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Date: Mon, 25 Sep 2006 14:22:13 -0700 From: Jeremy Fitzhardinge <jeremy@...p.org> To: Mathieu Desnoyers <compudj@...stal.dyndns.org> CC: Martin Bligh <mbligh@...gle.com>, "Frank Ch. Eigler" <fche@...hat.com>, Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>, prasanna@...ibm.com, Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...e.hu>, Paul Mundt <lethal@...ux-sh.org>, linux-kernel <linux-kernel@...r.kernel.org>, Jes Sorensen <jes@....com>, Tom Zanussi <zanussi@...ibm.com>, Richard J Moore <richardj_moore@...ibm.com>, Michel Dagenais <michel.dagenais@...ymtl.ca>, Christoph Hellwig <hch@...radead.org>, Greg Kroah-Hartman <gregkh@...e.de>, Thomas Gleixner <tglx@...utronix.de>, William Cohen <wcohen@...hat.com>, ltt-dev@...fik.org, systemtap@...rces.redhat.com, Alan Cox <alan@...rguk.ukuu.org.uk>, Karim Yaghmour <karim@...rsys.com>, Pavel Machek <pavel@...e.cz>, Joe Perches <joe@...ches.com>, "Randy.Dunlap" <rdunlap@...otime.net>, "Jose R. Santos" <jrs@...ibm.com> Subject: Re: [PATCH] Linux Kernel Markers 0.11 for 2.6.17 Mathieu Desnoyers wrote: > Better idea : we could put a read/write dependency on a memory location. > Yes, that works well. And it needn't even exist: extern int __marker_sequencer; /* doesn't exist, never referenced */ asm volatile("first asm" : "+m" (__marker_sequencer)); asm volatile("second asm" : "+m" (__marker_sequencer)); This keeps the asms ordered with respect to each other (and prevents to independent markers from being intermingled), but it doesn't prevent them from being re-ordered with respect to other code. J - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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