Re: [RFC/PATCH] unregister_node() for hotplug use

[Keiichiro Tokunaga]

On Thu, 21 Apr 2005 17:39:20 -0700 Greg KH wrote:
> On Fri, Apr 22, 2005 at 12:30:09AM +0900, Keiichiro Tokunaga wrote:
> > +#ifdef CONFIG_HOTPLUG
> > +void unregister_node(struct node *node)
> > +{
> > +	sysdev_remove_file(&node->sysdev, &attr_cpumap);
> > +	sysdev_remove_file(&node->sysdev, &attr_meminfo);
> > +	sysdev_remove_file(&node->sysdev, &attr_numastat);
> > +	sysdev_remove_file(&node->sysdev, &attr_distance);
> > +
> > +	sysdev_unregister(&node->sysdev);
> > +}
> > +EXPORT_SYMBOL_GPL(register_node);
> > +EXPORT_SYMBOL_GPL(unregister_node);
> > +#else /* !CONFIG_HOTPLUG */
> > +void unregister_node(struct node *node)
> > +{
> > +}
> > +#endif /* !CONFIG_HOTPLUG */
> 
> Oops, you only exported the symbols if CONFIG_HOTPLUG is enabled, not a
> good idea.  Either make the null functions in a .h file if the option is
> not enabled, or always export them.

  My bad...

> And the comment for the #endif isn't really needed, as the whole #ifdef
> fits on a single screen :)

  I see:)  That makes sense.

> And hey, what's the real big deal here, why not always have this
> function no matter if CONFIG_HOTPLUG is enabled or not?  I really want
> to just make that an option that is always enabled anyway, but changable
> if you are using CONFIG_TINY or something...

  I put the #ifdef there for users who don't need hotplug
stuffs, but I want to make the option always enabled, too.
Also a good side effect, the code would be cleaner:)  I
will be updating my patch without the #ifdef and sending
it here.

Thanks!
Keiichiro Tokunaga
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