[elrepo] patching kernel modules agasint elrepo

[Morgan Yang]

Figured it out, I didn't copy the config into the build directory

On Tue, Nov 22, 2016 at 2:35 AM, Morgan Yang <morgan.yang1982 at gmail.com>
wrote:

> Hi Phil:
>
> Thanks for the tip. I went ahead and installed the kernel-lt-headers for
> 4.4-32-1 and downloaded the nosource.rpm as well. Here are my steps, please
> let me know if I missed any steps
>
> (1) rpm -i kernel-lt-devel-4.4.32-1.el7.elrepo.x86_64.rpm
>
> (2) rpm -i kernel-lt-4.4.32-1.el7.elrepo.nosrc.rpm  2>&1 | grep -v exist
>
> (3) I extracted linux-4.4.32 source (from kernel.org) under
>
> ~/rpmbuild/BUILD/kernel-4.4.32/linux-4.4.32
>
> (4) I copied Module.symvers from /usr/src/kernels/4.4.32-1.el7.elrepo.x86_64/
> to ~/rpmbuild/BUILD/kernel-4.4.32/linux-4.4.32
>
> (5) make clean && make oldconfig && make prepare && make modules_prepare
>
> (6) make M=net/ipv4 -j8 modules
>
> (7) I copied ip_gre to /usr/lib/modules/$(uname -r)/kernel/net/ipv4/
>
> (8) sudo depmod -a
>
> (9) sudo modprobe ip_gre
>
> modprobe: ERROR: could not insert 'ip_gre': Exec format error
>
> dmesg
> [295045.997265] ip_gre: no symbol version for module_layout
>
> I also repeated step 6 by changing the default kernel.org Makefile. I
> added "-1.el7.elrepo" to EXTRAVERSION
>
> VERSION = 4
> PATCHLEVEL = 4
> SUBLEVEL = 32
> EXTRAVERSION = -1.el7.elrepo
> NAME = Blurry Fish Butt
>
> That didn't see to make a difference as well.
>
> On Mon, Nov 21, 2016 at 11:30 PM, Phil Perry <phil at elrepo.org> wrote:
>
>> On 21/11/16 21:31, Morgan Yang wrote:
>>
>>> Hi All:
>>>
>>> I have downloaded and installed 4.4.32-1.el7.elrepo.x86_64 from
>>> elrepo-lt,
>>> I'm not patching kernel modules against 4.4.32 source code from
>>> www.kernel.org
>>>
>>>
>> I don't fully understand what you are trying to do, but...
>>
>>
>> 1. I downloaded and extracted the source https://www.kernel.org/
>>> pub/linux/kernel/v4.x/linux-4.4.32.tar.gz
>>>
>>> 2. I ported the patches from to the latest source
>>>
>>> 3. Built via the following commands
>>>
>>>    1. make clean && make oldconfig && make prepare && make
>>> modules_prepare
>>>    2. make modules -j8
>>>
>>>
>> you don't need to rebuild the whole kernel, you can just compile the
>> module in question against the currently running kernel. You will need the
>> kernel-lt-devel and kernel-lt-headers packages installed.
>>
>> I then copied the <module>.ko to /usr/lib/modules/4.4.32-1.e
>>> l7.elrepo.x86_64/kernel
>>>
>>> However, when  attemp to load the module, I see
>>>
>>> [242683.114843] ip_gre: no symbol version for module_layout
>>>
>>> Is it because version 4.4.32-1.el7.elrepo.x86_64 is failing the check?
>>> Since elrepo has no SRPM's, how would one go about patching changes
>>> without
>>> building and installing the entire kernel from kernel.org?
>>>
>>>
>> SRPMs are available here:
>>
>> http://elrepo.org/linux/kernel/el7/SRPMS/
>>
>> they are actually nosrc.rpm's (to save mirror space and bandwidth) so
>> you'll also need to download the corresponding kernel source tarball from
>> kernel.org, but otherwise contain everything you need to rebuild
>> elrepo's kernel packages.
>>
>>
>>
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>> http://lists.elrepo.org/mailman/listinfo/elrepo
>>
>
>
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