Re: Registering for notifier chains in modules (was Linux 2.4.21-rc3- ipmi unresolved)

[Corey Minyard (minyard@acm.org)]

viro@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx wrote:

>On Tue, May 27, 2003 at 09:48:53AM -0500, Corey Minyard wrote:
>
>  
>
>>>The user does have to do something.  Every piece of code that calls
>>>notify_register has to set the new field to __THIS_MODULE.  WIthout
>>>that field being set, you are no better off, the race still exists.
>>>
>>>      
>>>
>>Why?  The user doesn't have to set the field, you can let the
>>registration code do that.  I have attached a patch as an example.
>>    
>>
>
>How the devil would registration code figure out which module should
>be used?
>  
>
You create a new call that also takes the module as a parameter, and
have the old call set the module owner to NULL.  You export the new
call, and modules use it.

-Corey

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