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Randy Dunlap
78b10615ad
Calls to optional subsystems cannot be made indiscriminately. Enclose all of the usb helper functions inside #if IS_ENABLED(CONFIG_USB) to fix these build errors. (The pci helper functions are OK since there are stubs in linux/pci.h for the called functions when PCI is not enabled. Possibly the same could be done for the called USB functions.) ERROR: "usb_deregister" [drivers/staging/comedi/comedi.ko] undefined! ERROR: "usb_register_driver" [drivers/staging/comedi/comedi.ko] undefined! Signed-off-by: Randy Dunlap <[email protected]> Cc: Ian Abbott <[email protected]> Cc: Frank Mori Hess <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>