Re: [PATCH] 2.4.22pre10: {,un}likely_p() macros for pointers

[David S. Miller]

On Sat, 9 Aug 2003 10:13:46 +0200
Willy Tarreau <willy@xxxxxxxxx> wrote:

> (how could !!x be 0 if x isn't ?)

I believe the C language allows for systems where the NULL pointer is
not zero.

I can't think of any reason why the NULL macro exists otherwise.

However, even if I'm right, I dread the guy who has to make other
people's code work on such a platform.  Using normal boolean tests for
NULL pointer checks is just too common.

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