linux-kernel - [patch] x86, pebs: correct qualifier passed to ds_write_config() from ds_request

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Message-ID: <20090305085721.A22550@sedona.ch.intel.com>
Date:	Thu, 5 Mar 2009 08:57:21 +0100
From:	Markus Metzger <markus.t.metzger@...el.com>
To:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	hpa@...or.com
Cc:	markus.t.metzger@...el.com, markus.t.metzger@...il.com,
	roland@...hat.com, oleg@...hat.com, juan.villacis@...el.com,
	ak@...ux.jf.intel.com
Subject: [patch] x86, pebs: correct qualifier passed to ds_write_config() from ds_request_pebs()

ds_write_config() can write the BTS as well as the PEBS part of the DS config.
ds_request_pebs() passes the wrong qualifier, which results in the
wrong configuration to be written.

Reported-by: Stephane Eranian <eranian@...glemail.com>
Signed-off-by: Markus Metzger <markus.t.metzger@...el.com>
---

Index: gits/arch/x86/kernel/ds.c
===================================================================
--- gits.orig/arch/x86/kernel/ds.c	2009-03-04 14:41:15.000000000 +0100
+++ gits/arch/x86/kernel/ds.c	2009-03-04 14:49:01.000000000 +0100
@@ -729,7 +729,7 @@ struct pebs_tracer *ds_request_pebs(stru
 
 	spin_unlock_irqrestore(&ds_lock, irq);
 
-	ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
+	ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_pebs);
 	ds_resume_pebs(tracer);
 
 	return tracer;
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