Re: [PATCH] C undefined behavior fix

From: Florian Weimer (
Date: Fri Jan 04 2002 - 04:05:07 EST

Paul Mackerras <> writes:

> One of the reasons why C is a good language for the kernel is that its
> memory model is a good match to the memory organization used by the
> processors that linux runs on. Thus, for these processors, adding an
> offset to a pointer is in fact simply an arithmetic addition.

But this is not the memory model of C! Adding an offset to a pointer
is an operation involving objects defined by the C language, and not
machine registers. Sometimes, this makes a noticeable difference.
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