Re: [glommer-memcg:kmemcg-slab 57/62] drivers/video/riva/fbdev.c:281:9: sparse: preprocessor token MAX_LEVEL redefined

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On Mon, Sep 10, 2012 at 04:58:02PM +0400, Glauber Costa wrote:
> On 09/10/2012 04:57 PM, Fengguang Wu wrote:
> > Glauber,
> > 
> > The patch entitled
> > 
> >  sl[au]b: Allocate objects from memcg cache
> > 
> > changes
> > 
> >  include/linux/slub_def.h |   15 ++++++++++-----
> > 
> > which triggers this warning:
> > 
> > drivers/video/riva/fbdev.c:281:9: sparse: preprocessor token MAX_LEVEL redefined
> > 
> > It's the MAX_LEVEL that is defined in include/linux/idr.h.
> > 
> > MAX_LEVEL is obviously too generic. Better adding some prefix to it?
> > 
> 
> I don't see any MAX_LEVEL definition in this patch. You say it is
> defined in include/linux/idr.h, and as the diffstat shows, I am not
> touching this file.

It's a rather *unexpected* side effect. You changed slub_def.h to
include memcontrol.h/cgroup.h which in turn includes idr.h.

> I think this needs patching independently.

Yes, sure. And perhaps send it for quick inclusion before your patches?

Thanks,
Fengguang
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