Messages in this thread | | | Date | Sun, 22 Jul 2007 11:05:24 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: Create clflush() inline, remove hardcoded wbinvd |
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Andi Kleen wrote: >> The main reason is that everyone seems to invoke it either incorrectly > Where is it incorrect?
Using "r" or "m" (as opposed as "+m") gives gcc the wrong dependency information, and it could, at least in theory, cause memory references to be moved around it -- especially when using "r".
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