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Re: Status of a 2.6.30 kernel ? Other sources for a 2.6.30 kernel.



On Tue, Jul 28, 2009 at 13:25:35 -0400,
  Bill Davidsen <davidsen tmr com> wrote:
>
> The claim is that the test is optimized away, and that would seem to be  
> a separate issue from using the value of tun before testing.

But that is valid because if you had deferenced a null pointer previously
you are now in an undefined state and you can do anything. So it is valid
to optimize the test away because it always fails if the pointer is not
null and if it is null you are in a state where you are allowed to do
anything.


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