Re: [PATCH] memory hotplug: fix warnings

[David Rientjes]

On Tue, 30 Apr 2013, Andrew Morton wrote:

> > > diff --git a/include/linux/memory.h b/include/linux/memory.h
> > > index 73817af..85c31a8 100644
> > > --- a/include/linux/memory.h
> > > +++ b/include/linux/memory.h
> > > @@ -137,7 +137,7 @@ enum mem_add_context { BOOT, HOTPLUG };
> > >  #define register_hotmemory_notifier(nb)		register_memory_notifier(nb)
> > >  #define unregister_hotmemory_notifier(nb) 	unregister_memory_notifier(nb)
> > >  #else
> > > -#define hotplug_memory_notifier(fn, pri)	(0)
> > > +#define hotplug_memory_notifier(fn, pri)	({ 0; })
> > >  /* These aren't inline functions due to a GCC bug. */
> > >  #define register_hotmemory_notifier(nb)    ({ (void)(nb); 0; })
> > >  #define unregister_hotmemory_notifier(nb)  ({ (void)(nb); })
> > 
> > You can't use the standard do {} while (0)?
> 
> register_memory_notifier() (and hence hotplug_memory_notifier())
> returns an errno.  Which nobody bothers checking.
> 

The notifier itself is statically allocated so there's no memory 
allocations in this path, there's no chance it'll fail.  Should we just 
make register_memory_notifier() return void?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/