Release Notes - kernel

[Paul Howarth]

Mercury Morris wrote:
> Thanks for pointing out "Patching FC3 Kernel" thread.  I've made a note
> of it for later reference.
> 
> My immediate goal is not as complicated as a Kernel Patch, but it's
> turning out to be very very difficult.  All I want to do it update a single
> module that is part of the kernel.  It's called - ati_remote.
> 
> Even though the Release Notes make the claim that you do not need
> the kernel source to update a module, the Notes fail to explain that
> if you want to update a module that is part of the Kernel Source,
> then YOU MUST get and install the kernel's src.rpm.

That's not entirely true, If you have the source for the module, you 
don't need the kernel source.

> So, I tried to follow the section called 'kernel' in the Release Notes,
> but it is incomplete and just left me so, so confused.  I tried this process
> once before last November, and ended up re-building ALL the modules
> instead of just the single one to which I had applied a patch.  SO I gave
> up.  Now, I am so motivated to get the ATI Remote Wonder adjusted
> with a few changes to the table of Key Codes, I am asking for help both
> here and in the MythTV discussion for some simple, clear step(s) that
> will let me do
> 
> #make modules
> #make modules_install
> 
> and have just the single element, ati_remote, recompiled
> and installed so that the ATI Remote works reasonably.

The easiest way to do this is to use the "out of tree" method for 
building kernel modules, as described just underneath the main 
kernel-building section of the release notes.

If you have the module source file, ati_remote.c, you don't need the 
kernel source. Otherwise you can extract the ati_remote.c from the 
kernel source (drivers/usb/input/ati_remote.c).

Make a temporary directory and copy ati_remote.c into that directory. 
Make whatever changes you need to make to this file (the patch you refer 
to above). Then put the attached Makefile into that directory. This 
Makefile is just like the one mentioned in the release notes, but has an 
extra entry for doing the install too.

Do "make" in the temporary directory to build the module. Then, as root, 
do "make install" and then "depmod -a". The patched module will have 
been installed into /lib/modules/`uname -r`/extra/ati_remote.ko. 
"/sbin/modinfo ati_remote" should show that this module is the one that 
will be loaded when a "modprobe ati_remote" is done.

Easy!

Paul.
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