>>>>> On Sun, Jul 13, 2014 at 09:33:38PM +0200, Richard Weinberger wrote: >>>>>>>> Maybe we could add COMPILE_TEST to the version string too? >>>>>>>> Just to detect such kernels fast in user bug reports... >>>>>>> >>>>>>> What kind of bug report are you going to get? >>>>>> >>>>>> User manages to enable CONFIG_FOO by selecting COMPILE_TEST and >>>>>> complains that it does not work. :) >>>>> >>>>> These drivers are typically drivers for some SoC peripheral and the >>>>> device will simply physically not exist on a platform that does not >>>>> provide HAS_IOMEM. This is not really any >>>>> different from making the driver selectable via COMPILE_TEST for >>>>> any other platform. To hit the issue you'd have to instantiate a >>>>> device driver instance for a device that >>>>> physically does not exist. This will always result in a failure. >>>> >>>> Okay, you have convinced me. :) >>>> >> >> After search the history patches, I found one related patch which made >> by myself (when I am in Asianux): >> >> "https://lkml.org/lkml/2013/7/1/641"; >> >> For me, it is a long discussion, and forced many members have to join >> in. Please help check again. >> > > One thing you could try would be to return NULL (or where appropriate > an error) in the #else case of CONFIG_HAS_IOMEM and CONFIG_HAS_IOPORT, > ie dont take COMPILE_TEST into account at all. Obviously that means > you won't be able to dump a warning message in the COMPILE_TEST > case, but at least the code would compile. The rejection of above patch > would make a good case for this approach. > OK, thanks: at least, it can be improved. But still welcome any other opinions of another related members. 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
