I'm trying to incorporate some Kconfig settings into the kernel when I build the image.

specifically, I am trying to turn on the gpio access for the ixp425 cpu.  I've made a ixp4xx.mk kernel package and I'm not sure the settings are being turned on.

when I look at /kamikaze/build_dir/linux-ixp4xx/linux-2.6.21.6/.config I do not see that option listed anywhere, but if I look in /kamikaze/build_dir/linux-ixp4xx/linux-2.6.21.6/.config.overide I see it

...
CONFIG_IXP425_GPIO=y
...

My question is is this .config.override being used to build the kernel or is the .config one being used?  Specifically I'm interested in the avila zImage, how do I know which one is being used by for each zImage that is generated?