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SubjectRe: [PATCH] 2.4.22pre10: {,un}likely_p() macros for pointers
On Sad, 2003-08-09 at 09:51, David S. Miller wrote:
> I believe the C language allows for systems where the NULL pointer is
> not zero.

Its a fudge for some systems. However NULL == 0 is always true.

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

NULL is really important in K&R C because you don't have prototypes and
sizeof(foo *) may not be the same as sizeof(int). This leads to very
nasty problems that people nowdays forget about.

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