* Greg KH | 2012-04-21 08:34:02 [-0700]: >> > CONFIG_MODULES is not enabled. >> > CONFIG_TCM_USB_GADGET=y >> > CONFIG_USB_GADGET=y >> >> Sebastian + Greg-KH (Cc'ed), any ideas why this is the case here..? > >I have no idea, sorry. The short version: in order to fix this either move the usb-target-gadget to drivers/usb/gadget/Kconfig and make sure only one gadget can be compiled at a time or add some kind of depends. The longer version: This is a short comming of the gadget framework. We are able to build multiple UDCs at a time and we can build multiple gadgets _as_ modules. Since we can not bind & configure via an interface the whole thing works right now via "modprobe $gadget. There is some infrastructure to accept multiple UDCs/gadget but the *whole* thing is not complete. In non-modules mode you can only select one gadget at a time. With the target gadget living outside of usb/gadget selection it is possible to select both at the same time which causes the duplicate symbols here. A "quick" fix is not to define all the functions static and put maybe_unsued on each function to avoid warnings. This is only duct tape on top and I would prefer that nobody is sending such a patch. The result is hardly usefull by a user. A real fix would to get rid of the "#includes foo.c" and use a helper module/library instead. I tried this once and notice that the whole thing relies on static/global variables which are initialized once on modprobe. So with the second module loaded (read as rmmod $mod1 && modprobe $mod2) the gadget framework explodes. Once I noticed that, the patches got out of Felipe's tree before anyone noticed something. That means we should first get rid of the global variables and then maybe try again :) Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
