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    SubjectRe: kfree(0) - ok?
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    On Tue, 2007-08-14 at 15:59 -0700, Tim Bird wrote:
    > Hi all,
    >
    > I have a quick question.
    >
    > I'm trying to resurrect a patch from the Linux-tiny patch suite,
    > to do accounting of kmalloc memory allocations. In testing it
    > with Linux 2.6.22, I've found a large number of kfrees of
    > NULL pointers.
    >
    > Is this considered OK? Or should I examine the offenders
    > to see if something is coded badly?

    kfree(NULL) is explicitly ok and it saves code size to not check
    anywhere
    (the idea is that kfree(kmalloc(...)); is a guaranteed safe nop)

    NULL is not 0 though.


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