Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)

[Roland Dreier <rdreier@cisco.com>]

 > 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.

 - R.
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