Messages in this thread | | | Date | Sat, 9 Aug 2003 10:36:29 +0100 | From | Jamie Lokier <> | Subject | Re: [PATCH] 2.4.22pre10: {,un}likely_p() macros for pointers |
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David S. Miller wrote: > On Sat, 9 Aug 2003 10:13:46 +0200 Willy Tarreau <willy@w.ods.org> 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.
That is irrelevant. The GCC manual says you can't use a pointer as the argument to __builtin_expect anyway:
Since you are limited to integral expressions for EXP, you should use constructions such as
if (__builtin_expect (ptr != NULL, 1)) error ();
when testing pointer or floating-point values
-- Jamie - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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