Messages in this thread | | | Date | Sat, 02 Jun 2007 09:28:38 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [RFC 0/4] CONFIG_STABLE to switch off development checks |
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Dave Kleikamp wrote: > I'm on Christoph's side here. I don't think it makes sense for any code > to ask to allocate zero bytes of memory and expect valid memory to be > returned. >
Yes, everyone agrees on that. If you do kmalloc(0), its never OK to dereference the result. The question is whether kmalloc(0) should complain.
> Would a compromise be to return a pointer to some known invalid region? > This way the kmalloc(0) call would appear successful to the caller, but > any access to the memory would result in an exception. >
Yes, that's what Christoph has posted. I'm slightly concerned about kmalloc() returning the same non-NULL address multiple times, but it seems sound otherwise.
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