linux-kernel - Re: "make prepare" in 2.6.26.2 not behaving?

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Date:	Tue, 19 Aug 2008 13:11:27 -0700
From:	Stuart Sheldon <stu@...usa.net>
To:	Sam Ravnborg <sam@...nborg.org>
CC:	linux-kernel@...r.kernel.org
Subject: Re: "make prepare" in 2.6.26.2 not behaving?



Sam Ravnborg wrote:
> On Mon, Aug 18, 2008 at 08:41:59PM -0700, Stuart Sheldon wrote:
>> Hey all, think I found a little bug...
>>
>> I recently was attempting to build 3rd party modules on a 2.6.26.2 
>> source tree after a "make clean" was run on the kernel source tree.
>>
>> In the past I would run "make oldconfig prepare scripts" and then build 
>> and install the 3rd party module. All would work as expected.
>>
>> And all started well with the 2.6.26.2 tree. The module built without 
>> error, but when I went to load it, it responded back with a version 
>> error on the console, and the dmesg was: "no symbol version for 
>> struct_module".
>>
>> If I rebuild the entire kernel and modules in the source tree and then 
>> build the 3rd party module again, It builds and loads without issue.
>>
>> I'm hoping this is a bug, as I use the prepare method of setting up 
>> source trees a lot. It saves me hours of time on my server farm.
> 
> If you have MODULE_VERSIONING enabled then you need to build
> the kernel - "make prepare" is in that case not enough.
> 
> Ig you have module.symvers around then that will do it.
> 
> 	Sam
> 

So the patch to delete the module.symvers from the tree exposed a 
mistake in my config? Makes since. Just to clarify, I want 
CONFIG_MODVERSIONS=n in my .config to use prepare? The help on the 
setting seems to imply that turning it on makes the kernel less picky 
about modules, but I guess I don't get it...

Will change that setting and test.

Thanks!

Stu

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