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Re: MOD_INC_USE_COUNT

--- John Levon <levon@movementarian.org> wrote:
>On Sun, Dec 08, 2002 at 12:51:43PM -0800, Jose Luis Alarcon wrote:
>
>>   I has a big surprise when, adding at the beginning of init_module()
>> the macro MOD_INC_USE_COUNT, for have a module use counter. My program
>> get compile well and insmod work too.
>> 
>>   But the surprise was when i did rmmod, cos the output said:
>> 
>> FATAL: the module is in use
>
>Why are you surprised ? You marked the module as used by something when
>you load it, of course it can't be unloaded.
>

  Jonh: first, thank you very much for answer my question.

  I am surprised cos if the line MOD_INC_USE_COUNT; is commented, then
the lsmod command say that the module is used by 0 (unused, i think) and
the rmmod command uninstall the module without nothing to say.  

>>   I did lsmod, and i got that my module was used by [unsafe].
>
>You should not be using MOD_INC_USE_COUNT in 2.5 kernels. And you
>definitely shouldn't be doing it in init_module(), that makes no sense.
>

  Can you explain, please, why the macro have no sense in init_module()?, maybe
(i am thinking about it) use this counter make no sense in any place at the 
module, but i am learning and i only want to see it working.

>What do you actually believe MOD_INC_USE_COUNT does ?
>

  I was reading that create a counter that count the number of times that the
module is used, is it right?

>regards
>john
>

  Thank you, Jonh, again.

  Regards.

  Jose.

Debian GNU/Linux 'Sid' Kernel 2.4.19 Ext3.
ESware Linux 365 Kernel 2.5.49 ReiserFS.
Registered Linux User #213309.
Memories..... You are talking about memories.
Rick Deckard. Blade Runner.

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