"couldn't find the kernel version the module was compiled for" - help!

"couldn't find the kernel version the module was compiled for" - help!

[Timur Tabi]

I'm at a loss to explain why I can't get this working.

I have a driver written for 2.4 that I'm porting back to 2.2.  Every time I
think I got it working, something surprises me.  

First, I had a bunch of link errors on the redifintion of
__module_kernel_version.  To fix that, someone told me to do this:

#define __NO_VERSION__
#include <linux/version.h>

And sure enough, no more errors.

However, now I get this error from insmod when I try to load my driver:

[root@two ttabi]# insmod tdmcddk.sys 
tdmcddk.sys: couldn't find the kernel version the module was compiled for

I've tried all sorts of things - recompiling the kernels, changing the order of
#include files (version.h, module.h, modversions.h, whatever).  Either the
driver won't link, or it won't load.

I had our other Linux programmer (who works only with 2.2) look at the problem,
but he couldn't figure it out, either.

I'd be very appreciative of any assistance.



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Re: "couldn't find the kernel version the module was compiled for" - help!

[Steven Walter]

If my understanding is correct, you need to include version.h without
"#define __NO_VERSION__" in one and only one of your module's .c files.
More than one, and you get redefinition errors; less than one, and its
undefined.

On Tue, Nov 14, 2000 at 03:58:38PM -0600, Timur Tabi wrote:
> I'm at a loss to explain why I can't get this working.
> 
> I have a driver written for 2.4 that I'm porting back to 2.2.  Every time I
> think I got it working, something surprises me.  
> 
> First, I had a bunch of link errors on the redifintion of
> __module_kernel_version.  To fix that, someone told me to do this:
> 
> #define __NO_VERSION__
> #include <linux/version.h>
> 
> And sure enough, no more errors.
> 
> However, now I get this error from insmod when I try to load my driver:
> 
> [root@two ttabi]# insmod tdmcddk.sys 
> tdmcddk.sys: couldn't find the kernel version the module was compiled for
> 
> I've tried all sorts of things - recompiling the kernels, changing the order of
> #include files (version.h, module.h, modversions.h, whatever).  Either the
> driver won't link, or it won't load.
> 
> I had our other Linux programmer (who works only with 2.2) look at the problem,
> but he couldn't figure it out, either.
> 
> I'd be very appreciative of any assistance.
> 
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Re: "couldn't find the kernel version the module was compiled for" - help!

[Timur Tabi]

** Reply to message from Steven Walter <srwalter@hapablap.dyn.dhs.org> on Tue,
14 Nov 2000 16:31:54 -0600


> If my understanding is correct, you need to include version.h without
> "#define __NO_VERSION__" in one and only one of your module's .c files.
> More than one, and you get redefinition errors; less than one, and its
> undefined.

I tried that, and it didn't help.



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Re: "couldn't find the kernel version the module was compiled for" - help!

[Keith Owens]

On Tue, 14 Nov 2000 15:58:38 -0600, 
Timur Tabi <ttabi@interactivesi.com> wrote:
>First, I had a bunch of link errors on the redifintion of
>__module_kernel_version.  To fix that, someone told me to do this:
>
>#define __NO_VERSION__
>#include <linux/version.h>

"#define __NO_VERSION__" must be in all but one of the sources that
also include module.h.  It suppresses the module_version string in
module.h so it only make sense if the code includes module.h.  But
exactly one of the objects in a module must have a module_version
string.

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Re: "couldn't find the kernel version the module was compiled for" - help!

[Timur Tabi]

** Reply to message from Keith Owens <kaos@ocs.com.au> on Wed, 15 Nov 2000
10:31:22 +1100


> "#define __NO_VERSION__" must be in all but one of the sources that
> also include module.h.  It suppresses the module_version string in
> module.h so it only make sense if the code includes module.h.  But
> exactly one of the objects in a module must have a module_version
> string.

Ok, I made this change:

#ifndef __ENTRY_C__
#define __NO_VERSION__
#endif
#include <linux/version.h>

and in entry.c:

#define __ENTRY_C__
#include "include.h"

Unfortunately, it still doesn't work.

I tried "insmod -f tdmcddk.sys", but that didn't help either.



-- 
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com

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Re: "couldn't find the kernel version the module was compiled for" - help!

[Keith Owens]

On Tue, 14 Nov 2000 17:35:37 -0600, 
Timur Tabi <ttabi@interactivesi.com> wrote:
>Ok, I made this change:
>
>#ifndef __ENTRY_C__
>#define __NO_VERSION__
>#endif
>#include <linux/version.h>
>
>and in entry.c:
>
>#define __ENTRY_C__
>#include "include.h"
>
>Unfortunately, it still doesn't work.

__NO_VERSION__ must be defined before #include <module.h>.  Do it by hand.

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Re: "couldn't find the kernel version the module was compiled for" - help!

[Timur Tabi]

** Reply to message from Keith Owens <kaos@ocs.com.au> on Wed, 15 Nov 2000
10:41:42 +1100


> __NO_VERSION__ must be defined before #include <module.h>.  

It is:

#ifdef LINUX
#ifndef __ENTRY_C__
#define __NO_VERSION__
#endif
#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>

>Do it by hand.

I don't know what you mean by that.




-- 
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com

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Re: "couldn't find the kernel version the module was compiled for" - help!

[David Schleef]

On Tue, Nov 14, 2000 at 05:44:42PM -0600, Timur Tabi wrote:
> ** Reply to message from Keith Owens <kaos@ocs.com.au> on Wed, 15 Nov 2000
> 10:41:42 +1100
> 
> 
> > __NO_VERSION__ must be defined before #include <module.h>.  
> 
> It is:
> 
> #ifdef LINUX
> #ifndef __ENTRY_C__
> #define __NO_VERSION__
> #endif
> #include <linux/version.h>
> #include <linux/module.h>
> #include <linux/kernel.h>
> #include <linux/types.h>
> 
> >Do it by hand.
> 
> I don't know what you mean by that.
> 


Module source should look like this:

  single .c -> single .o

    #include <linux/kernel.h>
    #include <linux/module.h>

  multiple .c -> single .o, main .c file (contains init_module(), etc.)

    #include <linux/kernel.h>
    #include <linux/module.h>

  multiple .c -> single .o, secondary .c file

    #include <linux/kernel.h>

  multiple .c -> single .o, secondary .c file that requires module.h
  for a particular purpose, such as EXPORT_SYMBOL()

    #define __NO_VERSION__
    #include <linux/kernel.h>
    #include <linux/module.h>

Note that in most cases, you _don't_ need to include module.h.

Your Makefile should call gcc with '-D__KERNEL__ -DMODULE', as well
as other approprate flags.




dave...

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