linux-kernel - [PATCH] sputrace : use marker_synchronize

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Message-ID: <20080929151147.GH11245@Krystal>
Date:	Mon, 29 Sep 2008 11:11:47 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Lai Jiangshan <laijs@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jeremy Kerr <jk@...abs.org>, linuxppc-dev@...abs.org,
	Christoph Hellwig <hch@...radead.org>
Subject: [PATCH] sputrace : use marker_synchronize_unregister()

We need a marker_synchronize_unregister() before the end of exit() to make sure
every probe callers have exited the non preemptible section and thus are not
executing the probe code anymore.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
CC: Ingo Molnar <mingo@...e.hu>
CC: Jeremy Kerr <jk@...abs.org>
CC: linuxppc-dev@...abs.org
CC: Christoph Hellwig <hch@...radead.org>
---
 arch/powerpc/platforms/cell/spufs/sputrace.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6-lttng/arch/powerpc/platforms/cell/spufs/sputrace.c
===================================================================
--- linux-2.6-lttng.orig/arch/powerpc/platforms/cell/spufs/sputrace.c	2008-07-31 09:34:58.000000000 -0400
+++ linux-2.6-lttng/arch/powerpc/platforms/cell/spufs/sputrace.c	2008-07-31 09:35:15.000000000 -0400
@@ -233,6 +233,7 @@ static void __exit sputrace_exit(void)
 
 	remove_proc_entry("sputrace", NULL);
 	kfree(sputrace_log);
+	marker_synchronize_unregister();
 }
 
 module_init(sputrace_init);
-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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