Acid...I am having the same problem. Although the only .config file I can find is the one located in kernel directory. However, that .config file doesn't match my current configuration.
I am trying to find why the .config not match my current system configuration. I checked this right after installing RH 7.1. I did a make xconfig, loaded the .config, and saved it without making any changes, and compiled. When I rebooted, at least 3 items failed.
Could you explain why is it that when I do a make xconfig or menuconfig, what I get doesn't reflect how my system is currently configured.