Messages in this thread | | | Date | Mon, 30 Jan 2012 11:22:14 -0600 (CST) | From | Christoph Lameter <> | Subject | Re: [PATCH 1/3] percpu: use ZERO_SIZE_PTR / ZERO_OR_NULL_PTR |
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On Mon, 30 Jan 2012, Tejun Heo wrote:
> Percpu pointers are in a different address space and using > ZERO_SIZE_PTR directly will trigger sparse address space warning. > Also, I'm not entirely sure whether 16 is guaranteed to be unused in > percpu address space (maybe it is but I don't think we have anything > enforcing that).
We are already checking for NULL on free. So there is a presumption that these numbers are unused.
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