2 kernels 1 set of lib/modules??

fred22 · 02-23-2005, 08:10 PM

Can I compile a new kernel of the same version and use the lib modules from the other kernel?

For example I have 2.6.10 but I need to customise it so a device will work. What I have found though when creating custom kernels is that other drivers don't play along with the new kernel. This is a pain. So I thought I could maybe copy the source and recompile the kernel and use the the same lib modules from my current kernel....I hope that made sense. I trying it now anyway....

Thanks

Tinkster · 02-23-2005, 08:32 PM

If I got you right ....

Not the SAME modules, but identical should work...

The way the modules are stored is extracted from
your kernels Makefile ... e.g.

Code:

VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 8
EXTRAVERSION = .1
NAME=Zonked Quokka

will store modules in
/lib/modules/2.6.8.1

Now if you have the working kernel installed you can
edit the Makefile like so:

Code:

VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 8
EXTRAVERSION = .1homebrew
NAME=Zonked Quokka

before you modify stuff ... make also sure you copy
the original .config file to a safe place :)

Cheers,
Tink

Shade · 02-24-2005, 02:31 AM

Realistically, I think it should work, as long as the two actual kernel images aren't configured drastically differently. A few things will affect whether the same module will work on both kernels --

1- Same kernel version
2- Same kernel stack size (4 or 8 kb)
3- SMP or single processor
4- Any module dependencies

There are probably more things which would impact your outcome, but on the same machine, not much would probably interfere.

Skip the 'make modules && make modues_install' step and see what happens :-D
Just copy your arch/i386/boot/bzImage to a location in /boot and A/B between the two kernel images.

--Shade