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SubjectRe: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)
> On Fri, 1 Jun 2007 18:37:46 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
>
> +#define ZERO_SIZE_PTR ((void *)16)

Jeremy's point was a good one. The kernel _does_ use address-comparison
to determine object-inequality in an unknown but non-zero number of places.

It is of course unlikely that this will occur in conjunction with zero-sized
objects, but who knows?
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