Kernel config file

[andretti]

Is it safe to load a .config file of an older kernel version in 'make menuconfig' of a newer version kernel?

I'm planning to upgrade a kernel from 2.6.21.5 to 2.6.22.1. I wonder if I could load the old 2.6.21.5 kernel .config file in 2.6.22.1 kernel's 'make menuconfig'. Would the 'Load an Alternative Configuration File' function in 'make menuconfig' be smart enough to deal with config file from older version?

[Rob1n]

Yes - it'll ignore any settings which have been removed from the newer kernel. You can also copy the .config file over and run "make oldconfig" which'll then just prompt you for any new settings.