Messages in this thread | | | Subject | Re: [PATCH]: x86_64: Remove unnecessary cast in prefetch() | From | Serge Belyshev <> | Date | Sun, 16 Sep 2007 01:16:18 +0400 |
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Andi Kleen <andi@firstfloor.org> writes:
... >> to make kernel work with GCC 4.3 and above. (Also note that gcc 4.2 already >> smart enough to break that code, but kernel is just lucky currently). > > How would it break the code exactly? It more sounded like an optimization > to me. Would it generate incorrect code without it?
See http://gcc.gnu.org/PR33294 for testcase which fails if compiled with gcc 4.2 and above. Yes, incorrect code can be generated without the patch as demonstrated by testcase, but i didn't analyze why kernel appears to work with 4.2 currently. - 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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