[gentoo-user] genkernel compile only one new module

[gentoo-user] genkernel compile only one new module

["ifj. Stefán István"]

Hello!

I have a quite good kernel, but today I realised that I need a kernel 
module that hadn't been compiled before.
Is there any way to compile only that new module, and not compiling the 
whole kernel and all of the modules again?

Thanks,
István

Re: [gentoo-user] genkernel compile only one new module

[Bruce Hill]

On Thu, Nov 08, 2012 at 06:55:31PM +0100, "ifj. Stefán István" wrote:
> Hello!
> 
> I have a quite good kernel, but today I realised that I need a kernel 
> module that hadn't been compiled before.
> Is there any way to compile only that new module, and not compiling the 
> whole kernel and all of the modules again?
> 
> Thanks,
> István

make nconfig (or menuconfig or whatever-config)
select M for the module
exit and save
make && make modules_install
will put the module into /lib/modules/`uname -r`/build/
then you can "modprobe <symbol for module>"
and it will be in use.

You should go ahead and install that new kernel and edit your bootloader as
needed.

Bruce
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Re: [gentoo-user] genkernel compile only one new module

[mindrunner]

Why exactly would you do this? Just because of saving time?
If you do not clean kernel dir, it will compile very fast.

On 11/08/2012 07:02 PM, Bruce Hill wrote:
> On Thu, Nov 08, 2012 at 06:55:31PM +0100, "ifj. Stefán István"
> wrote:
>> Hello!
>>
>> I have a quite good kernel, but today I realised that I need a
>> kernel module that hadn't been compiled before. Is there any way
>> to compile only that new module, and not compiling the whole
>> kernel and all of the modules again?
>>
>> Thanks, István
>
> make nconfig (or menuconfig or whatever-config) select M for the
> module exit and save make && make modules_install will put the
> module into /lib/modules/`uname -r`/build/ then you can "modprobe
> <symbol for module>" and it will be in use.
>
> You should go ahead and install that new kernel and edit your
> bootloader as needed.
>
> Bruce
>

Re: [gentoo-user] genkernel compile only one new module

[Mark David Dumlao]

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make was specifically designed so that by default, it would only compile
things whose dependencies had changed since last run.

If your kernel config had not selected the object before, and all you do is
add it as a module, then when you rerun make, only that module should be
recompiled. However if you do built-in to module or vice versa, you're out
of luck.
On Nov 9, 2012 12:58 AM, ifj. Stefán István <istefan@stef.hu> wrote:

> Hello!
>
> I have a quite good kernel, but today I realised that I need a kernel
> module that hadn't been compiled before.
> Is there any way to compile only that new module, and not compiling the
> whole kernel and all of the modules again?
>
> Thanks,
> István
>
>

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