Custom kernel for RPi2 and 3

[bob prohaska]

Does anyone have a recipe for building a custom RPi2 or RPi3 kernel?

I tried it, by simply commenting out drivers I didn't recognize in
GENERIC, but after much trial-by-error the kernel didn't shrink a lot.
Having since learned that GENERIC is the tail of a much larger beast,
perhaps there's a more intelligent method.

Thanks for reading, and any guidance!

bob prohaska