On Wed, 11 Feb 2015, Christoph Lameter wrote:

> > > > Hmm, not sure why the allocator would be required to do the
> > > > EXPORT_SYMBOL() if it defines kmem_cache_free_array() itself.  This
> > >
> > > Keeping the EXPORT with the definition is the custom as far as I could
> > > tell.
> > >
> >
> > If you do dummy functions for all the allocators, then this should be as
> > simple as unconditionally defining kmem_cache_free_array() and doing
> > EXPORT_SYMBOL() here and then using your current implementation of
> > __kmem_cache_free_array() for mm/slab.c.
> 
> That works if I put an EXPORT_SYMBOL in mm/slab_common.c and define the
> function in mm/slub.c?
> 

No, my suggestion was for the same pattern as kmem_cache_alloc_array().  
In other words, I think you should leave the definition of 
kmem_cache_free_array() the way it is in your patch, remove the #ifndef 
since _HAVE_SLAB_ALLOCATOR_ARRAY_OPERATIONS is going away, and then define 
a __kmem_cache_free_array() for each allocator.
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