Messages in this thread | | | Subject | Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0) | From | Roland Dreier <> | Date | Mon, 04 Jun 2007 09:43:00 -0700 |
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> Then we might as well return your regular NULL pointer for zero-length > allocations as you can't do anything sane with ZERO_SIZE_PTR either.
No, because as was mentioned earlier in the thread, we want code to be able to handle 0-sized allocations without special cases. The goal is that code like
buf = kmalloc(nobj * obj_size); if (buf == NULL) return -ENOMEM;
should work fine if nobj happens to be 0. But we do want to get an oops if the code actually tries to read or write *buf.
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