Messages in this thread | | | Date | Tue, 05 Jun 2007 08:27:40 +0300 | From | Pekka Enberg <> | Subject | Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0) |
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Christoph Lameter wrote: > SLUB: Return ZERO_SIZE_PTR for kmalloc(0) V3 > > Instead of returning the smallest available object return ZERO_SIZE_PTR. > > A ZERO_SIZE_PTR can be legitimately used as an object pointer as long > as it is not deferenced. The dereference of ZERO_SIZE_PTR causes a > distinctive fault. > kfree can handle a ZERO_SIZE_PTR in the same way as NULL.
FWIW, I am happy :-). We should add a comment to kmalloc() that we return non-unique pointers for zero-length allocations though.
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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