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    SubjectRe: [RFC] [PATCH] cpuset operations causes Badness at mm/slab.c:777 warning
    Linus Torvalds wrote:
    > So for *both* of the above reasons, it's actually stupid to return NULL
    > for a zero-sized allocation. It would be much better to return another
    > pointer that will trap on access. A good candidate might be to return
    > #define BADPTR ((void *)16)

    I think this is a good idea in principle, but I wonder if there's any
    code which assumes that kmalloc(x) != kmalloc(x) for all non-NULL
    returns from kmalloc.

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