On Sat, Feb 04, 2012 at 03:54:39PM +0000, Mark Brown wrote: > Rather than requiring architectures that use gpiolib but don't have any > need to define anything custom to copy an asm/gpio.h provide a Kconfig > symbol which architectures must select in order to include gpio.h and > for other architectures just provide the trivial implementation directly. Hi Mark. There is an even simpler solution. For each arch that uses asm-generic/gpio.h add a line to arch/$ARCH/include/asm/Kbuild like this: generic-y += gpio.h This will then make this arch pick up the asm-generic version when you do #include <asm/gpio.h>. And you avoid the kconfig games. iFor the archs which require their own asm/gpio.h file - just add it to the asm/ dir - and do not add the generic-y assignment. Sam